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5. Waiting for 10 seconds and record the reading of the DVM. Then, test next offset.
6. Repeat steps 4) to 5) until all the offset is tested over for CH1 and CH2.
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.
2. Set the parameters in the following sequence:
<Ref. Source>
Set to <Internal>
<Ref. Frequency>
Set to 997 Hz
<Sensitivity>
Set to <100 nV> through the spinning knob
<Reserve>
Set to <Low>
<Filter>
Set to <24 dB/oct>
<Disp>
Check the result
3. Wait until the reading is steady, and then record the maximum value of noise.
4. End the test and fill the result in the performance test form.
SE1201 Performance Test Record
Serial Number
Tested By
Firmware Revision
Date
Equipment Used
1. Self Tests
Pass
Fail
