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Performance Verification: Digital Section
WFM90D and WFM91D Service Manual
4-17
Check Frequency Response at X5 Gain
This procedure verifies the following requirement:
Flat Filter, X5 Gain, 50 kHz to 4.5 MHz, within 5%.
1. Select the WFM mode on the WFM90D or WFM91D monitor.
2. Press MENU to display the waveform menu.
3. Set the GAIN to X5 and exit the menu.
4. Set the digital signal generator to output a 100% sweep signal.
5. Adjust the position control to view the bottom of the 100% sweep signal.
6. Check that the variation in the peak-to-peak amplitude of the signal is less
than 5% from the beginning of the sweep to half-way between the last two
markers (0.75 major divisions on a 60% sweep or 1.25 major divisions on a
100% sweep to 4. 5 MHz).
This completes the performance verification procedure. Press CONFIG to enter
the configuration menu and return the PRESETS to DEFAULT.