Video and General Performance Verification
WVR6100, WVR7000, and WVR7100 Specifications and Performance Verification
2- 57
This test uses a network analyzer to check the reflections from the input. You can
also use the Spectrum Analyzer, tracking generator, and return loss bridge to
make this measurement.
1.
Turn on the network analyzer and set it for Return loss (the S11 measure-
ment).
2.
Set the frequency range for approximately 300 kHz to 500 MHz.
3.
Use the calibration kit and calibrate the network analyzer with one of the
BNC cables attached.
4.
Connect the calibrated end of the cable to the SDI input A of the waveform
rasterizer.
5.
Terminate the other SDI Input A connector.
6.
Measure the Return loss from 300 kHz to 270 MHz. Record the lowest
return loss value (the biggest reflection) over the frequency range in the test
record.
7.
Repeat steps 4 through 6 for SDI Input B.
Apply an SDI signal, that was converted from an NTSC signal, with VITC and
verify that the VITC is correctly decoded.
1.
Press FACTORY on the waveform rasterizer.
2.
Route the NTSC signal from the AVG1 to the VITC encoder.
3.
Connect the output of the VITC encoder to the NTSC to SDI converter.
4.
Connect the SDI from the converter to one of the SDI Input A input of the
DUT and terminate the other side of the loop through.
5.
Press CONFIG to display the Configuration menu. Select LTC/VITC from
the submenu, and then select VITC.
6.
Press CONFIG again to exit the menu.
7.
Verify that a decoded VITC is displayed in the lower-right corner of the
waveform rasterizer display.
8.
Verify the VITC is correct and record pass of fail in the test record.
SD SDI Return Loss, A
and B Inputs
(Option SD only)
SD VITC Decoding
Functionality
(Option SD only)