Stanford Research Systems DS335, Руководство пользователя

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Performance Tests 4-7
DS335 Synthesized Function Generator
4) Increase the scope sensitivity to 1V/div and measure the size of the
overshoot at the beginning of the square wave. It should be less than
0.2V peak-to-peak.
5) Adjust the scope to 2V/div and 5ns/div. Measure the 10% to 90% rise
time of the square wave. It should be less than 20ns.
Amplitude Flatness This test provides a visual indication of the sine wave amplitude flatness.
1) Connect the DS335's output to the oscilloscope input and terminate in
50
Ω
.
2) Set the DS335 to sine wave, 10Vpp, and 50
Ω
Load Impedance. Set to
linear sweep with a Unidirectional waveform. Set the start frequency to
1Hz, stop frequency to 3MHz, and the rate to 100Hz. Turn the DS335's
sweep ON.
3) Set the scope to 2V/div vertical, and 1ms/div horizontal. Trigger the
scope on the falling edge of the DS335's SWEEP output (Rear Panel).
4) The scope should show a sweep that is essentially flat. The peak-to-
peak variations should be less than ±1.2%. Ignore any dc variations,
using the peak-to-peak measurements for flatness comparison.
Output Level This test provides a visual check of the DS335's output level control.
1) Connect the DS335's output to the oscilloscope input and terminate in
50
Ω
.
2) Set the DS335 to sine wave, 1MHz, 10Vpp, and 50
Ω
Load Impedance.
Set the scope to 2V/div vertical and 1
µ
s/div horizontal.
3) Verify that the DS335's output is about 10V pk-to-pk.
4) Set the DS335 to 5Vpp verify the output.
5) Repeat step 4 at 1Vpp, 0.5 Vpp, 0.1 Vpp, and 0.05 Vpp. Adjust the
scope as necessary.
THIS COMPLETES THE FUNCTIONAL TESTS