Offset Adjustment - Racal Instruments 3151 User Manual

3151 And 3151A User Manual

Offset Adjustment

Equipment: DMM, 50Ω feedthrough termination
1. Configure the Model 3151/3151A as follows:
Function:
Frequency:
Amplitude:
Offset:
Remote Commands: :RES
2. Connect the Model 3151/3151A output to the DMM input
through the 50Ω feedthrough termination. Set the DMM to
DCV measurements and 10 V range. Record this reading.
3. Change the offset setting to -7.19 V and adjust R85 to
have the exact reading as was recorded in the previous
step (with reversed polarity).
4. Adjust R62 until the DMM reading is -7.19 V "30 mV.
5. Repeat Steps 3 and 4 until the best result is obtained in
both steps.
Sine
1 MHz
1.61V
+7.19V
:OUTP ON
:FREQ 1e6
:VOLT 1.61
:VOLT:OFFS 7.19
Maintenance and Performance Checks 5-17