Tektronix Tektronix SPG8000, Technical Reference, Page: 58 / 118

Performance veri fi cation
14. Disconnect the cable from the BLACK 1 connector of the SPG8000 under
test and connect it to the BLACK 2 connector of the SPG8000 under test.
15. Repeat steps 5 through 13 for the BLACK 2 output.
16. Disconnect the cable from the BLACK 2 connector of the SPG8000 under
test and connect it to the BLACK 3 connector of the SPG8000 under test.
17. Repeat steps 5 through 13 for the BLACK 3 output.
Black output bit integrity
test
Perform the following test to insure that all the bits in the black generators are
working correctly. This test should be performed in factory mode. (See page 19,
Set SPG8000 to Factory Mode .)
1. Connect a cable from the BLACK 1 output of the SPG8000 under test to the
CMPST A input on the video monitor, and terminate the loopthrough with a
75
Ω terminator.
Figure 7: Setup for black output bit integrity test
2. Activate the waveform monitor composite input.
3. Press the BLACK button on the SPG8000 until you see BLACK 1 :
FORMAT .
4. Use the left ( ◄ ) or right ( ► ) arrow button to select NTSC .
5. Press the ENTER button.
6. Use the up ( ▲ ) arrow button to select CALIBRATION .
7. Press the ENTER button to select Amplitude Calibration .
NOTE. Write down the calibration setting (AMPL. DAC number) in case you
need to restore it later.
8. Press the right ( ► ) arrow until you see the Ramp HPF ramp signal.
44 SPG8000 Speci fi cations and Performance Veri fi cation