6-4
TECHNICAL DATA Orban Model 8400
Connector: XLR-type, female, EMI-suppressed. Pin 1 chassis ground, Pins 2 and 3 trans-
former balanced and floating, 110Ω impedance.
Filtering: RFI filtered.
Composite Baseband Output
Configuration: Two outputs, each with an independent software-controlled output level
control, output amplifier and connector. Output 2 may be configured in software as a pi-
lot frequency reference.
Source Impedance: 0Ω voltage source or 75Ω, jumper-selectable. Single-ended, floating
over chassis ground.
Load Impedance: 37Ω or greater. Termination not required or recommended.
Maximum Output Level: +12.0 dBu (8.72 Vp-p).
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: <= 0.02% THD (Bypass mode, de-emphasized, 20 Hz – 15 kHz bandwidth, ref-
erenced to 100% modulation, unweighted).
Stereo Separation: At 100% modulation=3.5Vp-p, > 70 dB, 30 Hz – 15 kHz. At 100%
modulation=1.0 – 8.0 Vp-p, > 60 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 proc-
essing drive).
57 kHz (RDS/RBDS) Protection: –50 dB relative to 4% subcarrier injection, ±2.0 kHz (up to
2 dB composite processing 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).
Connectors: Two BNC, floating over 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: Subcarrier inputs sum into composite baseband outputs.
Impedance: 600Ω
Sensitivity: The gain from the subcarrier input to the composite output is fixed at –20 dB.
Therefore, the gain is scaled so that 1.5V peak at the subcarrier input produces 10%
subcarrier injection with reference to 3.0Vp-p=100% modulation of the FM carrier.
Connectors: Two BNC, unbalanced and floating over chassis ground, EMI suppressed.
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