IBUC Operation Manual
Terrasat Communications Inc.
Rev. A
4-4
to attach the PSUI to the antenna. Terrasat offers an optional mounting bracket to
simplify antenna mounting. Refer to chapter 9 for mounting hole dimensions.
The LNB is mounted directly to the OMT at the focal point of the antenna. Ensure that
proper gasketing is used when mounting the LNB to the OMT.
Installing the Indoor IFU
Tools and Test Equipment
Have on hand a standard electrician's tool kit.
Mounting Location
The Terrasat IFU dimensions are 19-inch rack width, 1RU-rack high (1.75 inches), and
8.6 inches deep. Refer to chapter 9 for detailed dimensions. Allow a minimum of 6
inches (15 cm) between the back of the chassis and the end of the rack for cable
clearance.
The IFU may be rack-mounted or placed on a flat surface. If the PSUI is to be rack-
mounted, a rack shelf or tray is recommended.
The IFU should be positioned close to other units in the network such as the satellite
modem.
Access/Airflow
Adequate space must be reserved for air movement, cable connections, and equipment
access. Do not block the airflow on the sides of the chassis. Without sufficient air
cooling, the unit may overheat.
Cabling/Lengths
Measure the distance between the satellite modem(s) and the IFU. You will need to
provide the IF interface cable between the modem TX output and the IFU TX input, as
well as the IF interface cable between the modem RX input and the IF RX output.
Ensure that the cable is capable of operating at the modem frequencies.
AC Power Connection
The IFU is designed to work at 100 - 240 VAC, 47 - 63 Hz. The IFU must be grounded
through the AC power cable (standard 3-prong equipment connection).
Current and voltage surges in the AC power input can be reduced by installing surge
protectors and AC power line filters.
Note: AC transients and surges can cause data transmission errors.
To ensure uninterrupted service, some method of backup AC power is recommended.
An un-interruptible power supply (UPS) is preferred, along with a power stabilizer or an
isolation filter to ensure clean power.
To Next Page
Loading...
