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INSTALLATION AND OPERATION INSTRUCTIONS
INTRODUCTION
Thank you for purchasing your American Fibertek MR-913D multimode video receiver with bi-
directional 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 MR-913D operates as half of a transmitter / receiver pair for the transmission of high performance
10 bit digital NTSC, PAL, RS170, or RS343 video signals. The MR-913D also supports up to three bi-
directional channels of RS485 (2 or 4 wire), RS422, RS232 or Manchester data. Switch selection
allows for multiple data configurations in one of the following three formats:
Channel 1: RS422 or RS232 data
Channel 2: RS422 or RS232 data
Channel 3: RS422 or RS232 data
Or:
Channel 1: RS422 or RS232 data
Channel 2: RS485 (2 or 4 wire) or Manchester data
Channel 3: RS422 or RS232 data
Or:
Channel 1: RS485 (2 or 4 wire) or Manchester data
Channel 2: RS485 (2 or 4 wire) or Manchester data
Channel 3: Not available in this configuration
NOTE: This unit is shipped in the following default configuration. For other configurations,
please refer to the DATA CONFIGURATION section for changes to the default switch settings.
Channel 1: RS422 data
Channel 2: RS485 (4 wire) or Manchester data
Channel 3: RS232 data
The MR-913D is designed to operate with the MT-913D or RT-913D video transmitter with bi-directional
data over one multimode fiber optic cable.
The MR-913D multiplexes up to three data signals into a high speed serial data stream. This serial data
stream modulates a laser at 1550 nm wavelength. The MR-913D also detects and demultiplexes a
return optical serial data stream signal containing a single video input signal along with up to three data
channels at 1310 nm wavelength. The 913D Series product is designed to operate over an optical loss
budget range of 0 to 12 dB. Refer to the data sheets for detailed performance specifications.
The RS485 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 contained in a rugged aluminum housing with internal dc voltage regulation. The detachable
terminal blocks and LED indicators provide for easy installation and monitoring of video, data, and
optical power.
The MR-913D is designed for mounting as a modular stand alone unit. For a rack mounted version
please see the RR-913D.
The MR-913D 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.
