Tektronix ADA400A Instruction Manual page 54

Adjustment Procedures
LF Compensation
Adjustments
42
Table 19: Equipment Settings for CMRR Adjustments (Cont.)
Oscilloscope Setting
Number of waveforms to average 20
Trigger source Ch4
Sine Wave Generator Setting
Output 100 kHz, 1 Vp-p into 50 Q
2. Connect a coaxial cable from trigger output of sine wave generator to Ch4 of
a
H.
12.
13.
oscilloscope.
Connect dual input connector to inputs of ADA400A.
Connect 50 Q terminator to dual input connector.
Connect two 10X attenuators to 50 Q terminator.
Connect a coaxial cable from sine wave generator output to 10X attenuators.
Adjust trigger level for a steady display.
Adjust amplitude for 5 divisions (10 mV) on screen.
Remove the two 10X attenuators and connect the cable directly to the 50 Q
terminator.
Set ADA400A '—' input to DC.
Set oscilloscope to 2 mV/div.
Adjust CV4 and R18 for minimum signal amplitude (< 1 mV).
Disconnect setup.
Equipment One digitizing oscilloscope (item 1)
Required
One calibration generator (item 4)
One dual input coupler (item 6)
One 50 Q terminator {item 7)
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 20.
ADA4OOA Instruction Manual