Tektronix SPG8000 Technical Reference page 47

SPG8000 Specifications and Performance Verification
3. Use a third 75 Ω BNC cable to connect the SDI A connector on the reference
unit to one of the SDI inputs on the waveform monitor.
4. Use a fourth 75 Ω BNC cable to connect the BLACK 1 connector on the
SPG8000 under test to the REF IN connector of the waveform monitor. Make
sure to terminate the reference loopthrough on the waveform monitor.
5. Press the composite input and the EXT REF buttons on the front panel of the
waveform monitor to display the composite input relative to the reference
signal.
6. Set the waveform monitor to 4-tile display mode and select the following
displays: WFM, Vector, Timing (press the MEAS button), and Video Session
(press the STATUS button).
NOTE.
In the timing display, make sure the "relative to" window indicates "Analog
DAC". If it does not, press and hold the MEAS button and correct it.
7. Load the factory default preset for both the reference unit and the SPG8000
under test. (See page 20, Load the factory preset.)
8. Set the reference unit source to Internal as follows:
a. Press the MODULE button until you see GPS7 in the menu.
b. Press the down (▼) arrow button until REFERENCE appears in the
menu, and then press the ENTER button.
c. Press the left (◄) arrow button until Internal appears in the menu as the
source, and then press the ENTER button.
d. Press the BACK button to exit the menu.
9. Do the following steps to check that the BLACK 1 output of the reference
unit is set to NTSC Black Burst. (This should have been done automatically
when the instrument was reset to factory default.)
a. Press the down (▼) arrow button until SELECT OUTPUT appears in
the menu.
b. Press the left (◄) or right (►) arrow until BLACK 1 appears in the menu,
and press the ENTER button.
c. You should see SELECT FORMAT in the menu. If you do not, press the
down (▼) arrow button until it appears.
d. You should see NTSC on the menu.
If you do, the output is set correctly. Press the BACK button and proceed
to step 10.
If you do not, press the left (◄) or right (►) arrow button until NTSC
appears, press the ENTER button. and then proceed to step e.
Performance verification
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