Tektronix TEKFAX ADA400A, Instruction Manual

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Adjustment Procedures
ADA400A Differential Preamplifier
49
Table 22: Equipment Settings for LF Adjustments
ADA400A Setting
+ Input DC
-- Input Gnd
Gain 1
Upper Bandwidth Full (1 MHz)
Oscilloscope Setting
Vertical gain, Ch1 200 mV/div
Time base 20 s/div
Calibration Generator Setting
Output Mode Fast Rise, 10 kHz
2. Connect dual input connector to ADA400A input.
3. Connect 50
Ω
terminator to dual input connector.
4. Connect a coaxial cable to calibration generator fast rise output to 50
Ω
terminator.
5. Connect a coaxial cable from trigger out of calibration generator to Ch4 of
oscilloscope.
6. Adjust amplitude for 5 divisions on screen.
7.
Adjust CV6 for flat response.
8. Make the second equipment settings according to Table 23.
Table 23: Second Equipment Settings for LF Adjustments
ADA400A Setting
+ Input DC
-- Input DC
Oscilloscope Setting
Vertical gain 5 mV/div
Time base 20 s/div
9. Adjust CV14 for minimum trace.
10.
Disconnect setup.
This completes the ADA400A adjustment procedures.