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INSTALLATION AND OPERATION INSTRUCTIONS
INTRODUCTION
Thank you for purchasing your American Fibertek Series 985D-SL singlemode eight channel
video multiplexer with two channels of multi-protocol data and remote diagnostic interface.
Please take a few minutes to read these installation instructions in order to obtain the maximum
performance from this product.
FUNCTIONAL DESCRIPTION
The RR-985D-SL operates as half of a receiver / receiver pair for the transmission of eight
channels of high performance 10 bit digital NTSC, PAL, RS170, or RS343 video signals. The
RR-985D-SL also supports combinations of up to two bi-directional RS422, RS232, or RS485
data channels or two Manchester data channels. The RR-985D-SL is designed to operate with
the RT-985D-SL video transmitter with bi-directional data over one singlemode fiber optic cable.
The RR-985D-SL detects and demultiplexes an optical serial data stream containing eight video
signals along with two data signals at 1310 nm wavelength. The RR-985D-SL also multiplexes
two data input signals into a high speed serial data stream. This serial data stream modulates a
laser at 1550 nm wavelength. The 985D-SL Series product is designed to operate on 9 um
singlemode fiber over an optical loss budget range of 0 to 15dB. Refer to the data sheets for
detailed performance specifications.
The individual components that make up the RR-985D-SL series unit are combined in a rack
mount configuration that is inserted into the SR-20D subrack. The RR-985D-SL consists of a
RR-980D-1510, a RR-CWDM-4, and a RR-482D-1470/1490. The RR-980D-1510 unit
demultiplexes one distinct singlemode wavelength of 1510 nm into eight video outputs. The RT-
482D-1470/1490 transmits and receives up to two bi-directional RS422, RS232, or RS485 data
channels or transmits two Manchester data channels using the 1470 nm and 1490 nm
wavelengths. The RR-CWDM-4 unit optically demultiplexes these distinct wavelengths from one
singlemode fiber.
The RS485 data channel may be configured for 2-wire (half duplex) or 4-wire (full duplex)
operation with or without biasing. Switch selectable internal 120 ohm terminations are available
for RS422 or RS485 data.
This unit is designed for rack mounting in the American Fibertek SR-20D/2 subrack. Slide in
rack mounting, detachable terminal blocks, and LED indicators provide for easy installation and
monitoring of video, data, and optical power.
The RR-985D-SL has a built in capability to be remotely monitored through the Afinety Remote
Diagnostics System. A SR-20D/2 subrack and a RD-20D diagnostic card are required to
facilitate this feature. Please refer to the SR-20D/2 and RD-20D Instruction Manuals for proper
operation of this feature.