Tektronix WFM90D, Быстрый старт

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Performance Verification: Digital Section
4- 16
WFM90D and WFM91D Service Manual
6. Check that the displayed video is 714 mV, 2% (approximately 1/4 major
division) from graticule baseline to white bar (0 IRE to +100 IRE for 525 or
0 V to +700 mV for 625).
7.
Set the
COMP SEL
to
BLUE
.
8. Check that the displayed video is 714 mV, 2% (approximately 1/4 major
division) from graticule baseline to white bar (0 IRE to +100 IRE for 525 or
0 V to +700 mV for 625).
9. Set the COMP SEL to RED .
10. Check that the displayed video is 714 mV, 2% (approximately 1/4 major
division) from graticule baseline to white bar (0 IRE to +100 IRE for 525 or
0 V to +700 mV for 625).
11. Set the COMP SEL to Y .
12. Check that the displayed video is 1 V, 2% (approximately 1/4 major
division) from sync tip to white bar (--40 IRE to +100 IRE for 525 or
--300 mV to +700 mV for 625).
13. Exit the digital waveform menu.
Check Frequency Response
This procedure verifies the following requirement:
Flat Filter, 1 V Full Scale, 50 kHz to 4.5 MHz, within 4%
1.
Enter the Configure menu. Select
PRESETS
and then select
DEFAULT
.
2. Select the WFM display mode on the WFM90D or WFM91D monitor.
3. Press MENU to display the waveform menu.
4. Change the SWEEP to 1H .
5. Press and hold MENU for two seconds to display the digital waveform
menu.
6.
Set the
COMP SEL
to
Y
and exit the menu.
7. Set the digital signal generator to output a 100% sweep signal.
8. Check that the variation in the peak-to-peak amplitude of the signal is less
than 4% from the beginning of the sweep to half-way between the last two
markers (0.25 major divisions on a 60% sweep or 0.4 major divisions on a
100% sweep to 4.5 MHz).