Stanford Research Systems SR865A, Operation Manual

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Appendix G Performance Tests 189
SR865A DSP Lock-in Amplifier
a) Use the front panel to make the following adjustments
Touch {Ampl} to display the amplitude keypad
Enter the amplitude from the table
Press [Input Range Down]
Select the input range from the table.
Press [Sensitivity Down]
Select the sensitivity from the table.
b) Wait for the R reading to stabilize. Record the value of R (yellow) for each sensitivity.
4) Frequency response is checked at frequencies above 1 kHz. The test frequencies are listed below.
Test Frequencies
1.0 kHz
10 kHz
100 kHz
1.0 MHz
a) Use the front panel to make the following adjustments
Touch {Ampl} to display the amplitude keypad
Enter the 100 mV
Press [Input Range Up/Down]
Set the input range to 100 mV.
Press [Sensitivity Up/Down]
Set the sensitivity to 100 mV.
b) Set the sine output to the frequency in the table.
Touch {Fint} to display the internal frequency keypad
Enter the frequency from the table.
c) Wait for the R reading to stabilize. Record the value of R (yellow).
d) Repeat steps 4b and 4c for all of the frequencies listed.
5) This completes the amplitude accuracy and frequency response test. Enter the results of this test
in the test record at the end of this section.