SHDFTRX
OPERATION
SHDFTRX
Version 1 Issue 5
180203
5
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 HD-
SDI signal over distances greater than 20km.
A re-clocked active loop-through of the electrical
HD-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
(HD-SDI) bitstream input via a SC/PC singlemode
fibre optic connector. The re-clocked electrical HD-
SDI signal output from the receiver is split to
provide four identical coaxial HD-SDI outputs for
the user at the backpanel of the interface card.
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 1.2-
1.6
µ
m 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
:
SHDFTRX
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
