Incoming Inspection
SDI Input - Check Bit
Integrity
1. Connect the app
ropriate signal to the SDI A input:
a. With Option HD: 1080i 59.94 10-bit shallow ramp signal from HDVG1
b. All other options: 525/270 10-bit shallow ramp signal from DVG1
2. Terminate the SDI A loopthrough.
3. Press the FACTORY button to restore the factory preset.
4. Press and hold the WFM button to bring up the WFM pop-up menu.
5. Use the arr
ow keys to select the Pb waveform and turn it off. Leave all
others as is.
6. Press the
WFM button to close the menu.
7. Press the 5X gain button.
8. Press the VAR gain button and then use the GENERAL knob to increase
the gain to 10X.
9. Press the FULL button to expand the tile to full screen. Position the waveform
so that you can check the ramps.
10. Check a major division of both ramps in the signals. Check for 11 to 13 even
vertical steps over a major division (10 mV). The steps should always step
upwar
d in a monotonic ramp.
11. Press the VAR button to switch variable gain off and press 1X to return to
norm
al gain.
12. Change the input signal to a 100% sweep.
13. Verify the sine waves are uniform and do not have steps. Also verify that the
amplitude is 700 mV.
14. Move the input signal to input B, terminate the SDI B loopthrough, select
input B from t he front panel, and repeat steps 7 through 13.
15. Record Pass or Fail for SDI Bit Integrity in the test record.
58 Waveform Rasterizers Specifications and Performance Verification
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