Orban OPTIMOD-FM 8600, Operating Manual

Page: 316 / 397

6-4
TECHNICAL DATA ORBAN MODEL 8600
Wordclock/10 MHz Sync Reference Input (MPX hardware only)
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 singe-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; 2 x AES3 (MPX hardware only)
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
Ω
voltage source or 75
Ω
, jumper-selectable. Single-ended, floating
over chassis ground.
Load Impedance: 37
Ω
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-Non-Linear: <= –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).
Pilot Protection: 60 dB relative to 9% pilot injection, ±250 Hz (up to 2 dB composite pro-
cessing drive).
Subcarrier Protection (60-100 kHz ): > = 70 dB (referenced to 100% modulation; with up
to 2 dB composite limiting drive; measured with 800 line FFT analyzer using “maximum
peak hold ” display).
57 kHz (RDS/RBDS) Protection: 50 dB relative to 4% subcarrier injection, ±2.0 kHz (up to
2 dB composite processing drive)
ANALOG COMPOSITE OUTPUTS .
Connectors: Two BNC, floating over chassis ground, EMI suppressed.