DS335 Synthesized Function Generator

Performance Tests 4-7
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
50Ω.
2) Set the DS335 to sine wave, 10Vpp, and 50Ω 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-topeak
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
50Ω.
2) Set the DS335 to sine wave, 1MHz, 10Vpp, and 50Ω Load Impedance.
Set the scope to 2V/div vertical and 1µs/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
DS335 Synthesized Function Generator