Tektronix WVR5200 Specification And Performance Verification Technical Reference page 52

Incoming Inspection
External Reference
38
bits will show as coarse steps or discontinuities in the ramps. The standard
HDVG7 signal set will show 11 ramps of 70 mV each.
a. Press and hold the GAIN button to display the Gain menu.
b. Select Gain Settings.
c. Use the arrow keys to select x10.
d. Press the GAIN button once to close the Gain menu. The GAIN button
should remain lit.
6. Inspect one shallow ramp in each of the Y and Pr waveforms. Small steps
will be visible in the ramp. The steps should always step upward in equal
increments over the entire ramp. Check for 11 to 13 even vertical steps over a
major division (10 mV).
7. Press the GAIN button to return the instrument to x1 gain.
8. Change the input signal to a 100% sweep 1-15 MHz.
9. Verify that the sine waves are uniform and do not have steps. Also check
that the amplitude is 700 mV.
10. Move the input signal to the SDI 1B input and press the Input 1B button.
Select the shallow ramp matrix on the test signal generator.
11. Repeat steps 5 through 9 for the SDI 1B input.
12. Record Pass or Fail for the Waveform Stuck Bit Test in the test record.
13. Repeat this entire procedure for SDI Input 2A and SDI Input 2B.
1. Restore the Factory Preset. (See page 32, Restore the Factory Presets.)
2. Connect a 525/270 color bars signal from a DVG7 module to the SDI 1A
input of the instrument under test.
3. Apply an NTSC 0% Flat Field signal from an AVG7 module to the EXT REF
input of the instrument under test. The AVG7 and DVG7 must be installed in
the same TG700 mainframe or, if not, the signals must be genlocked. Install a
75 Ω termination on the other side of the EXT REF loop-through.
4. Press EXT REF on the instrument front panel.
5. The status bar in the lower left-hand corner of the display should display
Ref: NTSC.
6. Verify that the waveform displayed in tile 1 is stable.
7. Record Pass or Fail for NTSC Lock in the test record.
8. Change the signal applied to the EXT REF input to NTSC 100% Flat Field.
9. Press and hold the OTHER button, then select Ext Ref Waveform.
WVR5200 Waveform Rasterizer Specifications and Performance Verification