Performance Verification: DigitalS ection
WFM90D and WFM91D ServiceManual 4-17
Check Frequency Response at X5 Gain
This procedureverifies 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. PressMEN U todisplay the waveform menu.
3. Set the GAIN to X5 and exit the menu.
4. Set the digital signal generatorto 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-peakamplitude of the signal is less
than 5% fromthe 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 theperfo rmance verification procedure. Press CONFIG to enter
the configurationmenu and return the PRESETS to DEFAULT.