Tektronix WFM5200 Technical Reference page 66

Video and General Performance Verification Procedures
50
1.5 Gb/s checks.
1. Connect the TG700 HDVG7 SIGNAL 1 output to the SDI 1A input.
2. Set the HDVG7 to 1080 59.94i format. Select the "100% Color Bars" signal.
On the waveform monitor select input 1A . A Color Bar signal should be
displayed.
3. Disconnect the HDVG7 from the SDI 1A input. Connect the cable from
the HDVG7 to the 80 m HD Cable Clone Input (FFC model, Belden 8281,
300 kHz to 1.5 GHz).
4. Using a 75 Ω female-to-female BNC adapter and a second cable, connect the
Cable Clone Output to the SDI 1A input.
NOTE.
The 75 Ω BNC adapter should be included with the cable clone set.
5. Select the "SDI Matrix" signal from the TG700 HDVG7.
6. You should see a stable picture and waveform on the waveform monitor
display. The Y Chan and C Chan CRC Error Status on the Video Session
screen should both read OK.
7. Connect additional sections of the HD Cable Clone into the signal path to
find the longest length of "cable" that does not generate any CRC errors in a
10-second period.
8. The HD Cable Clone set described in the Required Equipment List simulates
up to 150 m of Belden 8281 when all four sections are connected. If your
instrument does not appear to show CRC errors at this simulated cable length,
reset the CRC Err Secs readout to zero (refresh the active display by pressing
a different display button and then returning to the current display). After
60 seconds, check the CRC Err Secs readouts. A "0" reading for both CRCs
indicates that the Cable Accommodation range is ≥150 m of Belden 8281.
NOTE.
If additional HD Cable Clone sections are available, the test may be
continued to find the point where CRC errors occur.
9. Add the HD Cable Clone section lengths to get the total length in meters of
Belden 8281 cable. Divide by 4 to calculate attenuation in dB at 750 MHz.
10. Record the value in the test record. Acceptable performance is 28 dB or
greater.
11. Starting from step 3, repeat the test for the SDI 1B input (Front Panel input
1B).
12. Repeat this procedure for SDI input 2A and 2B starting at step 3.
WFM5200 Waveform Monitor Specifications and Performance Verification