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OPTIMOD-FM DIGITAL
Input/Output Configuration
The 8500S offers:
•
Up to two digital AES left/right input and outputs. (The sync reference input can
be configured for use as an AES3id input to the 8500S's stereo encoder and is
useful when implementing a ratings encoder loop-through.)
•
Two digital AES3 left/right outputs.
•
Analog left/right inputs.
•
Analog left/right outputs, which can be switched independently to carry the fol-
lowing signals: FM analog processed without diversity delay, FM analog proc-
essed with diversity delay, digital radio processed, or low delay monitor.
•
Composite stereo outputs.
•
Subcarrier (SCA and RDS/RBDS) inputs.
•
A 75Ω sync reference input that can accept 10 MHz or 1 x wordclock (32, 44.1, 48,
88.2, and 96 kHz) and lock the digital output sample rate and the 19 kHz pilot
tone frequency to this input.
•
1
An AES3id
sync input that can also be used as an audio input in "ratings en-
coder Loopthrough mode."
Digital AES3 Left/Right Input/Output
The digital input and output conform to the professional AES3 standard. They both
have sample rate converters to allow operation at 32, 44.1, 48, 88.2, and 96 kHz
sample frequency.
The left/right digital input is on one XLR-type female connector on the rear panel;
the left/right digital output is on one XLR-type male connector on the rear panel.
OPTIMOD-FM provides digital and analog inputs and outputs. You select whether
OPTIMOD-FM uses the digital or analog input either locally or by remote interface.
If OPTIMOD-FM is set to accept a digital input and the feed fails, OPTIMOD-FM will
automatically switch back to the analog input.
1
The AES-3id standard defines a 75-ohm BNC electrical variant of AES3. The speci-
fied voltage level is 1 volt peak to peak. Maximum cable length is 300 meters. This
standard is also documented by the Society of Motion Picture and Television Engi-
neers as SMPTE 276M. For short cable runs, it can usually be used to interface di-
rectly with AES3 inputs and outputs. For longer cable runs, it is wise to use a 110Ω
⇔75Ωbalun transformer.
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INTRODUCTION
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Troubleshooting
