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b) Set <Offset> of <Channel Output> in the following sequence:
Offset (%)
100.00
50.00
0.00
-50.00
-100.00
c) Waiting for 10 seconds and record the reading of the DVM. Then, test next group data.
d) Repeat steps 3-b) to 4-c) until finishing the tests for CH1. Then, connect the DVM to CH2 and continue to
finish the tests for CH2.
4. Follow the steps below:
a) modify settings: select <TOP> option in submenu [DISPLAY], set the <Type> and <Trace> to <List> and
<ADC> respectively.
b) use signal cable to connect the DVM to the Lock-in AUX_OUT 1 on rear panel.
c) set voltage output of the DC regulator source in the following sequence
Voltage (V)
10.000
5.000
0.000
-5.000
-10.000
d) Wait 10 seconds and record the reading of the <A1>. Then, test next group data.
e) Repeat steps 4b to 4D until finishing the tests for A1. Then connect the DC voltage source to A2, A3, A4
to finish the tests for A2, A3, A4.
5. Finish the tests for DC inputs and outputs and fill the results in the Performance Test Record Form.
6.9 Input Noise
This test measures the input noise of the lock-in.
Device
Connect a 50
Ω
BNC termination to the A/I input of the lock-in. This grounds the input so the lock-in
’
s own noise
is measured.
Steps
1. Turn the lock-in off and on to restart it.
