Tektronix WVR6020, Техническое описание

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Video and General Performance Veri fi cation
Eye Gain (Option SD or HD
and EYE or PHY)
This test uses an 800 mV, 1 MHz square wave to check the Eye Gain. This
requires a 1 MHz square wave signal, provided by Tektronix, from the
TG2000 AVC1 module.
1. Press FACTORY.
2. Press CONFIG, and then select Utilities > Calibration. Press SEL to start
calibration.
3. Connect the AVG1 output to the SDI A input on the waveform monitor, and
select the 1 MHz square wave signal.
4. Terminate the other SDI A connector with a 75 Ω SDI terminator. (The
accuracy of this check depends directly on the accuracy of this terminator.)
5. Press the up or down arrow key if necessary to navigate the Eye Gain Adjust
SDI A calibration case. (The number and ordering of calibration cases varies
with installed options. If an Audio option is installed, press the up or down
arrow key repeatedly to move to the second page.)
6. Press SEL to begin this test.
7. Press the DISPLAY SELECT 1 button.
8. Position the display or use cursors to measure the waveform amplitude.
Check that the amplitude is between 760 mV and 840 mV.
9. Record this level in the test record for Eye Gain.
10. If the Eye Gain is outside the speci fi cation, perform the following adjustment
procedure:
a. Press the DISPLAY SELECT 4 button to return to the Calibration menu.
b. Use the General knob or up and down arrow buttons to adjust the
displayed amplitude of the eye waveform until it is 800 mV.
c. Press and hold STATUS, and then select Exit to exit calibration mode.
d. Repeat the Eye Gain test from step 1 and record the new values in the test
record for Eye Gain.
11. Record this level in the test record.
12. Option PHY only. Check that the Eye Amplitude readout in tile 2 is between
760 mV and 840 mV.
13. Repeat steps 3 through 12 for the SDI B input.
14. Press the DISPLAY SELECT 4 button to return to the Calibration menu.
15. Press and hold STATUS, and then select Exit. Press SEL to exit the
Calibration menu without saving.
Waveform Rasterizers Speci fi cations and Performance Veri fi cation 89