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