Tektronix WVR6020, Техническое описание

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Video and General Performance Veri fi cation
18. Set the RF generator output level to the corresponding setting. (See Table 64.)
19. While observing the waveform, increase the RF generator frequency in
10 MHz steps 2.0 GHz (600 MHz for WVR6020). Find the frequency that
results in the minimum waveform amplitude.
20. Set the RF generator level to the nearest corresponding setting. (See Table 64.)
21. If the waveform amplitude falls below that measured in step 11, calculate the
response in dB, as follows:
Response = 20 x log ( Smallest Amplitude / Reference Amplitude ).
Record this result in the test record as "minimum response". This value must
be greater (more positive) than –3.0 dB.
22. Set the RF generator frequency to 50 kHz.
23. Set the RF generator level to the level of the lowest frequency characterization
point. (See Table 64.)
24. Use the cursors to measure the 50 kHz waveform amplitude. (If Option PHY
is present, the Eye Amplitude readout in tile 2 may be used in place of the
cursor measurement.)
25. Calculate the 50 kHz response as follows: Response = 20 x log ( 50 kHz
Amplitude / Reference Amplitude )
This value must be greater (more positive) than –3 dB.
26. Record the 50 kHz response in the test record.
27. Move the signal source output to the SDI B input.
28. Press SDI B.
29. Set the RF Generator to 100 MHz.
30. Set the RF generator output level to the corresponding setting. (See Table 64
on page 76.)
31. Repeat steps 12 through 26 for the Digital B input.
32. Press the DISPLAY SELECT 4 button to return to the Calibration menu.
33. Press and hold STATUS, and then select Exit to exit calibration mode.
Waveform Rasterizers Speci fi cations and Performance Veri fi cation 91