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GDS-820/840 Operation Manual
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GDS-820/GDS-840
GDS-820/840 Operation Manual
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Due to continuous improvements in the GDS-820/840 Digital Storage
Oscilloscope, information contained in this manual is subject to change
without notice. Contact GW, for revisions and corrections.
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ATTENTION
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*: Measurement category IV is for measurement performed at the source of low-voltage installation
Measurement category III is for measurement performed in the building installation
Measurement category II is for measurement performed on the circuits directly connected to the
low voltage installation
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Before
depress the ON/STBY pushbutton of front panel, the main power switch of
rear panel have to be switched on
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*: The memory bar is always 500 points under RUN mode even the memory length is selected over 500 points, the oscilloscope is still displaying250points or 300points (menu off) on LCD screen waveform area.
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Note: All accuracy of these signals’ level are based on the probe 1 only
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Note: All accuracy of these signals’ level are based on the probe 1 only
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Note: The number select of “average” only effectiveness on the record
lengths of 500.
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(except record lengths of 500)
for this moment, the selection of average number is
ineffective
Note: The different between record lengths of 500 and the rest is the
“sampling”. If the “record lengths” is selected to 500, the sampling will be
triggered individually. If “record lengths” is the rest number, the sampling
is triggered for once.
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Note: Always 250 points plotted to screen on each acquisition.
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Note: GDS-820/840 does not support GDI printers.
Note: The USB of this oscilloscope is “DEVICE” only, this oscilloscope
DO NOT support any USB printers.
Note: Printer menu is only available for GDS-820S, GDS-820C, GDS-840S,
and GDS-840C.
Note: Interface menu is only available for GDS-820S, GDS-820C,
GDS-840S, and GDS-840C.
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Note: The “Data Bit” is always 8-bit.
Note: In order to communicate both oscilloscope and computer, please
download the USB driver for our website http://www.goodwill.com.tw.
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Note: The signal of “Go-No Go” BNC connector is “open collect”.
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Note: All the judgment condition are based on the setting of
. See next page for details.
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Data Terminal Equipmen
Note: RS-232 Interface is only available for GDS-820S, GDS-820C, GDS-840S,
and GDS-840C.
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Do not connect the output line of one DTE device to the output line of theother.
Many devices require a constant high signal on one or more input pins.
Ensure that the signal ground of the equipment is connected to the signalground of the external device.
Ensure that the chassis ground of the equipment is connected to thechassis ground of the external device.
Do not use more than 15m of cable to connect devices to a PC.
Ensure the same configurations are used on the device as the one used onPC terminal.
Ensure the connector for the both side of cable and the internal connectedline are met the demand of the instrument.
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Performance Condition: The electrical specifications found in these tables of
warranted specifications apply when the oscilloscope has been adjusted at an
ambient temperature between +20 and +30 , a warm-up period at least 30
minutes are necessary. This oscilloscope is operating at an ambient
temperature between 0 and +50 only.
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Only for GDS-820S, GDS-820C, GDS-840S,GDS-840C
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