Stanford Research Systems SR865A Operation Manual page 200

182 Performance Tests
[Key]
<Knob>
{Touch}
Warm Up
The lock-in should be turned on and allowed to warm up for at least an hour before any
tests are performed. It is necessary to turn the unit off and on to preset it. As long as the
unit is powered on immediately, this will not affect the test results.
Necessary Equipment
The following equipment is necessary to complete the performance tests. The suggested
equipment or its equivalent should be used.
Test Record
Make a copy of the SR865A Performance Test Record at the end of this section. Fill in
the results of the tests on this record. This record will allow you to determine whether the
tests pass or fail and also to preserve a record of the tests.
SR865A DSP Lock-in Amplifier
Front panel keys are referred to in [square] brackets. Some keys have a
second italicized label. Press and hold these keys for 2 seconds to invoke
the italicized function.
Knobs are referred to in <angle> brackets. Knobs are used to adjust
parameters which have a wide range of values. Some knobs have a push
button function. Some also have a second italicized label. Press and hold
these knobs for 2 seconds to invoke the italicized function.
Touchscreen buttons and icons are referred to in {curly} brackets.
Touchscreen buttons are used to adjust the data display as well as change
certain lock-in parameters.
1. Frequency Synthesizer
Freq Range
Freq Accuracy
Harmonic Distortion
Spurious
TTL SYNC
2. AC Voltmeter
Freq Range
Input Ranges
Accuracy
Suggested instrument
3. DC Voltmeter
Range
Accuracy
4. Feedthrough Terminations
Impedance
1 Hz to 4 MHz
better than 5 ppm
≤ −65 dBc
≤ −55 dBc
available
10 Hz to 4 MHz
10 mV, 100 mV, 1 V
0.5% below 200 kHz, 2% below 2 MHz
Keysight model 3458A
19.999 V, 4 1/2 digits
0.005%
50 Ω, precision to ± 0.1%
Appendix G