Specifications

To adjust the low-frequency compensation
In this procedure, you adjust the low-frequency compensation adjustment for
each channel.
Table 7-14
Equipment Required
Equipment Critical specifications Recommended
Model/Part
Square wave
generator
30 kHz at about 3 V
p-p
HP 8112A
Feedthrough 50
Ω
, BNC (m) and (f) HP 11048C
Cable BNC HP 10503A
1
Using the
BNC
cable and 50-
Ω
feedthrough, connect the square wave
generator to channel 1. Use the 50-
Ω
feedthrough at the oscilloscope
input.
Channel 1 is labeled "1" on HP 54645A and "A1" on HP 54645D.
2
Adjust the generator for about 30 kHz at about 3 V
p-p
.
3
Press
Autoscale
.
4
Set channel 1 to 500 mV/div.
You must perform this adjustment on the 500-mV range.
Channel 1 is labeled "1" on HP 54645A and "A1" on HP 54645D.
5
Adjust the output of the generator until you obtain about 5 to 6
divisions of vertical deflection.
Testing, Adjusting, and Troubleshooting
To adjust the low-frequency compensation
7-35