Tektronix SPG8000 Technical Reference page 66

Performance verification
GPI output functional test
52
11. Use the up (▲) arrow button to select CALIBRATION.
12. Use the left (◄) arrow button to select Set maximum positive voltage.
13. Press the ENTER button.
14. Record the voltage result in the test record.
15. Use the left (◄) arrow button to select Set maximum negative voltage.
16. Press the ENTER button.
17. Record the voltage result in the test record.
18. Solve for the difference between the two voltages you recorded to get the
p-p voltage.
19. Record the result in the test record.
20. Repeat this procedure for LTC 2, LTC 3, and LTC 4, skipping steps 7 and 8.
This procedure checks that the GPI output is functioning properly.
1. Use a 75 Ω cable to connect the BLACK 1 output of the reference unit to the
REF input connector of the SPG8000 under test, and terminate the reference
LOOP connector.
2. Set the BLACK 1 output of the reference unit to NTSC as follows:
a. Press the MODULE button to select the GPS7 module.
b. Press the down (▼) arrow button until SELECT OUTPUT appears in
the menu.
c. Use the left (◄) or right (►) arrow button until BLACK 1 appears in the
menu, and then press the ENTER button.
d. You should see SELECT FORMAT in the menu. If you do not, press the
down (▼) arrow button until it appears.
e. You should see NTSC on the menu. If you do not, press the left (◄) or
right (►) arrow button until NTSC appears, and then press the ENTER
button.
f. 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.
3. Set the REF input of the SPG8000 under test to NTSC as follows:
a. Press the REF button on the SPG8000.
b. Press the up (▲) arrow button until you see SOURCE.
c. Use the left (◄) or right (►) arrow button to select NTSC Burst.
SPG8000 Specifications and Performance Verification