Tektronix SPG8000 Technical Reference page 48

Performance verification
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e. You should see Black Burst on the menu. If you do not, press the left
(◄) or right (►) arrow button until Black Burst appears, and then press
the ENTER button.
f. Press the BACK button twice to exit the menu.
10. Set the reference format of the SPG8000 under test to NTSC Burst as follows:
a. Press the REF button. You should see REFERENCE: SOURCE.
b. Press the right (►) arrow button until you see NTSC Burst in the menu,
and then press the ENTER button.
11. Set the BLACK 1 output of the SPG8000 under test to NTSC as follows:
a. Press the BLACK button. You should see BLACK 1 : FORMAT on
the menu display.
b. Press the right (►) arrow button until you see NTSC in the menu, and
then press the ENTER button.
12. Check the following and record Pass under NTSC Functional Genlock and
Timing in the test record if all conditions are met. If any of these conditions
are not met, record Fail.
Check that the EXT light on the front panel of the SPG8000 under test is
a steady green.
Check that the Timing display on the waveform monitor reads 0 lines of
offset and less than 0.1 μs of horizontal offset.
Check that the waveform in the Vector display on the waveform monitor
is stable and not spinning.
SPG8000 Specifications and Performance Verification