SHDFTRM
OPERATION
SHDFTRM
Version 1 Issue 1
180203
5
Connected to the single output of the laser
transmitter is an optional passive optical splitting
device providing up to four identical optical outputs.
The options for this split are either a four way
splitter, a two way splitter, or a single output.
Selection between these options depends on the
rear interface fitted and does not affect the main
board part of the module. Even in the case of the
four way splitter the optical power available from
each of these outputs is sufficient to transmit a SDI
signal over distances greater than 20km. A re-
clocked active loop-through of the electrical SDI
bitstream input is available from a BNC connector
for monitoring purposes. Three optical power
options, including two wavelength variants are
available as laser options. The different
wavelengths are provided for Wavelength Division
Multiplexing (WDM) options on this board. The
receiver section of the transceiver main board
accepts a single optical high definition serial digital
(SDI) bitstream input via a SC/PC singlemode fibre
optic connector. The re-clocked electrical SDI
signal output from the receiver is split to provide
four identical coaxial SDI outputs for the user at the
backpanel of the interface card. (Note: In Async
mode the signal is only amplified.) When used in
conjunction with a System HD optical transmitter
(and depending on the fibre interconnect used) the
sensitivity of the optical receiver is sufficient to
recover a signal transmitted from up to 20km away.
The receiver device is capable of recovering
wavelengths between 1.2µm - 1.6µm making it
suitable for wavelength division multiplexing
(WDM) applications. By using the ‘WDM’ interface
card, the transceiver card allows simultaneous
transmission/reception of two different
wavelengths, 1.3µm and 1.5µm. LEDs mounted at
the front of the main board allow monitoring of the
receiver performance. More detailed performance
information can be obtained via the RollCall
interface. The ‘standard’ rear interface card option
offers four optical outputs for the transmitter section
of the transceiver. However, depending on the
application, two or single output options are also
available as well as a ‘WDM’ interface card. It is
recommended that the System HD Order Code of
the board and interface card combination is
recorded in this manual on the next page using the
table on this page for your own reference. This will
allow easy identification of the laser option chosen
and the type of interface card selected when
referring to this manual at a later date.
Quick guide to order codes
:
SHDFTRM
X
W Q
X
Laser properties
Laser device
option code
Wavelength
λ
(
µ
m)
Laser output
power before split
Po (dBm)
0
1.3
-2
1
1.3
0
6
1.5
0
Interface card
option code
Interface card supplied with
main transmitter board
4
1x4 splitter on Tx out
2
1x2 splitter on Tx out
0
Patch cord (no split) on Tx out
A
‘WDM’ Mux fitted: 1.3
µ
m OUT
1.5
µ
m IN
B
‘WDM’ Mux fitted:
1.5
µ
m OUT
1.3
µ
m IN
Codes other than those listed refer to custom laser
options. Additional information should have been
delivered with the module.
NOTE…
All the laser transmitters used on ‘System HD’
optical boards are CLASS 1 LASER PRODUCTS.
Laser
options
Interface
options
