Stanford Research Systems SR865A, Operation Manual

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Performance Tests 181
SR865A DSP Lock-in Amplifier
Appendix G
Performance Tests
Introduction
The performance tests described in this section are designed to verify with a high degree
of confidence that the unit is performing correctly.
The results of each test may be recorded on the test sheet at the end of this section.
Serial Number and Firmware Revision
If you need to contact Stanford Research Systems, please have the serial number of your
unit available. The 6-digit serial number is printed on a label affixed to the rear panel.
Press and hold [Local] and then [Auto Range] at the same time to display the unit serial
number and version numbers. The [Screen Layout] key exits this screen.
Preset
Throughout this section, it will be necessary to preset the lock-in into a known default
state. To do this, press [Save Recall], then touch {Recall default}. Touch {Confirm} to
reset the SR865A to its default settings. Each test generally starts with a preset. This
procedure will be referred to as {PRESET}.
Front Panel Test
To test the front panel, press and hold [Local] and then [Auto Range] at the same time.
Turn any knob to run through all of the LEDs. Make sure all of the knobs and all of the
LEDs work.
Touch and drag on the touchscreen to display a little trail. The bright end signifies the lift
location. This verifies the touch functionality.
Press each key to toggle its position (green/gray) on the screen. Keys with a second press
and hold function need to be held to toggle. The knobs also have a press and hold feature.
Check to see that all keys and knobs function.
The [Screen Layout] key exits this screen.
Keys, Knobs and Touch Buttons
These test procedures require the unit to be adjusted from the front panel. The test
procedures will follow this convention: