Orban Optimod-FM 8300 Operating Manual page 66

2-18
INSTALLATION
below threshold. It is not designed to perform an AGC or gain-riding
function, and it cannot substitute for the AGC function in the 8300.
8. Select your primary input (analog or digital).
A) Press the N button.
EXT
B) If your main input source is digital, turn the knob to select D
D +J17. Otherwise, select A
IGITAL
The only digital encoding that typically uses J.17 pre-emphasis (of which
we are aware) is NICAM. D
most anyone using the digital input.
9. Set operating levels.
You will set the operating levels of the 8300 to match the input levels it is receiv-
ing so the 8300's AGC can operate in the range for which it was designed. There
are separate settings for the analog and digital inputs. If you provide both ana-
log and digital inputs to the 8300, optimum adjustment is achieved when the
gain reduction meters show the same amount of processing for both analog and
digital inputs.
This will allow you to switch between analog and digital inputs without
sudden level changes.
A) Press the N button.
EXT
B) Feed normal program material to the 8300.
C) Play program material from your studio, peaking at normal program levels
(typically 0VU if your console uses VU meters).
D) [Skip this step if you are not using the analog input.]
Hold down the A
meter indicates an average of 10 dB gain reduction.
E) [Skip this step if you are not using the digital input.]
Hold down the D
meter indicates an average of 10 dB gain reduction.
10. Set the analog output source.
If you do not need the 8300's analog output to drive a transmitter, you can con-
figure it to receive the output of a special low-delay version of the multiband
compressor. This signal is suited for driving headphones. The input/output delay
is approximately five milliseconds. Even though normal 8300 presets have a delay
of about 15 ms (which most DJs, announcers, and presenters can learn to use
without discomfort, although they may need some time to become accustomed
to it), the low-delay output will cause less bone conduction comb filtering. How-
ever, in most cases, the low-delay output will not be necessary to ensure ade-
quate talent comfort.
The 8300 offers several low-latency ("UL") presets having 5 ms delay and
the ability to drive a transmitter. However, the audio performance of
.
NALOG
, not D
IGITAL
soft button and adjust the knob so that the AGC
NALOG
soft button and adjust the knob so that the AGC
IGITAL
ORBAN MODEL 8300
+J17, is appropriate for al-
IGITAL
or
IGITAL