10. Input Noise - Stanford Research Systems SR850 User Manual

10. Input Noise

This test measures the lock-in input noise.
Setup
Connect a 50 termination to the A input. This grounds the input so the lock-in's own noise is measured.
Procedure
1) {PRESET} (Turn the lock-in off and on with the [ ] key pressed)
2) Press the keys in the following sequence:
[GAIN/TC]
<Sensitivity>
[TRACE/SCAN]
<Trace definition> (second soft key)
3) Wait until the reading of T1 (top display) stabilizes. Record the value of T1.
8) This completes the noise test. Enter the results of this test in the test record at the end of this section.
Use the knob to select 100 nV.
Highlight X.
Use the knob to select Xn.
Performance Tests
7-23