3085-rwt & 3085-rwr.ib.doc
Page 5 of 10
18-07-02
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.
Power:
AC mains supply: Ensure that operating voltage of unit and local supply voltage match and that correct rating fuse
is installed for local supply.
DC supply:
Ensure that the correct polarity is observed and that DC supply voltage is maintained within the
operating range specified.
Earthing:
The earth path is dependent on the type of frame selected. In every case particular care should be taken to ensure that
the frame is connected to earth for safety reasons. See frame manual for details.
Signal earth:
For safety reasons a connection is made between signal earth and chassis earth. No attempt should be
made to break this connection.
Installation in frame or chassis:
See details in separate manual for selected frame type.
RWT-3085 LASER transmitter module
The RWT-3085 is factory aligned for an optical output level of -9 dBm to -7 dBm and an optimum RF input level of
0 dBm into 75 Ohms.
Installation requires the unit to be plugged into the front of the mounting frame and the rear assembly to be secured
to the rear panel of the mounting frame, to install a module in the frame please see instructions under selected frame
type in the relevant manual describing the frames.
RF signal connection is made to the BNC connector on the rear panel of the RWT-3085.
Optical signal connection is made to the optical connector on the rear of the RWT-3085.
Extreme care must be
taken to ensure the cleanliness and consequently the best return loss of the optical connections.
The RF input signal sensitivity is set by a 75 Ohm to 50 Ohm matching pad consisting of R 1, R 2 and R 3. The
attenuation of the pad is 15 dB. This pad can be changed to a minimum of 6 dB to increase the sensitivity of the RF
input circuit of the RWT-3085.
DANGER
Avoid direct exposure to beam
Peak power
1 mW
Wavelength
1300 nm
Invisible LASER radiation-
Class 1 LASER Product
IRT
Communications
www.irtcommunications.com