TEK 2465B Calibration

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<p>DEPARTMENT OF THE ARMY TECHNICAL BULLETIN</p> <p>*TB 9-6625-2295-35</p> <p>CALIBRATION PROCEDURE FOR OSCILLOSCOPE, OS-288/G (TEKTRONIX, TYPE 2465B) AND TEKTRONIX, TYPES 2465B OPT46 AND 2467BHeadquarters, Department of the Army, Washington, DC 21 October 2002Approved for public release, distribution is unlimited.REPORTING OF ERRORS AND RECOMMENDING IMPROVEMENTS You can improve this manual. If you find any mistakes or if you know of a way to improve these procedures, please let us know. Mail your letter, DA Form 2028 (Recommended Changes to Publications and Blank Forms), or DA Form 2028, directly to Commander, U.S. Army Aviation and Missile Command, ATTN: AMSAM-MMC-MA-NP, Redstone Arsenal, AL 35898-5000. A reply will be furnished to you. You may also provide DA Form 2028 information to AMCOM via e-mail, fax, or the World Wide Web. Our FAX number is: DSN 788-6546 or Commercial 256842-6546. Our e-mail address is: 2028@redstone.army.mil. Instructions for sending an electronic 2028 may be found at the back of this manual. For the World Wide Web, use: https://amcom2028.redstone.army.mil.</p> <p>Paragraph SECTION I. IDENTIFICATION AND DESCRIPTION Test instrument identification ............................ Forms, records, and reports................................ Calibration description........................................ II. EQUIPMENT REQUIREMENTS Equipment required............................................ Accessories required........................................... III. CALIBRATION PROCESS Preliminary instructions..................................... Equipment setup ................................................ Vertical gain....................................................... Triggering .......................................................... Timing ............................................................... Bandwidth .......................................................... Calibrator........................................................... Parametric measurements ................................. Final procedure .................................................. 1 2 3 4 5 6 7 8 9 10 11 12 13 14</p> <p>Page 2 2 2 4 4 4 5 6 10 14 20 21 22 23</p> <p>_____ _____*This bulletin supersedes TB 9-6625-2295-35, dated 13 January 1997.</p> <p>TB 9-6625-2295-35Paragraph SECTION IV. MENU CALIBRATION PROCESS Prelim inary instructions..................................... Equipment setup ................................................ Power supply ...................................................... DAC REF and input capacitance.......................... CAL 01 horizontal............................................... CAL 02 vertical................................................... CAL 03 triggering ............................................... CAL 06 vertical transient response ..................... CAL 09 parametric measurements...................... Final procedure .................................................. 15 16 17 18 19 20 21 22 23 24 Page 23 24 25 27 27 33 35 36 39 40</p> <p>SECTION I IDENTIFICATION AND DESCRIPTION 1. Test Instrument Identification. This bulletin provides instructions for the calibration of Oscilloscope, OS-288/G (Tektronix, Type 2465B), and Tektronix, Types 2465B OPT 46 and 2467B. The manufacturer's manual was used as the prime data source in compiling these instructions. The equipment being calibrated will be referred to as the TI (test instrument) throughout this bulletin. a. Model Variations. equipped with an IEEE bus. Tektronix, Type 2465B OPT46 and 2467B OPT10 are</p> <p>b. Time and Technique. The time required for this calibration is approximately 6 hours, using the dc and low frequency technique. 2. Forms, Records, and Reports a. Forms, records, and reports required for calibration personnel at all levels are prescribed by TB 750-25. b. Adjustments to be reported are designated (R) at the end of the sentence in which they appear. Report only those adjustments made and designated with (R). 3. Calibration Description. TI parameters and performance specifications which pertain to this calibration are listed in table 1.Test instrument parameters Vertical gain CH1 and CH2 Table 1. Calibration Description Performance specifications Range: 2 mV/div to 5 V/div Accuracy: 2% (1 M input coupling) 3% (50 input coupling) Accuracy: (1.25% of reading + .03 div) Range: .1 and .5 V/div Accuracy: 10%</p> <p>V cursors CH 3 and CH 4</p> <p>2</p> <p>TB 9-6625-2295-35Table 1. Calibration Description - Continued Test instrument parameters Performance specifications Trigger level readout Accuracy: Within [3% of setting + 3% of p-p signal + 0.2 division + 0.5 mV +(0.5 mV x probe attenuation factor)] Sensitivity 0.35 division Dc to 50 CH 1 and CH2 1.0 division at 300 Dc coupled 1.5 division at 500 Ac coupled 0.35 division 60 Hz 1.0 division 1.5 division 0.5 x CH 1 or CH 2 requirement to at at 50 300 500</p> <p>MHz MHz MHz MHz MHz MHz</p> <p>CH 3 or CH 4 Horizontal timing A sweep</p> <p>Range: 500 ms/div to 5 ns/div extended to 0.5 ns with X10 mag Accuracy: 500 and 200 ms (1.2% of time interval +0.6% of FS) 100 ms to 5 ns (0.7% of time interval +0.6% of FS) X10 mag: (1.2% of time interval +0.6% of FS) Range: 50 ms/div to 5 ns/div extended to 0.5 ns with X10 mag Accuracy: 1.0% of time interval +0.6% of FS X10 mag: 1.5% of time interval +0.6% of FS Accuracy: X10 mag: Accuracy: X10 mag: Accuracy: X10 mag: (0.5% of time interval + 0.3% of FS) (1% of time interval + 0.3% of FS) (0.3% of time interval + 0.1% of FS + 200 ps) (0.8% of time interval + 0.1% of FS + 200 ps) (0.8% of time interval + 0.3% of FS (1.3% of time interval + 0.3% of FS)</p> <p>B sweep</p> <p> time with cursors</p> <p> time with sweep delay</p> <p> time with cursors on B sweep Delay sweep Bandwidth Calibrator Output voltage Repetition period Parametric measurement Period accuracy</p> <p>Accuracy: (0.3% of delay setting + 0.6% of FS) +0 to -25 ns Dc to 400 MHz at 5 mV or greater 0.4V 1% into 1 M load Two times the A SEC/DIV setting for SEC/DIV from 100 ns to 100 ms 0.1% during sweep time 0.9% + 0.5 ns + jitter error</p> <p>3</p> <p>TB 9-6625-2295-35 SECTION II EQUIPMENT REQUIREMENTS 4. Equipment Required. Table 2 identifies the specific equipment to be used in this calibration procedure. This equipment is issued with Secondary Transfer Calibration Standards Set AN/GSM-286. Alternate items may be used by the calibrating activity. The items selected must be verified to perform satisfactorily prior to use and must bear evidence of current calibration. The equipment must meet or exceed the minimum use specifications listed in table 2. The accuracies listed in table 2 provide a four-to-one ratio between the standard and TI. 5. Accessories Required. The accessories required for this calibration are common usage accessories issued as indicated in paragraph 4 above and are not listed in this calibration procedure.Table 2. Minimum Specifications of Equipment Required Minimum use Manufacturer and model specifications (part number) Volts out: John Fluke, Model 5820A-5CRange: 10 mV to 20 V GHz (5820A-5C-GHz) Accuracy: 0.5% Time markers: Range: .5 ns to .5 s Accuracy: 0.175% Pulses: Risetime: 0.225 ns Sine wave frequency range: 0 kHz to 500 MHz Range: 0 to 20 V John Fluke, Model 8840A/AFAccuracy: 0.025% 05/09 (AN/GSM-64D) Used in CAL 01 adjustment procedure Tektronix, Type 2465BOPT46 (2465BOPT46)</p> <p>Common name CALIBRATOR OSCILLOSCOPE</p> <p>DIGITAL MULTIMETER OSCILLOSCOPE</p> <p>SECTION III CALIBRATION PROCESS 6. Preliminary Instructions a. The instructions outlined in paragraphs 6 and 7 are preparatory to the calibration process. Personnel should become familiar with the entire bulletin before beginning the calibration. b. Items of equipment used in this procedure are referenced within the text by common name as listed in table 2. c. Unless otherwise specified, verify the results of each test and, whenever the test requirement is not met, take corrective action before continuing with the calibration. Adjustments required to calibrate the TI are included in this procedure. Additional maintenance information is contained in the manufacturer's manual for this TI.</p> <p>4</p> <p>TB 9-6625-2295-35 d. When indications specified in paragraphs 7 through 13 are not within tolerance, perform Section IV, Menu Calibration Process. After adjustments are made, repeat paragraphs 7 through 13. Do not perform Section IV if all other parameters are within tolerance. e. Unless otherwise specified, all controls and control settings refer to the TI. 7. Equipment Setup WARNING HIGH VOLTAGE is used or exposed during the performance of the calibration. DEATH ON CONTACT may result if personnel fail to observe safety precautions. REDUCE OUTPUT(S) to minimum after each step within the performance check where applicable. a. Connect TI to a 115 V ac source. NOTE When POWER pushbutton is pressed to ON, TI automatically performs a self-test sequence. Upon successful completion of self-test, TI will be in normal operating mode. NOTE If instrument is subjected to greater than 85 percent relative humidity, bandwidth is reduced by 50 MHz. After the instrument is subjected to greater than 85 percent relative humidity, it requires more than 50 hours of operation at less than 60 percent relative humidity before full bandwidth is restored. b. Press POWER pushbutton to ON and allow at least 20 minutes for equipment to warm up. NOTE If TI displays DIAGNSTIC, PUSH A/B TRIG TO EXIT at power on, one of the power-up tests has failed. If error message on bottom line of display is TEST 04 FAIL xx, where xx is 01, 02, 10, or 11, stored calibration data is in error. If this error message is displayed, press A/B TRIG pushbutton to exit diagnostic mode and perform Section IV. If any other error message occurs, the failure is probably not related to calibration. In this case, the instrument should be repaired before attempting calibration. c. Press corresponding pushbutton for indications as listed in (1) through (9) below:</p> <p>5</p> <p>TB 9-6625-2295-35 (1) VERTICAL MODE CH 1 and CH 2 on, CH 3 and CH 4 off. (2) VERTICAL MODE ADD and INVERT off. (3) VERTICAL MODE CHOP/ALT to ALT, and 20 MHz BW LIMIT to off. (4) CH 1 and CH 2 input coupling to 1 M AC. (5) TRIGGER MODE to AUTO LVL, and TRIGGER COUPLING to DC. (6) TRIGGER SOURCE to VERT CH 1 and TRIGGER SLOPE to + (plus). (7) TRACK/INDEP to INDEP. (8) V and t to off (cursors off). (9) Xl0 MAG to off. d. Position controls as listed in (1) through (9) below: (1) VERTICAL POSITION controls to midrange. (2) CH 1 and CH 2 VOLTS/DIV switches to 100 mV and VAR control cw to detent. (3) A SWP SEC/DIV switch to 2 ms (knobs locked) and VAR control cw to detent. (4) Horizontal POSITION control to midrange. (5) TRIGGER LEVEL control to midrange. (6) TRIGGER HOLDOFF control fully ccw to MIN. (7) TRACE SEP control fully cw. (8) SCALE ILLUM control fully ccw. (9) INTENSITY, FOCUS, and READOUT INTENSITY controls for suitable viewing. 8. Vertical Gain a. Performance Check (1) Press and hold CH 1 and CH 2 input coupling pushbuttons to PUSH BOTH BALANCE position until display readout indicates DC BALANCE IN PROGRESS. (2) When signal and readout displays automatically return to normal, connect oscilloscope calibrator output to CH 1. below: (3) Press corresponding pushbuttons for indications as listed in (a) through (e) (a) VERTICAL MODE CH 1 on, and VERTICAL MODE CH 2, CH 3, and (b) (c) (d) (e) 20 MHz BW LIMIT to on. CH 1 and CH 2 input coupling to 1 DC. TRIGGER coupling to DC. TRIGGER SOURCE to VERT CH 1.</p> <p>CH 4 off.</p> <p>6</p> <p>TB 9-6625-2295-35 (4) Set CH 1 VOLTS/DIV switch to 2 mV and A SWP SEC/DIV switch to 1 ms. (5) Position oscilloscope calibrator controls for 1 kHz voltage output. (6) Adjust oscilloscope calibrator output settings for 4 or 5 division display as per table 3 below. If oscilloscope calibrator error readout indication is not within 2 percent, perform b below.Table 3. Channel 1 Vertical Gain Test instrument Calibration Test instrument VOLTS/DIV generator vertical deflection switch settings output settings in divisions 5 2 mV 10 mV 5 mV 20 mV 4 10 mV 50 mV 5 20 mV 0.1 V 5 50 mV 0.2 V 4 100 mV 0.5 V 5 200 mV 1.0 V 5 500 mV 2.0 V 4 1.0 V 5.0 V 5 2.0 V 10.0 V 5 5.0 V 20.0 V 4</p> <p>(7) Press TRIGGER SOURCE lower pushbutton to select CH 2. (8) Press VERTICAL MODE pushbuttons CH 2 on, and CH 1 off. (9) Move connection from CH 1 to CH 2. (10) Adjust oscilloscope calibrator output settings for 4 or 5 division display as per table 4 below. If oscilloscope calibrator error readout indication is not within 2 percent, perform b below.Table 4. Channel 2 Vertical Gain Test instrument Calibration Test instrument VOLTS/DIV generator vertical deflection switch settings output settings in divisions 5 2 mV 10 mV 5 mV 20 mV 4 10 mV 50 mV 5 20 mV 0.1 V 5 50 mV 0.2 V 4 100 mV 0.5 V 5 200 mV 1.0 V 5 500 mV 2.0 V 4 1.0 V 5.0 V 5 2.0 V 10.0 V 5 5.0 V 20.0 V 4</p> <p>7</p> <p>TB 9-6625-2295-35 (11)Position oscilloscope calibrator controls for a 10 mV, 1 kHz output into 50. (12)Press CH 2 input coupling pushbutton to select 50 DC. (13)Adjust oscilloscope calibrator output settings for 4 or 5 division display as per table 5 below. If oscilloscope calibrator error readout indication is not within 3 percent, perform b below.Table 5. Channel 2 50 Input Gain Test instrument Calibration Test instrument VOLTS/DIV generator vertical deflection switch settings output settings in divisions 2 mV 10 mV 5 5 mV 20 mV 4 10 mV 50 mV 5 20 mV 0.1 V 5 50 mV 0.2 V 4 100 mV 0.5 V 5 200 mV 1.0 V 5 500 mV 2.0 V 4 1.0 V 5.0 V 5</p> <p>(14) Press VERTICAL MODE CH 2 pushbutton off and CH 1 on. (15) Press TRIGGER SOURCE upper pushbutton to select CH 1. (16)Press CH 1 input coupling pushbutton to select 50 DC. (17) Move connection from CH 2 to CH 1. (18) Adjust oscilloscope calibrator output settings for 4 or 5 division display as per table 6 below. If oscilloscope calibrator error readout indication is not within 3 percent, perform b below.Table 6. Channel 1 50 Input Gain Test instrument Calibration Test instrument VOLTS/DIV generator vertical deflection switch settings output settings in divisions 2 mV 10 mV 5 5 mV 20 mV 4 10 mV 50 mV 5 20 mV 0.1 V 5 50 mV 0.2 V 4 100 mV 0.5 V 5 200 mV 1.0 V 5 500 mV 2.0 V 4 1.0 V 5.0 V 5</p> <p>(19)Move connection from CH 1 to CH 3.</p> <p>8</p> <p>TB 9-6625-2295-35 (20) Press corresponding pushbuttons for indications as listed in (a) through (c) below: (a) TRIGGER SOURCE to select CH 3. (b) VERTICAL MODE CH 1 off and CH 3 on. (c) CH 3 VOLTS/DIV to display .1 V on CRT. (21) Adjust oscilloscope calibrator Scope Z 1 M and output settings for 4 or 5 division display as per table 7 below. If oscilloscope calibrator error readout indication is not within 3 percent, perform b below.Table 7. Channel 3 Input Gain Test instrument Calibration Test instrument VOLTS/DIV generator vertical deflection switch settings output settings in divisions 0.1 V 0.5 V 5 0.5 V 2 V 4</p> <p>(22) Move connection from CH 3 to CH 4. (23) Press corresponding pushbuttons for indications as listed in (a) through (c) below...</p>