Orban OPTIMOD-FM 8500S Operating Manual page 286

6-4
TECHNICAL DATA
AES3id Input
Configuration: The Wordclock/10 MHz Sync Reference can also be configured as an
AES3id digital audio input to drive the input of the stereo encoder. This facilitates a "rat-
ings encoder loop-through" connection, where the input of the ratings encoder is driven
from one of the 8500S's AES3 outputs and the encoder's output is returned to the AESid
input.
Connector: BNC female, grounded to chassis, terminated with 75Ω. For short cable runs,
there is usually no problem in driving this with an AES3 (110Ω) signal. If the cable is long
enough to cause digital audio reception errors due to impedance mismatch, a
110Ω/75Ω transformer should be placed in-line.
Composite Baseband Outputs
Configuration: Two outputs, each with an independent software-controlled output level
control, output amplifier and connector.
Source Impedance: 0Ω voltage source or 75Ω, jumper-selectable.
Load Impedance: 37Ω or greater. Termination not required or recommended.
Maximum Output Level: +16.0 dBu (13.82Vp-p).
Pilot Level: Adjustable from 6.0% to 12.0%, software controlled.
Pilot Stability: 19 kHz, ±1.0 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: <= 0.02% THD (Bypass mode, de-emphasized, 20 Hz – 15 kHz bandwidth, ref-
erenced to 100% modulation, unweighted).
Stereo Separation: >50 dB, 20 Hz – 15 kHz; 60 dB typical.
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 proc-
essing 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).
Connectors: Two BNC, shell connected to chassis ground, EMI suppressed.
Maximum Load Capacitance: 0.047 microfarad (0Ω source impedance). Maximum cable
length of 100 feet/30 meters RG–58A/U.
Filtering: RFI filtered.
Subcarrier (SCA) Inputs
Configuration: Two subcarrier inputs sum directly into composite baseband outputs;
COMPx LVL control settings have no effect on the absolute subcarrier levels.
Impedance: 600Ω
ORBAN MODEL 8500S