American Fibertek RR-91685SL - Manual (Page 3)

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INSTALLATION AND OPERATION INSTRUCTIONS
INTRODUCTION
Thank you for purchasing your American Fibertek Series 91685SL singlemode sixteen channel
video multiplexer with bi-directional multi-protocol data. Please take a few minutes to read these
installation instructions in order to obtain the maximum performance from this product.
FUNCTIONAL DESCRIPTION
The 91685SL Series units operate as a transmitter / receiver pair for the digital transmission of
sixteen simultaneous NTSC or PAL video signals along with two channels of field configurable
bi-directional data over one singlemode fiber optic cable. These data channels may be
configured as RS485 data, RS422 data, RS232 data, or Manchester data. The RS485 channel
may be configured for 2-wire (half duplex) or 4-wire (full duplex) with or without biasing. Switch
selectable internal 120 ohm terminations are available for RS422 or RS485 data.
NOTE: This unit is shipped with Data Channel 1 and Data Channel 2 in the RS485 4-wire
configuration. For other configurations, please refer to the DATA MODE section for
changes to the default switch settings.
NOTE: This unit is shipped with data terminations off and data bias off for Data Channel
1 and Data Channel 2. For other configurations, please refer to the DATA TERMINATION /
BIAS section for changes to the default switch settings.
The RT-91685SL transmitter accepts up to sixteen video inputs in two groups containing eight
videos and multiplexes each group into a high speed serial data stream. The first group’s serial
data stream modulates a laser at 1510nm wavelength. The second group’s serial data stream
modulates a laser at 1530nm wavelength. A Course Wave Division Multiplexer (CWDM)
combines these two wavelengths, along with the forward data wavelength of 1490nm and the
return data wavelength of 1470nm, onto a single optical output port for connection to the fiber
transmission system. Correspondingly, the RR-91685SL receiver converts the optical signal to
sixteen independent video output signals and two forward data channels while transmitting the
two return data channels.
The 91685SL Series product is designed to operate over an optical loss budget range of 0dB to
21dB on 9um singlemode fiber. Refer to the product specification sheet for additional
performance data.
INSTALLATION
THIS INSTALLATION SHOULD BE MADE BY A QUALIFIED SERVICE PERSON AND
SHOULD CONFORM TO THE NATIONAL ELECTRICAL CODE, ANSI/NFPA 70 AND LOCAL
CODES.