Stanford Research Systems SR830, Manual

Page: 119 / 177

6-2
Performance Tests
Spurious
≤
-55 dBc
TTL SYNC available
Recommended SRS DS335
2. AC Calibrator
Freq Range 10 Hz to 100 kHz
Amplitude 1 mV to 10 V
Accuracy 0.1%
External phase locking capability
Recommended Fluke 5200A
3. DC Voltmeter
Range 19.999 V, 4 1/2 digits
Accuracy 0.005%
Recommended Fluke 8840A
4. Feedthrough Terminations
Impedance 50
Ω
Front Panel Display Test
To test the front panel displays, press the [Phase] and [Freq] keys
together. All of the LED's will turn on. Press [Phase] to decrease the
number of on LED's to half on, a single LED and no LED's on. Use the
knob to move the turned on LED's across the panel. Press [Freq] to
increase the number of on LED's. Make sure that every LED can be
turned on. Press any other key to exit this test mode.
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 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.