OPTIMOD SURROUND PROCESSOR TECHNICAL DATA
6-5
Base and HD-SDI Configurations: Analog Audio Outputs
Configuration: One pair of outputs, which can be configured in software to emit LF, RF, C,
LB1, RB1, LFE, LB2, RB2, STEREO L, STEREO R, DOWNMIX L, DOWNMIX R, LF/RF,
C, LB1/RB1, LB2/RB2, STEREO L/R, and DOWNMIX L/R signals.
Source Impedance: 50Ω, electronically balanced and floating.
Load Impedance: 600Ω or greater, balanced or unbalanced. Termination not required or
recommended.
Output Level (100% peak modulation): Adjustable from –6 dBu to +24 dBu peak, into 600Ω
or greater load, software-adjustable.
Signal-to-Noise: ≥ 100 dB unweighted (Bypass mode, 20 Hz–20 kHz bandwidth, refer-
enced to 100% modulation).
Distortion: ≤ 0.01% THD (Bypass mode, de-emphasized) 20 Hz–20 kHz bandwidth.
Connectors: Two XLR-type, male, EMI-suppressed. Pin 1 chassis ground, Pins 2 (+) and 3
electronically balanced, floating and symmetrical.
D/A Conversion: 24 bit 128x oversampled.
Filtering: RFI filtered.
Audio Sync Input
Configuration: Can accept wordclock or AES11id (75Ω) sync, automatically selected.
Connector: Female BNC, shell grounded to chassis.
Termination: Unterminated. Use an external 75Ω terminator if the 8685 is the last item in
the chain.
Remote Computer Interface
Configuration: TCP/IP protocol via direct cable connect, modem, or Ethernet interface.
Modem is not supplied.
Serial Port: 115 kbps RS–232 port DB–9 male, EMI-suppressed.
Ethernet Port: 100 Mbit/sec on RJ45 female connector.
Base and HD-SDI Configurations: RS-485 Serial Interface (x2)
Hardware: 115 kbps RS–485 port DB–9 male, EMI-suppressed.
Compatibility: Designed to be hardware-compatible with Dolby Digital® hardware that
sends and receives Dolby Digital metadata.
Remote Control (GPI) Interface
Configuration: Eight (8) inputs, opto-isolated and floating.
Voltage: 6–15V AC or DC, momentary or continuous. 12 VDC provided to facilitate use with
contact closure.
Connector: DB–25 male, EMI-suppressed.
Control: User-programmable for any eight of user presets, factory presets, bypass, test
tone, stereo or mono modes, analog input, digital input.
Filtering: RFI filtered.
Tally Outputs
Circuit Configuration: Two NPN open-collector outputs.
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