Orban OPTIMOD-FM 8600, Operating Manual

Page: 306 / 397

5-8
TROUBLESHOOTING ORBAN MODEL 8600
Digitized SCA inputs do not appear at the analog composite outputs and
vice-versa (MPX hardware only)
This is normal: Non-digitized SCA inputs are summed into the analog composite
outputs in the analog domain after D/A conversion and digitized SCA inputs are only
summed into the digital composite outputs. If you need to use both the digital and
analog composite outputs, you must split the outputs of your SCA generators with Y
cables so that each generator output drives one digitized SCA input and one non-
digitized SCA input.
General Dissatisfaction with Subjective Sound Quality
The 8600 is a complex processor that can be adjusted for many different tastes. For
most users, the factory presets, as augmented by the gamut offered by the
L
ESS
-
M
ORE
control for each preset, are sufficient to find a satisfactory “sound.” However,
some users will not be satisfied until they have accessed other Modify Processing
controls and have adjusted the subjective setup controls in detail to their satisfac-
tion. Such users
must fully understand the material in Section 3 of this manual to
achieve the best results from this exercise.
Compared to competitive processors, the 8600 offers a uniquely favorable set of
trade-offs between loudness, brightness, distortion, and build-up of program densi-
ty. If your radio station does not seem to be competitive with others in your market,
the cause is usually source material (including excess use of lossy digital compres-
sion), overshoot in the transmission link (including the FM exciter) following the
8600, or an inaccurate modulation monitor that is causing you to under-modulate
the carrier. A station may suffer from any combination of these problems and they
can have a remarkable effect on the overall competitiveness of a station’s sound.
Section 1 of this manual provides a thorough discussion of system engineering con-
siderations, particularly with regard to minimizing overshoot and noise.
BS.1770 Safety Limiter produces too much gain reduction
Turn down the HD Final Limiter Drive control in the processing preset and save the
result as a User Preset. See step 20.C) on page 2-41.
Security Passcode Lost (When Unit is Locked Out)
Please see If You Have Forgotten Your All-Screens Passcode on page 2-48.
Connection Issues between the 8600 and a PC, Modem, or Net-
work
•
User Interface Slowdown : The more user presets you make, the more slowly
the 8600 will respond to front-panel commands. Delete any user presets you do
not need.
•
Software Updates : Close any running Windows programs before attempting to
update.
•
Interrupted Software Updates : If you canceled an update before it complet-
ed, wait at least one minute before attempting your next update.