Tektronix WFM700 Series, Руководство по обслуживанию

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Performance Verification
WFM700 Series Waveform Monitors Service Manual
2- 53
This test verifies the amplitude and the rise and fall times of each AES output
Performance Requirement.
This test verifies performance characteristics and is
listed in the test record.
1. Connect the HD video generator to INPUT A using a 75
8
cable.
2. Set the HD video generator for a 1080i 59.94 100% color bars signal.
3. Set the HD video generator for 2 groups of embedded audio, starting with
group 1.
4. Connect the AES 1--2 I/O output to the 75
8
input of the test oscilloscope
using a 75
8
cable. Use a 75
8
-to-50
8
adapter on the input of the test
oscilloscope if necessary.
5. Press the CONFIG button.
6. Touch the Audio Inputs/Outputs soft key, then Next Menu .
7. Touch the AES Connectors soft key, then Output .
8.
Select
Input 1A
. (Select
Input 2A
if checking a second Input Module in
slot 2.)
9. Set the test oscilloscope to view the signal. The following oscilloscope
settings normally provide a usable display.
Vertical Scale 200 mV/div
Horizontal Scale 100 ns/div
Horizontal Trigger Position 30%
Trigger Slope Rising edge
Trigger Level 0 mV
10. CHECK that the amplitude of the waveform displayed on the oscilloscope is
between 0.9 V and 1.1 V.
11. Change the oscilloscope horizontal scale to 20 ns/div.
12. CHECK that the rise time of the waveform displayed on the oscilloscope is
between 30 ns and 44 ns.
13. Change the oscilloscope to trigger on the falling edge.
14. CHECK that the fall time of the waveform displayed on the oscilloscope is
between 30 ns and 44 ns.
15. Move the cable to each of the remaining AES I/O connectors and repeat
steps 9 through 14 for each AES I/O connector.
16. Disconnect the test setup.
Output Amplitude, Rise
Time and Fall Time