Tektronix WFM700 Series, Service Manual

Page: 80 / 194

Performance Verification
2- 48
WFM700 Series Waveform Monitors Service Manual
13. While observing waveform amplitude, adjust the RF generator frequency
down to 500 MHz (in 10 MHz steps). If the waveform amplitude falls below
the cursors set in the previous step (step 12), re-adjust the cursors to the new
minimum level.
14. Calculate the high frequency response using the formula:
High Frequency Response
20
log
10
Æ
Measured Minimum
800 mV
É
15. CHECK that the calculated high frequency response is between 0 and –3 dB.
16. Set the RF generator frequency to 50 kHz.
17.
Measure the waveform amplitude using the cursors and note the measure-
ment.
18. Calculate the low frequency response using the formula:
Low Frequency Response
20
log
10
Æ
Measured Minimum
800 mV
É
19. CHECK that the calculated low frequency response is between 0 and –3 dB.
20.
Move the input cable assembly from
Input A
to
Input B
.
21. Press the CURSOR button to exit cursor mode.
22. Touch the Input# soft key, touch Input B , then touch Done .
23. Repeat steps 7 through 19 for Input B .
24. Press the CURSOR button to exit cursor mode.
25. Touch Exit to exit Eye Bandwidth mode.
NOTE
. Most front panel buttons are disabled while in the Eye Sig BW Test mode.
You must use the Exit soft key to return instrument functions.
26. Disconnect the test setup.