Stanford Research Systems SR830, Manual

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4-3
Front Panel
the number of on LED's until all of the LED's are off. The SR830 is still
operating, the output voltages are updated and the unit responds to inter-
face commands. To change a setting, press any key other than [Phase]
or [Freq] to return to normal operation, change the desired parameter,
then press [Phase] and [Freq] together to return to the test mode. Turn
the LED's all off with the [Phase] key.
Keypad Test
To test the keypad, press the [Phase] and [Ampl] keys together. The
CH1 and CH2 displays will read 'PAd codE' and a number of LED indica-
tors will be turned on. The LED's indicate which keys have not been
pressed yet. Press all of the keys on the front panel, one at a time. As
each key is pressed, the key code is displayed in the Reference display,
and the nearest indicator LED turns off. When all of the keys have been
pressed, the display will return to normal. To return to normal operation
without pressing all of the keys, simply turn the knob.