1-2
INTRODUCTION
ORBAN MODEL 9300
avoiding audible side effects and compromises in loudness or coverage). Because
such processing can make audible many defects ordinarily lost in the usual sea of
AM mud, it is very important that the source audio be as clean as possible. Orban's
publication
Maintaining
Audio Quality in the Broadcast Facility
(available in .pdf
) contains valuable information and specific suggestions for
improving the quality of your audio.
The rest of Section 1 explains how OPTIMOD-AM fits into the AM broadcast facility.
Section 2 explains how to install it and set it up. Section 3 tells how to operate
OPTIMOD-AM. Sections 4 through 6 provide reference information.
For best results,
feed OPTIMOD-AM unprocessed audio.
No other audio processing is
necessary or desirable.
If you wish to place level protection prior to your studio / transmitter link (STL), use
an Orban studio level control system expressly designed for this purpose. (At the
time of this writing, this is the Orban 6300 Multipurpose Digital audio Processor.)
The 6300 can be set up so that it substitutes for the broadband AGC circuitry in
OPTIMOD-AM, which is then defeated.
Making the Most of the AM Channel
OPTIMOD-AM
rides gain
over an adjustable range of up to 25dB, compressing
dynamic range and compensating for operator gain-riding errors and for gain in-
consistencies in automated systems.
OPTIMOD-AM
increases the density and loudness of the program mate-
rial
by multiband limiting and multiband distortion-canceling clipping, improv-
ing the consistency of the station's sound and increasing loudness and definition
without producing audible side effects.
OPTIMOD-AM
precisely controls peak levels
to prevent overmodulation.
OPTIMOD-AM
compensates for the high- and low-frequency rolloffs of
typical AM receivers
with a fully adjustable program equalizer providing up to
20dB of high-frequency boost (at 5 kHz) without producing the side effects en-
countered in conventional processors. This equalizer can thus produce extreme
preemphasis that is appropriate for very narrow-band radios. OPTIMOD-AM's ful-
ly parametric low- and mid-frequency equalizers allow you to tailor your air
sound to your precise requirements and desires. OPTIMOD-AM also fully supports
the NRSC standard preemphasis curve.
Controllable and Adjustable
OPTIMOD-AM comes with a
wide variety of factory presets
to accommodate
almost any user requirement. A single
L
ESS
-M
ORE
control easily modifies any fac-
tory preset. The user (via
F
ULL
C
ONTROL
) can further customize the presets, and
Summary of Contents for OPTIMOD-AM 9300
Page 1: ...Operating Manual OPTIMOD AM 9300 Digital Audio Processor Version 2 0 Software...
Page 7: ...Operating Manual OPTIMOD AM 9300 Digital Audio Processor Version 2 0 Software...
Page 178: ...3 46 OPERATION ORBAN MODEL 9300...
Page 200: ......
Page 221: ...OPTIMOD AM DIGITAL TECHNICAL DATA 6 21...
Page 222: ...6 22 TECHNICAL DATA ORBAN MODEL 9300 CONTROL BOARD PARTS LOCATOR...
Page 228: ...6 28 TECHNICAL DATA ORBAN MODEL 9300...
Page 229: ...OPTIMOD AM DIGITAL TECHNICAL DATA 6 29 I O DSP BOARD LEFT AND RIGHT ANALOG INPUTS...
Page 230: ...6 30 TECHNICAL DATA ORBAN MODEL 9300 I O DSP BOARD ANALOG OUTPUTS...
Page 231: ...OPTIMOD AM DIGITAL TECHNICAL DATA 6 31...
Page 238: ...6 38 TECHNICAL DATA ORBAN MODEL 9300 FRONT VIEW REAR VIEW FRONT PANEL PARTS LOCATOR DIAGRAM...