Input And Output Connections; Cable - Orban OPTIMOD-FM 8500S Operating Manual

2-5
OPTIMOD-FM DIGITAL INSTALLATION
left, mono-right, mono-sum), selecting analog, digital or digital+J.17 input, over-
shoot compensation, SCA modulation compensation, and clock synchronization. (See
Remote Control Interface Programming on page 2-42.) The 8500S remote control ac-
cepts a DB-25 connector.
The Ethernet Port accepts a 10Mb/second or 100Mb/second Ethernet connection
terminated with an RJ45 connector.
Digital AES3 Input and Outputs are provided to support two-channel AES3-
standard digital audio signals through XLR-type connectors.
Analog Inputs and Outputs are provided to support left and right audio signals
through XLR-type connectors.
Two Composite Baseband Outputs are provided, each with independent output
level control. Each output uses a BNC connector.
Two SCA Inputs are provided for stations that use additional subcarriers (SCAs).
Each input uses a BNC connector. The second SCA input can be reconfigured via an
internal hardware jumper as a Pilot Reference Output useful for RDS (RBDS) subcar-
rier generators that require an external sync reference.
An AES3id input on a BNC connector accepts AES3 and AES11 sync signals. This in-
put becomes the input to your Optimod's stereo encoder when DO2 F is set to
EEDS
, allowing a ratings encoder to be inserted between the output of the audio
R
ATINGS
processing and the input to the stereo encoder. This maintains consistently high au-
dio drive levels into the ratings encoder while allowing the 8500S's composite limiter
to be used
A Wordclock/10 MHz Sync Reference Input on a BNC connector allows you to
lock the 8500S's internal clock generator (which determines the clock frequency ap-
plied to the DSP) to a reference signal. Typically, the reference signal comes, directly
or indirectly, from a GPS-derived frequency standard or a rubidium frequency stan-
dard. You can lock the 8500S's DSP clock to this reference, which in turn locks the 19
kHz pilot tone to the reference. This is useful in single frequency networks to pre-
vent beating between various transmitters' pilot tones in areas of mutual interfer-
ence.

Input and Output Connections

Cable

We recommend using two-conductor foil-shielded cable (such as Belden 8451 or
equivalent) for the audio input and output connections because signal current flows
through the two conductors only. The shield does not carry signal and is used only
for shielding.