Table 21: Equipment Settings For Cmrr Adjustments - Tektronix ADA400A Instruction Manual

CMRR Adjustments
ADA400A Differential Preamplifier
2. Connect dual input connector to inputs of ADA400A.
3. Connect 50 Ω terminator to dual input connector.
4. Connect a coaxial cable from sine wave generator output to 50 Ω terminator.
5. Connect another coaxial cable from trigger output of sine wave generator to
Ch4 of oscilloscope.
6. Adjust sine wave generator attenuator variable knob for 5 divisions (5 V) on
screen.
7. Set ADA400A '- -' input to DC.
8. Set oscilloscope volts/div to 1 mV.
9. Adjust RV17 for minimum signal amplitude.
10. Disconnect setup.
Equipment One digitizing oscilloscope (item 1)
Required
One sine wave generator (item 2)
One dual input coupler (item 6)
One 50 Ω terminator (item 7)
Two 10X attenuators (item 8)
Two coaxial cables (item 9)
One adjustment tool (item 10)
1. Connect the ADA400A to Channel 1 and make the equipment settings
according to Table 21.

Table 21: Equipment Settings for CMRR Adjustments

ADA400A
+ Input
- - Input
Gain
Upper Bandwidth
Oscilloscope
Vertical gain, Ch 1
Time base
Acquisition mode
Adjustment Procedures
Setting
DC
Gnd
100
FULL (1 MHz)
Setting
2 mV/div
5.0 s/div
Average
47