Tektronix SPG8000 Technical Reference page 98

Performance verification
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5. Check the signal quality on the SPG8000 under test as follows:
a. Press the STATUS button.
b. Press the down (▼) arrow button until you see STATUS : GPS.
c. Use the left (◄) or right (►) arrow button to view the GPS SIGNAL
QUALITY: 30.0 Sats: 4/4 readout. Check that the signal quality value is
greater than 30 and that the number of satellites is above 4/4.
6. Check the value on the SPG8000 under test. A value of 30 or above is
adequate.
7. Go to the diagnostics page on the reference unit and check that the system is
in Fine mode as follows. If it is not, then allow it to warm up and stabilize.
a. Use the up (▲) arrow button to select DIAGNOSTICS.
b. Press the ENTER button.
c. Press the right (►) arrow to display TUNE.
d. Check that Fine shows on the right side of the display.
e. Press BACK to exit Diagnostics menu.
8. Go to the diagnostics page on the SPG8000 under test and check that the
system is in Fine mode as follows. If it is not, then allow it to warm up and
stabilize.
a. Press the SYSTEM button.
b. Use the up (▲) arrow button to select DIAGNOSTICS.
c. Press the ENTER button.
d. Check that you can see SYSTEM : DIAGNOSTICS : TUNE in the
menu.
e. Press the right (►) arrow to display the Phase and DDS values.
f. Check that Fine shows to the right of the readings. If it does not, allow
more time for the system to stabilize.
g. Press BACK to exit the Diagnostics menu.
9. Set the BLACK 1 output on the reference unit to NTSC as follows:
a. Use the up (▲) or down (▼) arrow button to select SELECT OUTPUT.
b. Use the left (◄) or right (►) arrow button to select Black 1.
c. Press ENTER to display INPUT-OUTPUT.
d. Use the down (▼) arrow button to display SELECT FORMAT.
e. Press ENTER twice to select NTSC and Black Burst.
SPG8000 Specifications and Performance Verification