American Fibertek RR-93285SL - Manual (Page 3)

3
INSTALLATION AND OPERATION INSTRUCTIONS
INTRODUCTION
Thank you for purchasing your American Fibertek Series 93285SL singlemode thirty-two
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 93285SL Series units operate as a transmitter / receiver pair for the digital transmission of
thirty-two 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-93285SL transmitter accepts up to thirty-two video inputs in four 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. This pattern is repeated for group’s three and four
using wavelengths 1550nm and 1570nm respectively. A Course Wave Division Multiplexer
(CWDM) combines these four 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-93285SL receiver converts the optical
signal into thirty-two independent video output signals and two forward data channels while
transmitting the two return data channels.
The 93285SL 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.