Stanford Research Systems DS360 Operating Manual And Programming Reference page 109

6. Waveforms
These procedures check the various output waveform characteristics.
Setup
The spectrum analyzer will be used to measure the waveform characteristicis of the noise and
2-Tone signals. The oscilloscope will be used to measure rise and fall times of the square wave.
Connect the + BNC output of the DS360 to the spectrum analyzer. Set the spectrum analyzer input to
shield grounded with AC coupling.
Procedure
1) Reset the DS360 (Turn power off, wait 2 seconds, then turn power on w/ [CLR] pressed).
2) Measure the frequency flatness of the white noise signal. Set the spectrum analyzer to exponential
RMS averaging with 500 averages at full span.
a) Press
[∨] (function down) three times to select white noise.
[AMPL] [1] [V
b) Autorange the spectrum analyzer and expand the scale to 1dB.
c) Verify that the spectrum lies within 1dB. Record the results on the test record.
3) Measure the frequency flatness of the pink noise. Change the spectrum analyzer to octave
analysis.
a) Press
[∨] (function down) to select pink noise.
[AMPL] [1] [V
b) Autorange the spectrum analyzer and expand the scale to 1dB.
c) Measure the amplitude for the bands from 20 Hz to 20 kHz. This will require several spans.
d) Verify that the amplitudes lie within 2dB. Record the results on the test record.
4) Measure the IMD (Inter Modulation Distortion) of the 2-Tone signal for 2 different 2-Tone
signals.
Tone 1
T1=1 kHz, 1V
RMS
T1=10 kHz, 1V
RMS
a) Set the spectrum analyzer to measure spectrum, RMS averaging with 10 averages and dBV
at full span.
b) Press
]
RMS
]
RMS
Tone 2
T2=20 kHz, 0.1V
RMS
T2=12 kHz, 1V
RMS
Performance Tests 6-15
2T1 + T2 2T1 - T2
22 kHz -----
32 kHz 8 kHz
DS360 Ultra Low Distortion Function Generator
2T2 + T1 2T2 - T1
41 kHz 39 kHz
34 kHz 12 kHz
RMS