Installation guide

Receiver

Installation of the receiver unit is basically a repeat of the transmitter installation.

The antenna selection will depend on the distance from the transmitter site and the

results of the site survey. The standard patch supplied is suitable for distances of up

to about 1Km maximum (depending on local conditions). Other antennas are

available for distances up to about 3Km. (see table on page 9). Note: The higher gain

antenna should be fitted to the receiver.

When the antenna is in position, before finally tightening the fixings and securing the

cable, connect the receiver unit and connect a monitor to the receiver. Check the

signal strength at the receiver using the LED indicators. All three green LED’s indicate

the strongest signal but one green LED should still give enough signal for a

reasonable picture. Try adjusting the position and direction of the antenna to give

maximum signal strength.

Check the picture on the monitor. Again adjust the antenna position if required to

obtain the best possible picture. Because of reflections and multi-path, small

movements of the antenna can have a significant effect. If interference is suspected,

try changing to another channel (this must be done on both the transmitter and the

receiver).

If a high gain antenna is being used, aim the antenna in the direction of the

transmitter. Make sure that the polarization of the two antennas match. Using the

signal strength indicator or the picture on the monitor, rotate the antenna in the

horizontal plane until the best picture is achieved.

Once the best results have been obtained fix all the equipment in position.

Note: As with the transmitter installation, cable lengths should be kept to a minimum to

reduce losses. Again, consider mounting the receiver unit close to the antenna.

General

It is important that antennas are mounted correctly and securely. Remember that on a

high pole, although the antennas are relatively small, there will still be a considerable

wind loading. If in any doubt, contact a qualified aerial rigger.

It is essential that the polarization of the transmitting and receiving antenna is

matched.

Make sure that all connections are weatherproof. This can best be achieved by

covering all connectors with a layer of self-amalgamating tape. Also make sure that

cable entries to buildings are well sealed with mastic.