Performance Verification
SPG 422 Service Manual (B034000 and above)
4–43
f.
Without altering any controls, connect the SPG 422 Genlock 2 to the
UNKNOWN arm of the return loss bridge.
g. The difference between the A and B traces is the return loss.
h. Check that the return loss for Genlock 2 is greater than 40 dB.
i.
Connect the precision terminator to the SPG 422 Genlock 1 input and set
the SPG 422 to genlock loopthrough.
j.
The difference between the A and B traces is the return loss.
k. Check that the return loss for genlock in loopthrough mode is greater
than 40 dB.
39. Black 1 and 2 Return Loss
≤
30 dB (0 to 5 MHz)
a. Connect the UNKNOWN cable to the Black 1 output.
b. The difference between the A and B traces is the return loss.
c.
Check that the return loss is greater than 30 dB.
d. Repeat for Black 2 and Black 3 through Black 6 if option 1 is installed.
Summary of Contents for SPG 422
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