User's Manual

Page 15 of 21

IDEN Digital Repeater Installation

Manual

11 INSTALLATION STEPS

1. Install all antennas and connect them to the BDA inputs.

2. Set “MAX Gain” according to isolation (at least 15 dB lower) and available donor power.

This allows the SAGC to smartly limit the output power of the BDA.

Optional: The SAGC on the Downlink path guarantees constant downlink power (relative to

cell traffic) when and if the Donor power changes.

3. Uplink will set ultimately according to the downlink gain.

4. Check that the uplink FWD power, if power is at constant maximum then isolation between

antennas is low (BDA oscillations) or the BDA is faulty. In such a case:

• Disconnect one of the cables from the BDA connectors and connect a load at the connectors.

•

If the

FWD power is at constant maximum

then the BDA is faulty (oscillating) and

needs replacing.

•

FWD power isn’t at constant maximum

then the isolation between the donor and remote

antennas is low. Either improve the isolation (e.g. increase separation) or reduce BDA gain.

• To reduce gain, reconnect the antenna cables. Reduce the

“MAX Gain

FWD power isn’t at

constant maximum

. Reduce the gain further by 10 dB.