IRT-6630-DTR
I.R.T. Communications Pty Ltd | www.irtcommunications.com
Page 9 of 22
Revision 01
INSTALLATION
Pre-installation:
Handling:
This equipment may contain or be connected to static sensitive devices and proper static free handling precautions
should be observed.
Where individual circuit cards are stored, they should be placed in antistatic bags. Proper antistatic procedures
should be followed when inserting or removing cards from these bags.
Installation in openGear® frame:
See details in separate manual downloadable from the openGear® website (
www.opengear.tv
).
Signal Connections:
The default setting of the IRT-6630-DTR is to automatically operate at either
2.97 Gb/s 3G-SDI
,
1.485 Gb/s HD-SDI
or
270 Mb/s SD-SDI / ASI
signals and does not require any adjustment prior to use, with the exception of DIP switch
options described in the
Configuration
section of this manual that also allow SD only, HD/SD only or reclocker
bypass modes of operation. Note that in order for DIP switch settings to have any effect, SIP switch SW1-7 must be
in the OFF position, else all configuration settings are made via DashBoard™ or SNMP software control.
The transmitter and receiver sections of the IRT-6630-DTR act independently from each other in that the signal
rates are both independently set.
The serial digital signal connections are made to the BNC connectors on the rear panel. IN 1 is the primary input to
the transmitter section of the IRT-6630-DTR. With DIP switch SW1-6 OFF, IN 2 becomes the secondary input and
will switch in automatically on loss of a valid input to IN1. Upon restoration of a valid signal to the IN 1 port, the
optical transmitter automatically restores back to the signal on the IN 1 port. With SW1-6 ON, automatic
changeover is disabled and IN 2 is ignored.
With DIP switch SW1-8 OFF, the OUT 1 BNC connector acts as an optical receiver section output. OUT 2 is always
an output of the optical receiver section.
With DIP switch SW1-8 ON, the OUT 1 BNC connector acts as a monitor port for the transmitter section. It will
monitor either the IN 1 or IN 2 input depending on which input is actually feeding the optical transmitter.
Fibre Optic Connection:
Optical connections are made to the panel adapter mounted on a bracket at the rear of the module. Care must be
taken to provide a clean surface on the optical connectors and in inserting the plug on the external fibre to prevent
damage to the alignment ferrule of the panel adapter. Type of fibre used must be single mode type.
The standard configuration for the IRT-6630-DTR has separate LC/PC optical connectors for the transmitter and
receiver sections. The transmitter optical output connector is the upper half of the optical connector, whilst the
receiver optical input connector is the lower half.
If the IRT-6630-DTR is fitted with the optional 1300/1550nm wave division multiplexer (WDM), only one common
optical SC/PC connector is provided with both transmit and receive functions occurring on a single fibre. When
operating the IRT-6630-DTR as a pair with the WDM option fitted, one unit must be fitted with a 1310nm (or 1260-
1360nm) optical transceiver and the other with a 1550nm (or 1520-1600nm) optical transceiver.
Note that for path lengths ≤ 9 dB for APD detectors, or ≤ 3 dB for PIN detectors, an optical attenuator must be
used to avoid over driving the receiver part of the transceiver. For the standard IRT-6630-DTR with no WDM option
fitted, an external optical attenuator is supplied as standard with the unit. For IRT-6630-DTR’s fitted with a WDM
device, only the 1550nm version comes equipped with an external optical attenuator as it shares the same fibre
together with the 1310nm version.