Orban OPTIMOD-FM 8700, Operating Manual

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6-4
TECHNICAL DATA ORBAN MODEL 8700i
Digital Sync Input
Configuration: Used for synchronization of either or both AES3 signals to an external ref-
erence provided at this input.
Sampling Rate: 32 kHz, 44.1 kHz, 48 kHz, 88.2 kHz, and 96 kHz, automatically selected.
Connector : XLR-type, female, EMI-suppressed. Pin 1 chassis ground, Pins 2 and 3 trans-
former balanced and floating, 110

impedance.
Filtering: RFI filtered.
Hardwire Bypass: Removing power from the Optimod will connect the Digital Sync
Input to Digital Output #2 via a relay.
Wordclock/10 MHz Sync Reference Input
Configuration: Accepts 1x wordclock or 10 MHz reference signals, automatically selected.
The DSP master clock can be phase-locked to these signals, which in turn phase-locks
the 19 kHz pilot tone frequency, facilitating single-frequency network operation. The digi-
tal output sample frequency can also be locked to these signals.
Level: Unit will lock to 1x wordclock and 10 MHz squarewaves and sinewaves having a
peak value of 0.5 V to 5.0 V.
Connector: BNC female, grounded to chassis, non-terminating to allow reference signals to
be looped through via an external BNC “tee” connector (not supplied).
Composite Baseband Outputs
Number of Outputs: 2 x analog; 1 x AES3
Subcarrier Modulation Mode: Standard double sideband mode or compatible single side-
band/vestigial sideband mode with SSB/VSB crossover at 150 Hz. SSB/VSB mode adds
approximately 12 ms of delay to the composite output signal.
Configuration: Two analog outputs, each with an independent software-controlled output
level control, output amplifier and connector.
Source Impedance: 0

voltage source or 75

, jumper-selectable. Single-ended, floating
over chassis ground.
Load Impedance: 37

or greater. Termination not required or recommended.
Maximum Output Level: +12.0 dBu (8.72 Vp-p).
Minimum Output Level:
–12 dBu (0.55 Vp-p) for 0.5 dB adjustment resolution.
Pilot Level: Adjustable from 6.0% to 12.0%, software controlled.
Pilot Stability: 19 kHz, ±0.5 Hz (10 degrees to 40 degrees C).
D/A Conversion: 24-bit
Signal-to-Noise Ratio: <= 85 dB (Bypass mode, de-emphasized, 20 Hz - 15 kHz band-
width, referenced to 100% modulation, unweighted).
Distortion: <= 0.05% THD (Bypass mode, de-emphasized, 20 Hz - 15 kHz bandwidth, ref-
erenced to 100% modulation, unweighted).
Stereo Separation: At 100% modulation = 3.5Vp-p, > 60 dB, 30 Hz - 15 kHz. At 100%
modulation = 1.0 - 8.0 Vp-p, > 55 dB, 30 Hz - 15 kHz.
Crosstalk-Linear: <=
–80 dB, main channel to sub-channel or sub-channel to main channel
(referenced to 100% modulation).
Crosstalk-Nonlinear: <=
–80 dB, main channel to sub-channel or sub-channel to main
channel (referenced to 100% modulation).
38 kHz Suppression: > = 70 dB (referenced to 100% modulation).
76 kHz & Sideband Suppression: > = 80 dB (referenced to 100% modulation).