Tektronix TEKFAX ADA400A, Instruction Manual

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Adjustment Procedures
ADA400A Differential Preamplifier
45
4. Adjust vertical position knob on the oscilloscope to center square wave on
screen.
5.
Adjust RV62 for 5.0 divisions on screen (50 mV).
6. Set ADA400A gain setting to 10.
7.
Set calibration generator to 0.5 V amplitude.
8. Adjust the vertical position knob on the oscilloscope to center square wave
on screen.
9. Adjust RV106 to 5.0 divisions.
Equipment
Required One digitizing oscilloscope (item 1)
1.
Connect the ADA400A to Channel 1 and make the equipment settings
according to Table 19.
Table 19: Equipment Settings for Offset Adjustments
ADA400A Setting
+ Input Gnd
-- Input Gnd
Gain 10
Upper Bandwidth 100 Hz
Offset Off (remains off through out the test)
Oscilloscope Control Setting
Channel Selection Ch1
Vertical input impedance
1
M
Ω
Vertical gain 500 V/div
Time base 5 ms/div
Vertical Coupling DC
Vertical Position 0 V (mid-scale)
Trigger mode Auto
Acquisition mode Hi Res
Bandwidth Full
2. Check to make sure oscilloscope is at position 0 and vertical offset 0.
Zero Offset Adjustments