Specifications

3-6. TROUBLESHOOTING.
In the event of difficulty with the 450 Subcarrier System, the following list of possible causes
should be reviewed prior to contacting the factory for repair. In the event that factory repair is
deemed necessary, please refer to Section 2-12., Repackaging, for information on returning the
unit.
450 Operation Manual Rev A Page 19 8/26/99
PROBLEM/SYMPTOM POSSIBLE CAUSE
Audio sound quality not If Compressor/Expander are
acceptable. Symptoms being used, both ends must
could include one or be set IN. If not being
more of the following: used both ends must be set
OUT. (See Section 3-4)
High distortion If Compressor/Expander are
Poor frequency resp. not being used, check inter-
Sounds too loud nal emphasis selection. (See
(compressed) Section 4-12 & 4-16) Both
Sounds too quiet ends must be set the same.
(expanded)
Sounds noisy
Audio is noisy, but Transmission path noise may
sounds normal in other require use of companding
respects. for acceptable noise perfor-
mance. Set Compressor and
Expander IN and re-evaluate.
(see Section 3-4)
If Compressor and Expander
are both IN, system may be
operating below threshold.
Check other system compo-
nents and antenna pointing.
In non-video systems, if the
subcarrier frequency is less
than about 4.5MHz, the high
pass filter in the receiver
may not be set OUT. (See
Section 4-17.)