Stanford Research Systems SR830, Manual

Page: 136 / 177

6-19
Performance Tests
9. DC Outputs and Inputs
This test measures the DC accuracy of the DC outputs and inputs of the lock-in.
Setup
We will use the digital voltmeter (DVM) to measure the DC outputs of the lock-in. Then we will use one of the
outputs to generate a voltage to measure on the DC inputs.
Connect a 50
Ω
termination to the A input.
Procedure
1) {PRESET} (Turn the lock-in off and on with the [Setup] key pressed)
2) For the CH1 and CH2 outputs, repeat steps 2a through 2e.
a) Connect the CH1 (or CH2) output to the DVM. Set the DVM to 19.999 V range.
b) Press
[Channel 1 (or 2) Offset On/Off]
Turn the offset on.
c) For each of the offsets in the table below, repeat steps 2d and 2e.
Offsets (%)
-100.00
-50.00
0.00
50.00
100.00
d) Press
[Channel 1 (or 2) Offset Modify]
Show the offset in the Reference display.
Use the knob to set the offset to the value in the table.
e) Record the DVM reading.
3) For each Aux Output (1, 2, 3 and 4), repeat steps 3a through 3e.
a) Press
[Aux Out]
Display the correct Aux Output level on the Reference display.
b) Connect the selected Aux Output (on the rear panel) to the DVM.