Orban Optimod-FM 8300 Operating Manual page 203

OPTIMOD-FM DIGITAL
P) Using the stereo monitor, verify that pilot tone injection is between 8% and
10% modulation. If it is outside these parameters, adjust it to 9% via S
S E
TEREO NCODER
If the measured pilot level varies by more than a few tenths of percent
from the pilot level indicated, this indicates there may be a problem
elsewhere — either in your measuring setup, or with the 8300.
Q) With the C
OMP
the 8300's composite outputs. Verify that the pilot tone frequency is 19,000
Hz 1 Hz.
9. Optional tests.
A) You can test each GPI (Remote Interface) input for functionality in the obvi-
ous way, by programming a function for it and then verifying that the func-
tion executes when you activate the input. To program a GPI input, see
Remote Control Interface Programming on page 2-36.
B) You can test the RS-232 Port 1 for functionality by verifying that you can con-
nect to a PC through a null modem cable. See Networking and Remote Con-
trol starting on page 2-37 (in particular, step 4 on page 2-39).
10. Return OPTIMOD-FM to service.
A) Remove the 600 resistors connected across the outputs.
B) Restore your normal operating parameters, using the notes you made in step
(1.B) on page 4-7.
C) Navigate to S
D) Recall your normal operating preset.
.
/ N / P L
EXT ILOT VL
2 L still set to 0.0%, connect a frequency counter to either of
VL
/ T / M and choose O
ETUP EST ODE
.
PERATE
4-13
MAINTENANCE
/
ETUP