OPTIMOD-AM DIGITAL
TECHNICAL DATA
6-1
Section 6
Technical Data
Specifications
It is impossible to characterize the listening quality of even the simplest limiter or
compressor based on specifications, because such specifications cannot adequately
describe the crucial dynamic processes that occur under program conditions. There-
fore, the only way to evaluate the sound of an audio processor meaningfully is by
subjective listening tests.
Certain specifications are presented here to assure the engineer that they are rea-
sonable, to help plan the installation, and make certain comparisons with other
processing equipment.
Performance
Except as noted, specifications apply for measurements from the analog left/right input to
the analog left/right output.
Frequency Response (Bypass Mode; Analog Processing Chain):
±
0.2 dB, 50 Hz–9.5
kHz, or as determined by user-settable high-pass and low-pass filters.
Frequency Response (Bypass Mode; Digital Processing Chain):
±
0.2 dB, 5 Hz – 15
kHz, or as determined by user-settable low-pass filter.
Noise:
Output noise floor will depend upon how much gain the processor is set for (Limit
Drive, AGC Drive, Two-Band Drive, and/or Multiband Drive), gating level, equalization,
noise reduction, etc. The dynamic range of the A/D Converter, which has a specified
overload-to–noise ratio of 110 dB, primarily governs it. The dynamic range of the digital
signal processing is 144 dB.
Total System Distortion
(de-emphasized, 100% modulation): <0.01% THD, 20 Hz–1 kHz,
rising to <0.05% at 9.5 kHz. <0.02% SMPTE IM Distortion.
Total System L/R Channel Separation:
>50 dB, 20 Hz – 9.5 kHz; 60 dB typical.
Polarity
: Both processing chains employ phase rotation so the input/output polarity is fre-
quency-dependent. All outputs have a user-settable software polarity switch, allowing
the AM channel’s asymmetrical processing to produce the correct modulation polarity at
the transmitter.
Processing Sample Rate:
The 9400 is a “multirate” system, using internal rates from 32
kHz to 256 kHz as appropriate for the processing being performed. Audio clippers oper-
ate at 256 kHz.
Processing Resolution:
Internal processing has 24 bit (fixed point) or higher resolution;
uses Motorola DSP56362 DSP chips.
Summary of Contents for Optimod-AM 9400
Page 1: ...Operating Manual OPTIMOD AM 9400 Digital Audio Processor Version 1 2 Software...
Page 7: ...Operating Manual OPTIMOD AM 9400 Digital Audio Processor Version 1 2 Software...
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Page 267: ...OPTIMOD AM DIGITAL TECHNICAL DATA 6 35 CPU Module...
Page 273: ...OPTIMOD AM DIGITAL TECHNICAL DATA 6 41 RS232 BOARD PARTS LOCATOR...
Page 275: ...OPTIMOD AM DIGITAL TECHNICAL DATA 6 43 8300 POWER SUPPLY PARTS LOCATOR...
Page 284: ...6 52 TECHNICAL DATA ORBAN MODEL 9400 DSP BOARD PARTS LOCATOR DRAWING 32170 000 14...
Page 292: ...6 60 TECHNICAL DATA ORBAN MODEL 9400 DISPLAY BOARD PARTS LOCATOR...
Page 293: ...OPTIMOD AM DIGITAL TECHNICAL DATA 6 61 DISPLAY BOARD...