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DTI REPORT NO. 655V
MIL-STD-167, TYPE I VIBRATION TEST REPORT FOR
901D OF THE ARGON SHIP EXPLORATION
EQUIPMENT INCREMENT E (SSEE-E) SYSTEM
Prepared For:
901D, LLC
360 Route 59Tallman, New York 10982-0615
Prepared Under:
Purchase Order No. S0250D
July, 2003
Publications Control No. R030701
Dynamic Testing A Division of DTI Holdings, LLC P.O. Box 494, 3915 Sunnymeade Rd., Rustburg, VA 24588 434-846-0244 [email protected]
DTI
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MIL-STD-167, TYPE I VIBRATION TEST
REPORT FOR 901D OF THE ARGON SHIP
EXPLORATION EQUIPMENT INCREMENT E
(SSEE-E) SYSTEM
Prepared For:901D, LLC
360 Route 59
Tallman, New York 10982-0615
Prepared Under:
Purchase Order S0250D
Prepared By:
Dynamic Testing
A Division of DTI Holdings, LLC
3915 Sunnymeade RoadRustburg, Virginia 24588
July, 2003
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TABLE OF CONTENTS
Section Title Page
1.0 INTRODUCTION .................................................................................................. 1
1.1 Purpose........................................................................................................ 1
1.2 Background................................................................................................. 11.3 Scope........................................................................................................... 1
2.0 APPLICABLE DOCUMENTS .............................................................................. 1
2.1 Military Specification ................................................................................. 1
2.2 Commercial Documents.............................................................................. 1
3.0 TEST REQUIREMENTS ....................................................................................... 2
3.1 Items Tested ................................................................................................ 23.2 Test Item Configuration.............................................................................. 2
3.2.1 HF Receive Rack ......................................................................... 23.2.2 System Control Rack ................................................................... 3
3.2.3 V/UHF Receive Rack .................................................................. 3
3.2.4 CCOP Rack.................................................................................. 4
3.3 Test Weights for EUT................................................................................. 4
4.0 VIBRATION TEST MACHINE ............................................................................ 5
5.0 TEST PROCEDURE .............................................................................................. 5
5.1 Mode of Operation...................................................................................... 5
5.2 Exploratory Vibration Test ......................................................................... 55.3 Variable Frequency Test ............................................................................. 6
5.4 Endurance Test............................................................................................ 6
6.0 VIBRATION TEST OF CCOP RACK .................................................................. 6
6.1 Test Installation of CCOP Rack.................................................................. 66.2 Instrumentation ........................................................................................... 9
6.3 Vertical Test................................................................................................ 12
6.3.1 Vertical Exploratory Test............................................................. 12
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TABLE OF CONTENTS (Continued)
Section Title Page
6.3.2 Vertical Variable Frequency Test ................................................ 126.3.3 Vertical Endurance Test............................................................... 13
6.4 Side-to-Side Test......................................................................................... 13
6.4.1 Side-to-Side Exploratory Test...................................................... 13
6.4.2 Side to Side Variable Frequency Test.......................................... 136.4.3 Side-to-Side Endurance Test........................................................ 14
6.5 Front-to-Back Test ...................................................................................... 14
6.5.1 Front-to-Back Exploratory Test................................................... 146.5.2 Front-to-Back Variable Frequency Test ...................................... 14
6.5.3 Front-to-Back Endurance Test..................................................... 15
7.0 VIBRATION TEST OF SYSTEM CONTROL RACK ......................................... 15
7.1 Test Installation of System Control Rack ................................................... 15
7.2 Instrumentation ........................................................................................... 18
7.3 Vertical Test................................................................................................ 21
7.3.1 Vertical Exploratory Test............................................................. 217.3.2 Vertical Variable Frequency Test ................................................ 21
7.3.3 Vertical Endurance Test............................................................... 22
7.4 Side-to-Side Test......................................................................................... 22
7.4.1 Side-to-Side Exploratory Test...................................................... 22
7.4.2 Side-to-Side Variable Frequency Test ......................................... 237.4.3 Side-to-Side Endurance Test........................................................ 23
7.5 Front-to-Back Test ...................................................................................... 24
7.5.1 Front-to-Back Exploratory Test................................................... 24
7.5.2 Front-to-Back Variable Frequency Test ...................................... 247.5.3 Front-to-Back Endurance Test..................................................... 25
8.0 VIBRATION TEST OF V/UHF RECEIVE RACK............................................... 25
8.1 Test Installation of V/UHF Receive Rack .................................................. 25
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TABLE OF CONTENTS (Continued)
Section Title Page
8.2 Instrumentation ........................................................................................... 288.3 Vertical Test................................................................................................ 30
8.3.1 Vertical Exploratory Test............................................................. 308.3.2 Vertical Variable Frequency Test ................................................ 30
8.3.3 Vertical Endurance Test............................................................... 31
8.4 Side-to-Side Test......................................................................................... 31
8.4.1 Side-to-Side Exploratory Test...................................................... 318.4.2 Side-to-Side Variable Frequency Test ......................................... 31
8.4.3 Side-to-Side Endurance Test........................................................ 32
8.5 Front-to-Back Test ...................................................................................... 32
8.5.1 Front-to-Back Exploratory Test................................................... 32
8.5.2 Front-to-Back Variable Frequency Test ...................................... 328.5.3 Front-to-Back Endurance Test..................................................... 33
9.0 VIBRATION TEST OF HF RECEIVE RACK...................................................... 33
9.1 Test Installation of HF Receive Rack ......................................................... 339.2 Instrumentation ........................................................................................... 36
9.3 Vertical Test................................................................................................ 39
9.3.1 Vertical Exploratory Test............................................................. 39
9.3.2 Vertical Variable Frequency Test ................................................ 40
9.3.3 Vertical Endurance Test............................................................... 41
9.4 Side-to-Side Test......................................................................................... 41
9.4.1 Side-to-Side Exploratory Test...................................................... 419.4.2 Side-to-Side Variable Frequency Test ......................................... 41
9.4.3 Side-to-Side Endurance Test........................................................ 42
9.5 Front-to-Back Test ...................................................................................... 42
9.5.1 Front-to-Back Exploratory Test................................................... 42
9.5.2 Front-to-Back Variable Frequency Test ...................................... 429.5.3 Front-to-Back Endurance Test..................................................... 43
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TABLE OF CONTENTS (Concluded)
Section Title Page
10.0 DISPOSITION OF MATERIALS.......................................................................... 43
11.0 SIGNATURES........................................................................................................ 43
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LIST OF TABLES
Table Title Page
1 Table Amplitudes.................................................................................................... 62 Test Instrumentation ............................................................................................... 9
3 Test Instrumentation ............................................................................................... 18
4 Test Instrumentation ............................................................................................... 285 Test Instrumentation ............................................................................................... 36
LIST OF PHOTOGRAPHS
Photograph Title Page
1 Vertical and Side-to-Side Orientations ............................................................. 7
2 Front-to-Back Orientation................................................................................. 8
3 Test Instrumentation ......................................................................................... 104 Test Instrumentation ......................................................................................... 11
5 Vertical and Side-to-Side Orientations ............................................................. 16
6 Front-to-Back Orientation................................................................................. 177 Test Instrumentation ......................................................................................... 18
8 Test Instrumentation ......................................................................................... 199 Test Instrumentation ......................................................................................... 20
10 Control Knob Ajar ............................................................................................ 22
11 Vertical and Side-to-Side Orientations ............................................................. 2612 Front-to-Back Orientation................................................................................. 27
13 Test Instrumentation ......................................................................................... 28
14 Test Instrumentation ......................................................................................... 29
15 Test Instrumentation ......................................................................................... 2916 Vertical and Side-to-Side Orientations ............................................................. 34
17 Front-to-Back Orientation................................................................................. 35
18 Test Instrumentation ......................................................................................... 3719 Test Instrumentation ......................................................................................... 38
20 Location of 5V Power Supply........................................................................... 39
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1.0 INTRODUCTION
1.1 Purpose
The purpose of this report is to document the results of MIL-STD-167-1 Vibration
Type I testing conducted on the Argon Ship Exploration Equipment Increment E(SSEE-E) System for 901D. Testing was conducted June 10 through 26, 2003.
1.2 Background
The Ship Exploration Equipment Increment E (SSEE-E) System is composed of
four 901D Model 100, externally-isolated cabinets, with the components beinglocated per the COTS equipment layout shown in Section 1.1 of 901Ds Shock
and Vibration Test Procedure for Argon Engineering Ship Signal Equipment
Increment E (SSEE-E) Data Item S00H, Rev. A, dated 24-April-2003. TheSSEE-E is planned for installation on all U.S. Navy ships. The first systems in
service will be installed onboard AEGIS cruisers and LHA5 ships, followed bythe LHD8 and LPA ships. It is a first article item (new production) and requires
vibration qualification in accordance with MIL-S-167-1 (Type 1).
1.3 Scope
This report describes the activities performed during the pre-test period, the
fixture and equipment installation on the vibration test machine, actual test
operations, instrumentation setup, physical inspections, operational tests, and testresults.
2.0 APPLICABLE DOCUMENTS
2.1 Military Specification
MIL-STD-167-1 dated May 1, 1974
2.2 Commercial Documents
DTI Drawing No. J-655 Test Fixtures for UNDEX TestingAgainst the SSEE-E Cabinets for
901D
901D Document No. D00231-QTP-001 Shock and Vibration Test Procedure
for Argon Engineering. Ship Signal
Equipment Increment E (SSEE-E)
Data Item S00H, Rev. A, dated 24-April-2003
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3.0 TEST REQUIREMENTS
3.1 Items Tested
1) HF Receive Rack
2)
System Control Rack3) V/UHF Receive Rack
4) CCOP Rack
The equipment under test (EUTs) were interconnected such that operability checks
could be performed. Initially, the CCOP was installed on the vibration table (see
Photograph Nos. 1 and 2) while the System Control, V/UHF Receive, and HFReceive Racks were test support items. The CCOP Rack test effort is described in
Section 6.0.
After completing CCOP Rack vibration testing, the CCOP Rack was removed from
the table and replaced with System Control Rack (see Photograph Nos. 5 and 6).The vibration test effort associated with System Control Rack is described in Section
7.0. In this arrangement, the CCOP, V/UHF Receive, and HF Receive Racks weretest support items.
After completing System Control Rack vibration testing, the System Control Rackwas removed from the table and replaced with V/UHF Receive Rack (see
Photograph Nos. 11 and 12). The vibration test effort associated with V/UHF
Receive Rack is described in Section 8.0. In this arrangement, the CCOP, SystemControl, and HF Receive Racks were test support items.
After completing V/UHF Receive Rack vibration testing, the V/UHF Receive Rack
was removed from the table and replaced with HF Receive Rack (see Photograph
Nos. 16 and 17). The vibration test effort associated with HF Receive Rack isdescribed in Section 9.0. In this arrangement, the CCOP, System Control, and
V/UHF Racks were test support items.
3.2 Test Item Configuration
3.2.1 HF Receive Rack
Manufacturer: 901D
Part No: 275032
Dimensions: 71.97 H x 22.0 W x 34.62 D (with isolators)Weight: 724 pounds
Vertical CG: 34 from mounting base
Shock Isolators: Base (6) 901D Part No. 70512-1Sway (2) 901D Part No. 70526-1
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Subsidiary Components of the HF Receive Rack
Qty. Hardware Item Vendor
1 AN/SSQ-137 (V) 1 Rack 901D
1 Patch Panel HF ARGON
1 Distribution Unit, RF ARGON
1 Printer Unit, Laser ARGON
1 Tuner, HF ARGON
1 Workstation, Intel (Jots3) ARGON
1 Keyboard/Display Unit ARGON
1 Digital Processing Unit ARGON
1 Uninterruptible Power Supply ARGON
3.2.2 System Control Rack
Manufacturer: 901D
Part No: 275033Dimensions: 71.97 H x 22.0 W x 34.62 D (with isolators)
Weight: 820 pounds
Vertical CG: 34 from mounting base
Shock Isolators: Base (6) 901D Part No. 70512-1
Sway (2) 901D Part No. 70526-1
Subsidiary Components of the System Control Rack
Qty. Hardware Item Vendor
1 AN/SSQ-137 (V) 1 Rack 901D
1 Time Unit, Precision ARGON
1 Distribution Unit, Time Frequency ARGON
1 Filter Unit, HF, V/UHF ARGON
1 Interface Unit, INT/EXT ARGON
1 Patch Panel Audio ARGON
1 Receiver, R-2411 ARGON
1 Up Converter ARGON
1 Workstation, Intel (Jots4) ARGON
1 Keyboard, Display Unit ARGON
1 Server, Unix (CUB) ARGON
1 Server Unix (LH) ARGON
1 Uninterruptible Power Supply ARGON
3.2.3 V/UHF Receive Rack
Manufacturer: 901D
Part No: 275034
Dimensions: 71.97 H x 22.0 W x 34.62 D (with isolators)
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Weight: 824 pounds
Vertical CG: 34 from mounting base
Shock Isolators: Base (6) 901D Part No. 70512-1
Sway (2) 901D Part No. 70526-1
Subsidiary Components of the V/UHF Receive Rack
Qty. Hardware Item Vendor
1 AN/SSQ-137 (V) 1 Rack 901D
1 Patch Panel, V/UHF ARGON
1 Distribution Unit, RF, V/UHF ARGON
1 Receiver, R-2412 ARGON
1 Receiver, V/UHF ARGON
1 Workstation, Intel (Jots5) ARGON
1 Keyboard/Display Unit ARGON
1 Digital Processing Unit ARGON
1 Uninterruptible Power Supply ARGON
3.2.4 CCOP Rack
Manufacturer: 901D
Part No: 275035
Dimensions: 71.97 H x 22.0 W x 34.62 D (with isolators)Weight: 297 pounds (dummy loaded to 800 lbs. for testing)
Vertical CG: 34 from mounting base
Shock Isolators: Base (6) 901D Part No. 70512-1Sway (2) 901D Part No. 70526-1
Subsidiary Components of the CCOP Rack
Qty. Hardware Item Vendor
1 AN/SSQ-137 (V) 1 Rack 901D
1 Uninterruptible Power Supply ARGON
3.3 Test Weights for EUT
1) HF Receive Rack
Test Fixture 1,594 poundsHF Receive Rack 724 pounds
Total Vibration Table Payload 2,318 pounds
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2) System Control Rack
Test Fixture 1,594 poundsSystem Control Rack 820 pounds
Total Vibration Table Payload 2,414 pounds
3) V/UHF Receive RackTest Fixture 1,594 pounds
V/UHF Receive Rack 824 pounds
Total Vibration Table Payload 2,418 pounds
4) CCOP Control Rack
Test Fixture 1,594 poundsCCOP Control Rack 820 pounds
Total Vibration Table Payload 2,414 pounds
4.0 VIBRATION TEST MACHINE
Manufacturer: L.A.B. CorporationModel No: RVH-72-5000
Serial No: 466013
5.0 TEST PROCEDURE
All EUT was vibration tested in three orthogonal axes (vertical, side-to-side and
front-to-back directions), from 4 to 33 hertz. A vibration test sequence wasperformed for each axis. As specified in MIL-S-167, the sequence included an
exploratory vibration test, variable frequency test and endurance test. The test
sequence in one direction was successfully completed before proceeding to test inanother direction.
5.1 Mode of Operation
The EUT was energized with 110 VAC power and operating during each
vibration test sequence.
5.2 Exploratory Vibration Test
The test item was secured to the vibration table and vibrated at frequencies
ranging from 4 to 33 hertz at table vibratory amplitudes of 0.020 0.004 inch(peak-to-peak). Each integral frequency was maintained for a minimum of 15seconds and frequencies and locations of resonances were noted.
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5.3 Variable Frequency Test
The test items were vibrated at frequencies ranging from 4 to 33 hertz in discrete
frequency intervals of 1 hertz at the amplitude shown in Table 1. Each integral
frequency was maintained for a minimum of 5 minutes and results for the EUT
are recorded in Section 6.0 through 9.0 of this test report.
Table 1. Table Amplitudes
Frequency (Hz.) Amplitude (inch peak-to-peak)
4 to 15 0.060 + 0.012
16 to 25 0.040 + 0.008
26 to 33 0.020 + 0.004
5.4 Endurance Test
This test was performed for 2 hours at either mount resonant frequency, structuralresonant frequency or 33 hertz if no structural or mount resonant frequency was
identified by the test engineer. If more than one resonance was identified the test
was performed at 1 hour for each identified frequency. The table amplitudes were
as noted in Table 1.
6.0 VIBRATION TEST OF CCOP RACK
6.1 Test Installation of CCOP Rack
The CCOP rack was installed on the test fixture. The rack was mounted to the test
fixture using three mount interface plates that attached the eight ShockTech 901D
isolators to the cabinets.
The 6 base isolators were bolted to the interface plates (3 mounts per plate) with a
total of 27 (9 per isolator) -20 UNC Grade 5 bolts, flat washers, lock washers,
and with nyloc nuts. The 2 sway brace isolators were bolted to the interface platewith a total of 12 (6 per isolator) -20 UNC Grade 5 bolts, flat washers, lock
washers, and with nyloc nuts.
All three-interface plates were attached to the test fixture using sixteen -13
Grade 5 bolts. The test fixture was clamped to the vibration table. Photograph
Nos. 1 and 2 show the installation on the table.
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Photograph No. 1. Vertical and Side-to-Side Orientations
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Photograph No. 2. Front-to-Back Orientation
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6.2 Instrumentation
One accelerometer was located at the center of the vibration table to measure
table amplitudes and three accelerometers were located on the fixture or the EUT.
The locations of the gauges are listed in Table 2. Photograph Nos. 3 and 4 show
the location of the test instrumentation.
Table 2. Test Instrumentation
Item Orientation Location
A1Direction of
ExcitationTable
A2Direction of
ExcitationCenter of Back Brace on Fixture
A3Direction of
ExcitationFront Top Right Corner of CCOP Rack
A4 Direction ofExcitation
Front Bottom Left Side of CCOP Rack, next to UPS
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Photograph No. 3. Test Instrumentation
A3
A4 A1
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Photograph No. 4. Test Instrumentation
A2
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6.3 Vertical Test
6.3.1 Vertical Exploratory Test
The vibration table was excited in the vertical direction at discrete frequencies
ranging from 4 to 33 hertz. A mount frequency was identified at 8.0 hertz andthere were no structural resonance frequencies identified.
6.3.2 Vertical Variable Frequency Test
Single amplitude results from the vertical variable frequency test are summarized
in the table below. A mount frequency was equally identified at 8.0 and 9.0 hertzand there were no structural resonance frequencies identified.
TableInput
Frequency
TableInput
Amplitude
BackBrace
ofFixture
TopRight
Side ofCabinet
BottomLeft
Side ofCabinet
Q of A3
(Hertz) A1 (Gs)
TableInput
AmplitudeA1
(Inches) A2(Gs)
A3 (Gs) A4 (Gs)
4.0000 0.0480 0.0294 0.0460 0.0570 0.0580 1.1875
5.0000 0.0600 0.0235 0.0580 0.0820 0.0820 1.366667
6.0000 0.0900 0.0245 0.0870 0.1480 0.1530 1.644444
7.0000 0.1243 0.0248 0.1203 0.3340 0.3234 2.687047
8.0000 0.1650 0.0252 0.1570 0.6920 0.6710 4.193939
9.0000 0.2930 0.0354 0.2770 1.0700 1.2430 3.651877
10.0000 0.3600 0.0352 0.3620 0.7950 0.7990 2.208333
11.0000 0.4050 0.0328 0.4100 0.6280 0.6160 1.550617
12.0000 0.4390 0.0298 0.4390 0.4850 0.4840 1.104784
13.0000 0.5460 0.0316 0.5390 0.4640 0.4640 0.849817
14.0000 0.5870 0.0293 0.6070 0.4110 0.4080 0.70017
15.0000 0.6230 0.0271 0.6730 0.3690 0.3610 0.592295
16.0000 0.5950 0.0227 0.7460 0.3410 0.3410 0.573109
17.0000 0.6880 0.0233 0.9290 0.3670 0.3610 0.53343
18.0000 0.8060 0.0243 0.8100 0.2760 0.2740 0.342432
19.0000 0.7940 0.0215 0.8190 0.2290 0.2350 0.288413
20.0000 0.9130 0.0223 0.9240 0.2270 0.2340 0.248631
21.0000 0.8680 0.0193 0.9027 0.1887 0.1925 0.217396
22.0000 1.1000 0.0222 0.9630 0.1830 0.1790 0.166364
23.0000 1.1800 0.0218 1.0600 0.1750 0.1630 0.148305
24.0000 1.1500 0.0195 1.1700 0.1820 0.1460 0.158261
25.0000 1.2600 0.0197 1.3200 0.2580 0.1550 0.204762
26.0000 0.7680 0.0111 0.8400 0.1710 0.1050 0.222656
27.0000 0.7690 0.0103 0.8180 0.1120 0.1370 0.145644
28.0000 0.7740 0.0097 0.8760 0.0370 0.1480 0.047804
29.0000 0.9100 0.0106 0.9060 0.0240 0.1390 0.026374
30.0000 0.8840 0.0096 1.0360 0.0070 0.1287 0.007919
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31.0000 0.9438 0.0096 1.1500 0.0040 0.1170 0.004238
32.0000 0.9940 0.0095 1.2300 0.0030 0.1070 0.003018
33.0000 1.2600 0.0113 1.2500 0.0100 0.0970 0.007937
6.3.3 Vertical Endurance Test
The endurance test (2 hours) was run at an excitation frequency of 8.0 hertz for
one hour and at an excitation frequency of 9.0 hertz for one hour.
6.4 Side-to-Side Test
6.4.1 Side-to-Side Exploratory Test
The vibration table was excited in the side-to-side direction at discrete frequenciesranging from 4 to 33 hertz. A mount frequency was identified at 7.0 hertz and
there were no structural resonance frequencies identified.
6.4.2 Side-to-Side Variable Frequency Test
Single amplitude results from the side-to-side variable frequency test are
summarized in the table below. A mount frequency was identified at 7.0 hertzand there were no structural resonance frequencies identified.
Table InputFrequency
TableInput
Amplitude
BackBrace ofFixture
TopRight
Side ofCabinet
BottomLeft Side
ofCabinet
Q of A3
(Hertz) A1 (Gs)
TableInput
AmplitudeA1
(Inches) A2 (Gs) A3 (Gs) A4 (Gs)
4.0000 0.0410 0.0251 0.0660 0.3790 0.1810 9.243902
5.0000 0.0600 0.0235 0.0750 0.2280 0.0750 3.8
6.0000 0.0910 0.0247 0.0960 0.2510 0.0590 2.758242
7.0000 0.1249 0.0249 0.1170 0.4270 0.0830 3.418735
8.0000 0.2241 0.0343 0.3439 0.4670 0.2550 2.083891
9.0000 0.2953 0.0357 0.4620 0.2770 0.5260 0.938029
10.0000 0.3570 0.0349 0.4870 0.4470 0.5000 1.252101
11.0000 0.4010 0.0324 0.5280 0.3870 0.2970 0.965087
12.0000 0.4610 0.0313 0.6080 0.3210 0.1960 0.696312
13.0000 0.5460 0.0316 0.7380 0.2990 0.1460 0.547619
14.0000 0.6130 0.0306 0.8310 0.2770 0.1070 0.451876
15.0000 0.8020 0.0349 1.1540 0.3140 0.0710 0.391521
16.0000 0.6260 0.0239 0.8630 0.2430 0.0490 0.388179
17.0000 0.6279 0.0213 0.9390 0.2430 0.0310 0.387004
18.0000 0.6510 0.0197 1.0120 0.2230 0.0220 0.34255
19.0000 0.7780 0.0211 1.2790 0.2770 0.0560 0.356041
20.0000 0.8720 0.0213 1.4600 0.3190 0.0860 0.365826
21.0000 0.8450 0.0188 1.4500 0.3150 0.1180 0.372781
22.0000 0.8650 0.0175 1.6290 0.3570 0.1760 0.412717
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23.0000 0.8865 0.0164 1.8320 0.4835 0.2510 0.545403
24.0000 0.9495 0.0161 2.1720 0.4177 0.5671 0.439916
25.0000 1.0450 0.0164 2.5850 0.8202 0.4392 0.78488
26.0000 0.6530 0.0095 1.6490 0.2040 0.3580 0.312404
27.0000 0.6815 0.0091 1.6300 0.2275 0.2272 0.333822
28.0000 0.6383 0.0080 1.7650 0.2488 0.1490 0.38978529.0000 0.9329 0.0109 2.7490 0.4798 0.2937 0.51431
30.0000 0.9375 0.0102 2.6310 0.5986 0.3890 0.638507
31.0000 0.9377 0.0096 3.0480 0.7558 0.5505 0.806015
32.0000 0.8876 0.0085 3.5670 1.1730 0.9121 1.321541
33.0000 1.0750 0.0097 3.6400 1.5000 1.0250 1.395349
6.4.3 Side-to-Side Endurance Test
The endurance test (2 hours) was run at an excitation frequency of 7.0 hertz for 2
hours.
6.5 Front-to-Back Test
6.5.1 Front-to-Back Exploratory Test
Prior to the front-to-back test, the test fixture was unclamped from the vibration
table, rotated 90, and re-secured to the table. Photograph No. 3 shows the testsetup in the rotated configuration. The vibration table was excited in the front-
back direction at discrete frequencies ranging from 4 to 33 hertz. A mount
frequency was identified at 8.0 hertz and there were no structural resonancefrequencies identified.
6.5.2 Front-to-Back Variable Frequency Test
Single amplitude results from the front-to-back variable frequency test are
summarized in the table below. A mount frequency was equally identified at 8.0
and 9.0 hertz and there were no structural resonance frequencies identified.
Table InputFrequency
TableInput
Amplitude
BackBrace ofFixture
TopRight
Side ofCabinet
BottomLeft Side
ofCabinet
Q of A3
(Hertz) A1 (Gs)
TableInput
AmplitudeA1
(Inches) A2 (Gs) A3 (Gs) A4 (Gs)
4.0000 0.0439 0.0269 0.0200 0.0430 0.0810 0.979499
5.0000 0.0630 0.0247 0.0420 0.1780 0.2914 2.825397
6.0000 0.1310 0.0356 0.2050 0.1830 0.4381 1.396947
7.0000 0.1840 0.0368 0.2440 0.2050 0.3664 1.11413
8.0000 0.1922 0.0294 0.2379 0.3750 0.2796 1.951093
9.0000 0.2830 0.0342 0.4080 0.5440 0.1410 1.922261
10.0000 0.3250 0.0318 0.4420 0.3230 0.0380 0.993846
11.0000 0.3590 0.0290 0.4720 0.2521 0.0530 0.702228
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12.0000 0.4330 0.0294 0.5530 0.2220 0.0710 0.512702
13.0000 0.5009 0.0290 0.6560 0.2112 0.0790 0.421641
14.0000 0.5690 0.0284 0.7350 0.1932 0.0780 0.339543
15.0000 0.7520 0.0327 0.9860 0.2010 0.0850 0.267287
16.0000 0.4820 0.0184 0.6310 0.1210 0.0530 0.251037
17.0000 0.6410 0.0217 0.8440 0.1340 0.0610 0.209048
18.0000 0.7400 0.0224 0.8560 0.1140 0.0470 0.154054
19.0000 0.8060 0.0219 1.0600 0.1260 0.0490 0.156328
20.0000 0.8982 0.0220 1.1800 0.1230 0.0460 0.136941
21.0000 0.8859 0.0197 1.2030 0.1070 0.0350 0.120781
22.0000 0.9180 0.0186 1.2700 0.1020 0.0240 0.111111
23.0000 0.9720 0.0180 1.3740 0.0930 0.0110 0.095679
24.0000 1.0740 0.0182 1.5490 0.0740 0.2750 0.068901
25.0000 1.2020 0.0188 1.7720 0.0880 0.1230 0.073211
26.0000 0.7100 0.0103 1.1100 0.2200 0.1718 0.309859
27.0000 0.7040 0.0095 1.0900 0.2250 0.1410 0.319602
28.0000 0.7310 0.0091 1.2000 0.1810 0.1060 0.247606
29.0000 0.8350 0.0097 1.3990 0.1930 0.1010 0.231138
30.0000 0.9090 0.0099 1.5880 0.1782 0.0825 0.19604
31.0000 0.8038 0.0082 1.7070 0.1990 0.0875 0.247574
32.0000 0.8830 0.0084 1.9610 0.2120 0.0830 0.240091
33.0000 0.9470 0.0085 1.9050 0.1990 0.0670 0.210137
6.5.3 Front-to-Back Endurance Test
The endurance test (2 hours) was run at an excitation frequency of 8.0 hertz for 1
hour and at an excitation frequency of 9.0 hertz for 1 hour.
7.0 VIBRATION TEST OF SYSTEM CONTROL RACK
7.1 Test Installation of System Control Rack
The System Control Rack was installed on the test fixture. The rack was mounted
to the test fixture using three mount interface plates that attached the eight
ShockTech 901D isolators to the cabinets. The 6 base isolators were bolted to theinterface plates (3 mounts per plate) with a total of 27 (9 per isolator) -20 UNC
Grade 5 bolts, flat washers, lock washers, and with nyloc nuts.
The two sway brace isolators were bolted to the interface plate with a total of 12(6 per isolator) -20 UNC Grade 5 bolts, flat washers, lock washers, and with
nyloc nuts.
All three-interface plates were attached to the test fixture using sixteen -13
Grade 5 bolts. The test fixture was clamped to the vibration table. Photograph
Nos. 5 and 6 show the installation on the table.
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Photograph No. 5. Vertical and Side-to-Side Orientations
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Photograph No. 6. Front-to-Back Orientation
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7.2 Instrumentation
One accelerometer was located at the center of the vibration table to measure
table amplitudes and three accelerometers were located on the fixture or the EUT.
The locations of the gauges are listed in Table 3. Photograph Nos. 7 through 9
show the location of the test instrumentation.
Table 3. Test Instrumentation
Item Orientation Location
A1Direction of
ExcitationTable
A2Direction of
ExcitationCenter of Back Brace on Fixture
A3Direction of
ExcitationFront Top Right Corner of CCOP Rack
A4 Direction ofExcitation
Front Bottom Left Side of CCOP Rack, next to UPS
Photograph No. 7. Test Instrumentation
A3
A4
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Photograph No. 8. Test Instrumentation
A1
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Photograph No. 9. Test Instrumentation
A2
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7.3 Vertical Test
7.3.1 Vertical Exploratory Test
The vibration table was excited in the vertical direction at discrete frequencies
ranging from 4 to 33 hertz. A mount frequency was identified at 7.0 hertz andthere were no structural resonance frequencies identified.
7.3.2 Vertical Variable Frequency Test
Single amplitude results from the vertical variable frequency test are summarized
in the table below. A mount frequency was identified at 7.0 hertz and there wereno structural resonance frequencies identified.
Table InputFrequency
TableInput
Amplitude
BackBrace of
Fixture
TopRight
Side ofCabinet
BottomLeft Side
ofCabinet
Q of A3
(Hertz) A1 (Gs)
TableInput
AmplitudeA1
(Inches) A2 (Gs) A3 (Gs) A4 (Gs)
4.0000 0.0466 0.0285 0.0465 0.0583 0.0600 1.251073
5.0000 0.0654 0.0256 0.0627 0.0937 0.0942 1.432722
6.0000 0.0915 0.0249 0.0958 0.1849 0.1836 2.020765
7.0000 0.1243 0.0248 0.1280 0.5301 0.5461 4.264682
8.0000 0.1600 0.0245 0.1369 0.2401 0.3436 1.500625
9.0000 0.2745 0.0332 0.2739 0.7620 0.7156 2.775956
10.0000 0.3470 0.0340 0.3465 0.6319 0.6069 1.821037
11.0000 0.3820 0.0309 0.3699 0.5044 0.4623 1.320419
12.0000 0.4456 0.0303 0.4438 0.4224 0.3978 0.947935
13.0000 0.5116 0.0296 0.4978 0.3931 0.3691 0.768374
14.0000 0.5759 0.0288 0.5750 0.3570 0.3335 0.619899
15.0000 0.6918 0.0301 0.7469 0.3497 0.3386 0.505493
16.0000 0.5055 0.0193 0.5165 0.2347 0.2272 0.464293
17.0000 0.6609 0.0224 0.6578 0.2557 0.2480 0.386897
18.0000 0.6834 0.0206 0.6697 0.2046 0.1982 0.299385
19.0000 0.8392 0.0228 0.8127 0.2254 0.2193 0.268589
20.0000 0.9049 0.0221 0.8776 0.2148 0.2084 0.237374
21.0000 0.8804 0.0195 0.8677 0.1862 0.1824 0.211495
22.0000 0.9439 0.0191 0.9321 0.1793 0.1756 0.189957
23.0000 1.0540 0.0195 1.0200 0.1736 0.1733 0.164706
24.0000 1.1590 0.0197 1.1400 0.1751 0.1687 0.151079
25.0000 1.2900 0.0202 1.2490 0.1698 0.1701 0.131628
26.0000 0.7786 0.0113 0.7956 0.1059 0.1088 0.136013
27.0000 0.7505 0.0101 0.7392 0.0943 0.0911 0.12565
28.0000 0.8136 0.0102 0.7946 0.0889 0.0842 0.109267
29.0000 0.9620 0.0112 0.9355 0.0915 0.0867 0.095114
30.0000 0.9652 0.0105 0.8840 0.0705 0.0675 0.073042
31.0000 0.9846 0.0100 1.0220 0.0940 0.1039 0.09547
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32.0000 1.0950 0.0105 1.1000 0.1162 0.1228 0.106119
33.0000 1.3210 0.0119 1.0720 0.1094 0.1114 0.082816
7.3.3 Vertical Endurance Test
The endurance test (2 hours) was run at an excitation frequency of 7.0 hertz.
7.4 Side-to-Side Test
7.4.1 Side-to-Side Exploratory Test
The vibration table was excited in the side-to-side direction at discrete frequenciesranging from 4 to 33 hertz. During the test, the control knob fell off of the
Receiver, R-2411, as seen in Photograph No. 10. The knob was re-attached and
the set screw tightened to prevent further loosening of the knob. A mountfrequency was equally identified at 8.0 and 9.0 hertz and there were no structural
resonance frequencies identified.
Photograph No. 10. Control Knob Ajar
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7.4.2 Side-to-Side Variable Frequency Test
Single amplitude results from the side-to-side variable frequency test are
summarized in the table below. A mount frequency was equally identified at 8.0
and 9.0 hertz and there were no structural resonance frequencies identified.
Table InputFrequency
TableInput
Amplitude
BackBrace ofFixture
TopRight
Side ofCabinet
BottomLeft Side
ofCabinet
Q of A3
(Hertz) A1 (Gs)
TableInput
AmplitudeA1
(Inches) A2 (Gs) A3 (Gs) A4 (Gs)
4.0000 0.0460 0.0281 0.0600 0.1790 0.0810 3.891304
5.0000 0.0600 0.0235 0.0620 0.1100 0.0270 1.833333
6.0000 0.1000 0.0272 0.0960 0.1380 0.0140 1.38
7.0000 0.1280 0.0256 0.1090 0.1920 0.0140 1.5
8.0000 0.1920 0.0294 0.2990 0.1690 0.1590 0.880208
9.0000 0.2660 0.0321 0.3950 0.3760 0.4240 1.413534
10.0000 0.3140 0.0307 0.4180 0.3630 0.3610 1.156051
11.0000 0.3480 0.0281 0.4500 0.2530 0.2470 0.727011
12.0000 0.4080 0.0277 0.5070 0.1970 0.1910 0.482843
13.0000 0.4830 0.0280 0.5530 0.1720 0.1610 0.356108
14.0000 0.5490 0.0274 0.6840 0.1550 0.1360 0.282332
15.0000 0.7090 0.0308 0.9300 0.1530 0.1200 0.215797
16.0000 0.5490 0.0210 0.7070 0.1100 0.0838 0.200364
17.0000 0.5700 0.0193 0.7470 0.1010 0.0640 0.177193
18.0000 0.6480 0.0196 0.8410 0.1030 0.0540 0.158951
19.0000 0.7790 0.0211 1.0610 0.1130 0.0460 0.145058
20.0000 0.8780 0.0215 1.1820 0.1150 0.0310 0.130979
21.0000 0.8240 0.0183 1.1340 0.1090 0.0210 0.132282
22.0000 0.9810 0.0198 1.4230 0.1350 0.0260 0.137615
23.0000 0.9510 0.0176 1.3480 0.1270 0.0510 0.133544
24.0000 1.0580 0.0180 1.5270 0.1560 0.1040 0.147448
25.0000 1.1690 0.0183 1.7190 0.2300 0.3580 0.196749
26.0000 0.7270 0.0105 1.1110 0.1476 0.1890 0.203026
27.0000 0.6830 0.0092 1.0570 0.1402 0.2530 0.205271
28.0000 0.7344 0.0092 1.2040 0.1326 0.2610 0.180556
29.0000 0.8150 0.0095 1.3050 0.1868 0.2335 0.229202
30.0000 0.8476 0.0092 1.4650 0.2180 0.1950 0.257197
31.0000 0.8390 0.0085 1.5230 0.1340 0.1660 0.159714
32.0000 0.9440 0.0090 1.6900 0.0970 0.1460 0.10275433.0000 1.0910 0.0098 1.5600 0.0380 0.1420 0.03483
7.4.3 Side-to-Side Endurance Test
The endurance test (2 hours) was run at an excitation frequency of 8.0 hertz for 1
hour and at an excitation frequency of 9.0 for 1 hour.
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7.5 Front-to-Back Test
7.5.1 Front-to-Back Exploratory Test
Prior to the front-to-back test, the test fixture was unclamped from the vibration
table, rotated 90, and re-secured to the table. Photograph No. 5 shows the testsetup in the rotated configuration. The vibration table was excited in the front-
back direction at discrete frequencies ranging from 4 to 33 hertz. A mount
frequency was identified at 8.0 hertz and there were no structural resonancefrequencies identified.
7.5.2 Front-to-Back Variable Frequency Test
Single amplitude results from the front-to-back variable frequency test are
summarized in the table below. A mount frequency was identified at 8.0 hertzand there were no structural resonance frequencies identified.
Table InputFrequency
TableInput
Amplitude
BackBrace ofFixture
TopRight
Side ofCabinet
BottomLeft Side
ofCabinet
Q of A3
(Hertz) A1 (Gs)
TableInput
AmplitudeA1
(Inches) A2 (Gs) A3 (Gs) A4 (Gs)
4.0000 0.0400 0.0245 0.0180 0.0420 0.0630 1.05
5.0000 0.0600 0.0235 0.0550 0.1640 0.2940 2.733333
6.0000 0.1190 0.0324 0.1900 0.1870 0.4010 1.571429
7.0000 0.1690 0.0338 0.2220 0.3240 0.3230 1.91716
8.0000 0.1910 0.0292 0.2720 0.3920 0.1070 2.052356
9.0000 0.2660 0.0321 0.3760 0.2850 0.0910 1.071429
10.0000 0.3090 0.0302 0.4040 0.2150 0.0930 0.695793
11.0000 0.3420 0.0277 0.4500 0.1660 0.0940 0.48538
12.0000 0.3860 0.0262 0.5070 0.1410 0.0960 0.365285
13.0000 0.4710 0.0273 0.6170 0.1380 0.0980 0.292994
14.0000 0.5330 0.0266 0.7010 0.1290 0.0940 0.242026
15.0000 0.6120 0.0266 0.7060 0.1360 0.0990 0.222222
16.0000 0.5300 0.0203 0.7100 0.0910 0.0710 0.171698
17.0000 0.5560 0.0188 0.7460 0.0800 0.0630 0.143885
18.0000 0.6260 0.0189 0.8490 0.0810 0.0620 0.129393
19.0000 0.7770 0.0211 1.0510 0.0860 0.0640 0.110682
20.0000 0.8710 0.0213 1.1840 0.0870 0.0660 0.099885
21.0000 0.8320 0.0185 1.1700 0.0740 0.0540 0.088942
22.0000 0.9000 0.0182 1.2700 0.0680 0.0520 0.075556
23.0000 0.9420 0.0174 1.3350 0.0610 0.0460 0.064756
24.0000 1.0580 0.0180 1.5510 0.0590 0.0470 0.055766
25.0000 1.1650 0.0182 1.7890 0.0570 0.0470 0.048927
26.0000 0.7510 0.0109 1.1510 0.0350 0.0290 0.046605
27.0000 0.6920 0.0093 1.1050 0.0330 0.0220 0.047688
28.0000 0.6940 0.0087 1.0910 0.0300 0.0180 0.043228
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29.0000 0.9030 0.0105 1.3920 0.0350 0.0190 0.03876
30.0000 0.8430 0.0092 1.1510 0.0300 0.0160 0.035587
31.0000 0.9050 0.0092 1.5980 0.0270 0.0100 0.029834
32.0000 0.9540 0.0091 1.7240 0.0220 0.0060 0.023061
33.0000 1.0800 0.0097 1.7180 0.0920 0.0250 0.085185
7.5.3 Front-to-Back Endurance Test
The endurance test (2 hours) was run at an excitation frequency of 8.0 hertz.
8.0 VIBRATION TEST OF V/UHF RECEIVE RACK
8.1 Test Installation of V/UHF Receive Rack
The V/UHF Receive rack was installed on the test. The rack was mounted to the
test fixture using three mount interface plates that attached the eight ShockTech901D isolators to the cabinets.
The 6 base isolators were bolted to the interface plates (3 mounts per plate) with a
total of 27 (9 per isolator) -20 UNC Grade 5 bolts, flat washers, lock washers,
and with nyloc nuts. The 2 sway brace isolators were bolted to the interface platewith a total of 12 (6 per isolator) -20 UNC Grade 5 bolts, flat washers, lock
washers, and with nyloc nuts. All 3 interface plates were attached to the test
fixture using sixteen -13 Grade 5 bolts. The test fixture was clamped to the
vibration table. Photograph Nos. 11 and 12 show the installation on the table.
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Photograph No. 11. Vertical and Side-to-Side Orientations
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Photograph No. 12. Front-to-Back Orientation
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8.2 Instrumentation
One accelerometer was located at the center of the vibration table to measure
table amplitudes and three accelerometers were located on the fixture or the EUT.
The locations of the gauges are listed in Table 4. Photograph Nos. 13 through 15
show the location of the test instrumentation.
Table 4. Test Instrumentation
Item Orientation Location
A1Direction of
ExcitationTable
A2Direction of
ExcitationCenter of Back Brace on Fixture
A3Direction of
ExcitationFront Top Right Corner of CCOP Rack
A4 Direction ofExcitation
Front Bottom Left Side of CCOP Rack, Next to UPS
Photograph No. 13. Test Instrumentation
A3
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Photograph No. 14. Test Instrumentation
Photograph No. 15. Test Instrumentation
A2
A1
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8.3 Vertical Test
8.3.1 Vertical Exploratory Test
The vibration table was excited in the vertical direction at discrete frequencies
ranging from 4 to 33 hertz. A mount frequency was identified at 8.0 hertz andthere were no structural resonance frequencies identified.
8.3.2 Vertical Variable Frequency Test
Single amplitude results from the vertical variable frequency test are summarized
in the table below. A mount frequency was identified at 8.0 hertz and there wereno structural resonance frequencies identified.
Table InputFrequency
TableInput
Amplitude
BackBrace of
Fixture
TopRight
Side ofCabinet
BottomLeft Side
ofCabinet
Q of A3
(Hertz) A1 (Gs)
TableInput
AmplitudeA1
(Inches) A2 (Gs) A3 (Gs) A4 (Gs)
4.0000 0.0470 0.0288 0.0470 0.0590 0.0590 1.255319
5.0000 0.0600 0.0235 0.0600 0.0860 0.0850 1.433333
6.0000 0.0900 0.0245 0.0900 0.1580 0.1560 1.755556
7.0000 0.1320 0.0264 0.1360 0.3660 0.3550 2.772727
8.0000 0.1800 0.0275 0.1590 0.6990 0.6190 3.883333
9.0000 0.2740 0.0331 0.2500 0.6340 0.6940 2.313869
10.0000 0.3720 0.0364 0.3670 0.6670 0.7110 1.793011
11.0000 0.4230 0.0342 0.4200 0.5560 0.5800 1.314421
12.0000 0.4780 0.0325 0.4770 0.4660 0.4940 0.974895
13.0000 0.5690 0.0330 0.5680 0.4460 0.4620 0.783831
14.0000 0.6300 0.0315 0.6330 0.3950 0.4150 0.626984
15.0000 0.7010 0.0305 0.6950 0.3600 0.3700 0.513552
16.0000 0.5580 0.0213 0.5600 0.2534 0.2650 0.454122
17.0000 0.6450 0.0218 0.6430 0.2660 0.2740 0.412403
18.0000 0.6800 0.0205 0.6640 0.2220 0.2260 0.326471
19.0000 0.8230 0.0223 0.7970 0.2370 0.2430 0.287971
20.0000 0.9270 0.0227 0.9230 0.2340 0.2410 0.252427
21.0000 0.8970 0.0199 0.8880 0.1990 0.1990 0.221851
22.0000 0.9760 0.0197 0.9450 0.1930 0.1950 0.197746
23.0000 1.0340 0.0191 0.9910 0.1810 0.1860 0.175048
24.0000 1.1600 0.0197 1.1200 0.1820 0.1850 0.156897
25.0000 1.3020 0.0204 1.2450 0.1850 0.1840 0.142089
26.0000 0.8210 0.0119 0.7540 0.1190 0.1230 0.144945
27.0000 0.7830 0.0105 0.7410 0.1040 0.0000 0.132822
28.0000 0.8297 0.0104 0.7850 0.1010 0.1020 0.121731
29.0000 0.9709 0.0113 0.9380 0.1060 0.1060 0.109177
30.0000 0.9920 0.0108 0.9240 0.0920 0.1030 0.092742
31.0000 1.0600 0.0108 0.9900 0.0960 0.0960 0.090566
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32.0000 1.1800 0.0113 1.0700 0.0960 0.0930 0.081356
33.0000 1.2700 0.0114 1.1400 0.0980 0.0960 0.077165
8.3.3 Vertical Endurance Test
The endurance test (2 hours) was run at an excitation frequency of 8.0 hertz.
8.4 Side-to-Side Test
8.4.1 Side-to-Side Exploratory Test
The vibration table was excited in the side-to-side direction at discrete frequenciesranging from 4 to 33 hertz. A mount frequency was identified at 7.0 hertz and
there were no structural resonance frequencies identified.
8.4.2 Side-to-Side Variable Frequency Test
Single amplitude results from the side-to-side variable frequency test are
summarized in the table below. A mount frequency was identified at 7.0 hertzand there were no structural resonance frequencies identified.
Table InputFrequency
TableInput
Amplitude
BackBrace ofFixture
TopRight
Side ofCabinet
BottomLeft Side
ofCabinet
Q of A3
(Hertz) A1 (Gs)
TableInput
AmplitudeA1
(Inches) A2 (Gs) A3 (Gs) A4 (Gs)
4.0000 0.0476 0.0291 0.0600 0.1740 0.0850 3.655462
5.0000 0.0600 0.0235 0.0620 0.1090 0.0300 1.816667
6.0000 0.1090 0.0296 0.1030 0.1550 0.0170 1.422018
7.0000 0.1400 0.0280 0.1240 0.2380 0.0460 1.7
8.0000 0.2200 0.0336 0.3380 0.1130 0.0360 0.513636
9.0000 0.3010 0.0364 0.4470 0.3120 0.3020 1.036545
10.0000 0.3460 0.0339 0.4430 0.3700 0.3270 1.069364
11.0000 0.3620 0.0293 0.4610 0.2400 0.2230 0.662983
12.0000 0.4680 0.0318 0.5980 0.1710 0.1930 0.365385
13.0000 0.5280 0.0306 0.6710 0.1610 0.1710 0.304924
14.0000 0.6160 0.0308 0.7880 0.1550 0.1460 0.251623
15.0000 0.5890 0.0256 0.8420 0.1400 0.1190 0.237691
16.0000 0.5570 0.0213 0.6690 0.0970 0.0850 0.174147
17.0000 0.5320 0.0180 0.6800 0.0810 0.0710 0.152256
18.0000 0.6170 0.0186 0.8711 0.0850 0.0700 0.137763
19.0000 0.8080 0.0219 1.0520 0.1020 0.0800 0.126238
20.0000 0.8310 0.0203 1.0930 0.0970 0.0690 0.116727
21.0000 0.8420 0.0187 1.0850 0.0910 0.0610 0.108076
22.0000 0.9790 0.0198 1.2800 0.1030 0.0670 0.105209
23.0000 0.9720 0.0180 1.2600 0.0990 0.0490 0.101852
24.0000 1.0740 0.0182 1.4790 0.1100 0.0450 0.102421
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25.0000 1.1870 0.0186 1.6460 0.1310 0.0400 0.110362
26.0000 0.7080 0.0103 1.0400 0.0870 0.0320 0.122881
27.0000 0.6880 0.0092 0.9890 0.0910 0.0240 0.132267
28.0000 0.6550 0.0082 0.9460 0.1040 0.0220 0.158779
29.0000 0.8610 0.0100 1.1920 0.1650 0.0510 0.191638
30.0000 0.7940 0.0086 1.1010 0.1190 0.0520 0.149874
31.0000 0.8240 0.0084 1.2230 0.1050 0.0350 0.127427
32.0000 0.9490 0.0091 1.4720 0.0720 0.0350 0.075869
33.0000 0.9700 0.0087 1.5020 0.0640 0.0220 0.065979
8.4.3 Side-to-Side Endurance Test
The endurance test (2 hours) was run at an excitation frequency of 7.0 hertz.
8.5 Front-to-Back Test
8.5.1 Front-to-Back Exploratory Test
Prior to the front-to-back test, the test fixture was unclamped from the vibration
table, rotated 90, and re-secured to the table. Photograph No. 12 shows the test
setup in the rotated configuration. The vibration table was excited in the front-back direction at discrete frequencies ranging from 4 to 33 hertz. A mount
frequency was identified at 8.0 hertz and there were no structural resonance
frequencies identified.
8.5.2 Front-to-Back Variable Frequency Test
Single amplitude results from the front-to-back variable frequency test aresummarized in the table below. A mount frequency was identified at 8.0 hertz
and there were no structural resonance frequencies identified.
Table InputFrequency
TableInput
Amplitude
BackBrace ofFixture
TopRight
Side ofCabinet
BottomLeft Side
ofCabinet
Q of A3
(Hertz) A1 (Gs)
TableInput
AmplitudeA1
(Inches) A2 (Gs) A3 (Gs) A4 (Gs)
4.0000 0.0440 0.0269 0.0210 0.0570 0.0810 1.295455
5.0000 0.0610 0.0239 0.0810 0.1720 0.3640 2.819672
6.0000 0.1220 0.0332 0.1730 0.1460 0.3450 1.196721
7.0000 0.1580 0.0316 0.1960 0.2310 0.2950 1.462025
8.0000 0.1720 0.0263 0.2340 0.4500 0.1840 2.616279
9.0000 0.2500 0.0302 0.3390 0.3640 0.0630 1.456
10.0000 0.2790 0.0273 0.3620 0.2440 0.0600 0.874552
11.0000 0.3170 0.0256 0.4080 0.1960 0.0640 0.618297
12.0000 0.3810 0.0259 0.4850 0.1730 0.0720 0.454068
13.0000 0.4460 0.0258 0.5540 0.1580 0.0730 0.35426
14.0000 0.5090 0.0254 0.6310 0.1460 0.0730 0.286837
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15.0000 0.6840 0.0298 0.8450 0.1480 0.0800 0.216374
16.0000 0.4980 0.0190 0.6390 0.0960 0.0550 0.192771
17.0000 0.5230 0.0177 0.6550 0.0850 0.0500 0.162524
18.0000 0.5830 0.0176 0.7480 0.0840 0.0490 0.144082
19.0000 0.7110 0.0193 0.9070 0.0910 0.0540 0.127989
20.0000 0.7960 0.0195 1.1070 0.0870 0.0530 0.109296
21.0000 0.7580 0.0168 0.9510 0.0740 0.0440 0.097625
22.0000 0.8530 0.0172 1.2070 0.0820 0.0490 0.096131
23.0000 0.9990 0.0185 1.2630 0.0840 0.0450 0.084084
24.0000 0.9930 0.0169 1.2890 0.0700 0.0390 0.070493
25.0000 1.1200 0.0175 1.4250 0.0700 0.0380 0.0625
26.0000 0.7680 0.0111 0.9860 0.0410 0.0260 0.053385
27.0000 0.7040 0.0095 0.9190 0.0350 0.0210 0.049716
28.0000 0.6760 0.0084 0.8900 0.0300 0.0180 0.044379
29.0000 0.8230 0.0096 1.1200 0.0320 0.0190 0.038882
30.0000 0.8880 0.0097 1.1900 0.0290 0.0170 0.032658
31.0000 0.8080 0.0082 1.0900 0.0200 0.0140 0.024752
32.0000 1.0200 0.0097 1.3900 0.0190 0.0160 0.018627
33.0000 0.9000 0.0081 1.1700 0.0190 0.0100 0.021111
8.5.3 Front-to-Back Endurance Test
The endurance test (2 hours) was run at an excitation frequency of 8.0 hertz.
9.0 VIBRATION TEST OF HF RECEIVE RACK
9.1 Test Installation of HF Receive Rack
The HF Receive rack was installed on the test fixture. The rack was mounted to
the test fixture using three mount interface plates that attached the eightShockTech 901D isolators to the cabinets. The 6 base isolators were bolted to the
interface plates (3 mounts per plate) with a total of 27 (9 per isolator) -20 UNC
Grade 5 bolts, flat washers, lock washers, and with nyloc nuts.
The two sway brace isolators were bolted to the interface plate with a total of 12
(6 per isolator) -20 UNC Grade 5 bolts, flat washers, lock washers, and with
nyloc nuts.
All three interface plates were attached to the test fixture using sixteen -13Grade 5 bolts. The test fixture was clamped to the vibration table. PhotographNos. 16 and 17 show the installation on the table.
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Photograph No. 16. Vertical and Side-to-Side Orientations
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Photograph No. 17. Front-to-Back Orientation
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9.2 Instrumentation
One accelerometer was located at the center of the vibration table to measure
table amplitudes and three accelerometers were located on the fixture or the EUT.
The locations of the gauges are listed in Table 5. Photograph Nos. 18 and 19
show the location of the test instrumentation.
Table 5. Test Instrumentation
Item Orientation Location
A1Direction of
ExcitationTable
A2Direction of
ExcitationCenter of Back Brace on Fixture
A3Direction of
ExcitationFront Top Right Corner of CCOP Rack
A4 Direction ofExcitation
Front Bottom Left Side of CCOP Rack, next to UPS
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Photograph No. 18. Test Instrumentation
A3
A4
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Photograph No. 19. Test Instrumentation
A1V
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9.3 Vertical Test
9.3.1 Vertical Exploratory Test
The vibration table was excited in the vertical direction at discrete frequencies
ranging from 4 to 33 hertz. During the start of the Exploratory test the HFReceive Rack lost 5V power. A new 5V power supply was installed and testing
was restarted. Photograph No. 20 shows the location of the 5V power supply that
was replaced. A mount frequency was identified at 8.0 hertz and there were nostructural resonance frequencies identified.
Photograph No. 20. Location of 5V Power Supply
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9.3.2 Vertical Variable Frequency Test
Single amplitude results from the vertical variable frequency test are summarized
in the table below. A mount frequency was identified at 8.0 hertz and there were
no structural resonance frequencies identified.
Table InputFrequency
TableInput
Amplitude
BackBrace ofFixture
TopRight
Side ofCabinet
BottomLeft Side
ofCabinet
Q of A3
(Hertz) A1 (Gs)
TableInput
AmplitudeA1
(Inches) A2 (Gs) A3 (Gs) A4 (Gs)
4.0000 0.0520 0.0318 0.0520 0.0650 0.0650 1.25
5.0000 0.0620 0.0243 0.0640 0.0930 0.0900 1.5
6.0000 0.0960 0.0261 0.0960 0.1620 0.1630 1.6875
7.0000 0.1240 0.0248 0.1270 0.3440 0.3340 2.774194
8.0000 0.1750 0.0268 0.1560 0.5280 0.5320 3.017143
9.0000 0.2740 0.0331 0.2500 0.6340 0.7360 2.313869
10.0000 0.3720 0.0364 0.3690 0.7760 0.7720 2.086022
11.0000 0.4210 0.0341 0.4200 0.5920 0.5910 1.406176
12.0000 0.5040 0.0343 0.5020 0.5080 0.5060 1.007937
13.0000 0.5790 0.0335 0.5660 0.4470 0.4420 0.772021
14.0000 0.6650 0.0332 0.6470 0.3990 0.4090 0.6
15.0000 0.6970 0.0303 0.6950 0.3460 0.3570 0.496413
16.0000 0.4980 0.0190 0.5160 0.2470 0.2550 0.495984
17.0000 0.6790 0.0230 0.6570 0.2630 0.2710 0.387334
18.0000 0.6270 0.0189 0.6450 0.2260 0.2250 0.360447
19.0000 0.8290 0.0225 0.8020 0.2240 0.2310 0.270205
20.0000 0.9290 0.0227 0.8980 0.1960 0.2210 0.21098
21.0000 0.8880 0.0197 0.8630 0.1960 0.1930 0.220721
22.0000 0.9650 0.0195 0.9240 0.2010 0.1940 0.20829
23.0000 1.1100 0.0205 1.0000 0.2030 0.1970 0.182883
24.0000 1.1500 0.0195 1.0600 0.1920 0.1880 0.166957
25.0000 1.2500 0.0196 1.2300 0.2040 0.2010 0.1632
26.0000 0.8220 0.0119 0.7740 0.1440 0.1430 0.175182
27.0000 0.7780 0.0104 0.7670 0.1380 0.1380 0.177378
28.0000 0.8360 0.0104 0.7870 0.1360 0.1360 0.162679
29.0000 0.9350 0.0109 0.9057 0.1400 0.1400 0.149733
30.0000 0.8081 0.0088 0.9184 0.1518 0.1387 0.187848
31.0000 0.8275 0.0084 0.8375 0.0945 0.1070 0.114199
32.0000 0.9820 0.0094 0.9030 0.1100 0.1110 0.11201633.0000 1.1080 0.0100 0.8920 0.0990 0.1148 0.08935
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9.3.3 Vertical Endurance Test
The endurance test (2 hours) was run at an excitation frequency of 8.0 hertz.
9.4 Side-to-Side Test
9.4.1 Side-to-Side Exploratory Test
The vibration table was excited in the side-to-side direction at discrete frequenciesranging from 4 to 33 hertz. A mount frequency was identified at 7.0 hertz and
there were no structural resonance frequencies identified.
9.4.2 Side-to-Side Variable Frequency Test
Single amplitude results from the side-to-side variable frequency test aresummarized in the table below. A mount frequency was identified at 7.0 hertz
and there were no structural resonance frequencies identified.
Table InputFrequency
TableInput
Amplitude
BackBrace ofFixture
TopRight
Side ofCabinet
BottomLeft Side
ofCabinet
Q of A3
(Hertz) A1 (Gs)
TableInput
AmplitudeA1
(Inches) A2 (Gs) A3 (Gs) A4 (Gs)
4.0000 0.0510 0.0312 0.0580 0.2250 0.0980 4.411765
5.0000 0.0620 0.0243 0.0670 0.1340 0.0320 2.16129
6.0000 0.0960 0.0261 0.0930 0.1530 0.0170 1.59375
7.0000 0.1440 0.0288 0.1240 0.2780 0.0860 1.930556
8.0000 0.2290 0.0350 0.3540 0.1870 0.0540 0.816594
9.0000 0.2860 0.0346 0.4070 0.3240 0.3040 1.132867
10.0000 0.3570 0.0349 0.4690 0.3480 0.3490 0.97479
11.0000 0.3980 0.0322 0.5060 0.2440 0.2450 0.613065
12.0000 0.4860 0.0330 0.6180 0.2070 0.2140 0.425926
13.0000 0.5570 0.0323 0.6860 0.1760 0.1860 0.315978
14.0000 0.6480 0.0324 0.8030 0.1590 0.1700 0.24537
15.0000 0.6970 0.0303 0.8630 0.1420 0.1510 0.20373
16.0000 0.5060 0.0193 0.6400 0.1030 0.1070 0.203557
17.0000 0.6580 0.0223 0.8380 0.1150 0.1140 0.174772
18.0000 0.6520 0.0197 0.8320 0.0890 0.0870 0.136503
19.0000 0.8060 0.0219 1.0310 0.0940 0.0950 0.116625
20.0000 0.8960 0.0219 1.1790 0.0910 0.0900 0.101563
21.0000 0.8500 0.0189 1.1330 0.0820 0.0780 0.096471
22.0000 0.9220 0.0186 1.2290 0.0860 0.0730 0.093275
23.0000 1.0890 0.0201 1.4170 0.0950 0.0760 0.087236
24.0000 1.0740 0.0182 1.4800 0.1010 0.0620 0.094041
25.0000 1.1940 0.0187 1.6410 0.1090 0.0590 0.09129
26.0000 0.7710 0.0112 1.0800 0.0770 0.0360 0.09987
27.0000 0.7200 0.0097 1.0300 0.0550 0.0330 0.076389
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28.0000 0.7500 0.0094 1.0740 0.0440 0.0280 0.058667
29.0000 0.8550 0.0100 1.1800 0.0400 0.0330 0.046784
30.0000 0.7790 0.0085 1.5200 0.0390 0.0340 0.050064
31.0000 1.0160 0.0103 1.1430 0.0270 0.0330 0.026575
32.0000 1.1400 0.0109 1.6600 0.0230 0.0350 0.020175
33.0000 1.0180 0.0091 2.0100 0.0830 0.0600 0.081532
9.4.3 Side-to-Side Endurance Test
The endurance test (2 hours) was run at an excitation frequency of 7.0 hertz.
9.5 Front-to-Back Test
9.5.1 Front-to-Back Exploratory Test
Prior to the front-to-back test, the test fixture was unclamped from the vibration
table, rotated 90, and re-secured to the table. Photograph No. 17 shows the testsetup in the rotated configuration. The vibration table was excited in the front-back direction at discrete frequencies ranging from 4 to 33 hertz. A mount
frequency was identified at 8.0 hertz and there were no structural resonance
frequencies identified.
9.5.2 Front-to-Back Variable Frequency Test
Single amplitude results from the front-to-back variable frequency test are
summarized in the table below. A mount frequency was identified at 8.0 hertz
and there were no structural resonance frequencies identified.
Table InputFrequency
TableInput
Amplitude
BackBrace ofFixture
TopRight
Side ofCabinet
BottomLeft Side
ofCabinet
Q of A3
(Hertz) A1 (Gs)
TableInput
AmplitudeA1
(Inches) A2 (Gs) A3 (Gs) A4 (Gs)
4.0000 0.0490 0.0300 0.0240 0.0650 0.0860 1.326531
5.0000 0.0620 0.0243 0.0600 0.1940 0.3480 3.129032
6.0000 0.1310 0.0356 0.1840 0.1750 0.4010 1.335878
7.0000 0.1680 0.0336 0.2030 0.3340 0.3240 1.988095
8.0000 0.1860 0.0284 0.2760 0.6550 0.2050 3.521505
9.0000 0.2660 0.0321 0.3840 0.4810 0.0800 1.808271
10.0000 0.3060 0.0300 0.4170 0.3160 0.0770 1.03268
11.0000 0.3420 0.0277 0.4610 0.2460 0.0710 0.719298
12.0000 0.4160 0.0283 0.5500 0.2270 0.0790 0.545673
13.0000 0.4770 0.0276 0.6310 0.2020 0.0780 0.42348
14.0000 0.5440 0.0272 0.7390 0.1940 0.0770 0.356618
15.0000 0.7250 0.0315 0.9830 0.2070 0.0770 0.285517
16.0000 0.4680 0.0179 0.6800 0.1310 0.0540 0.279915
17.0000 0.6380 0.0216 0.8900 0.1510 0.0600 0.236677
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