User's Manual

//picture of APDU connectors with explanation//

• Mount the APDU in its predefined location.

• Connect the APDU to the grounding point.

• Connect the supply cable to the APDU DC (or AC) input with the correct

polarity.

• Connect the cable between APDU and CI.

• Connect the alarm cable between APDU and BTS to the APDU.

Phase 2

: The second phase of the installation, that is the attachment of cables between

APDU and BTS, may have to be carried out with the BTS shut down. Check with the

BTS supplier.

• Connect the supply cable to the BTS 48 V or 220 V supply.

• Connect the alarm cable to the BTS.

An example of software configuration of the TTPA is dealt with in the Software

Configuration of System chapter below.

Checklist after mounting and installation

• Check that the brackets or wall holders are properly tightened.

• Check that the grounding straps are connected and the screws tightened?

• If you are using amalgamating tape to seal off the connectors, check that this is

done.

5. Commissioning

To be added

Appendix 1. TTPA Software Settings

Optimising coverage

The TTPA can optionally be equipped with soft gain control, both for up- and down

link (i.e. receive and transmit branch). By carefully tuning the gain for each branch it

is possible to significantly improve the coverage provided by the BTS.

In order to optimise the coverage with the TTPA soft gain control it is necessary to

first characterise the particular BTS regarding the balance of the link budget, i.e. the

distance covered by the BTS transmitter compared to the talk back distance of the

mobile terminal. The unbalance, P

, and the feeder loss must be available to use the

TTPA soft gain settings in an optimum way.

If the TTPA is deployed as a retrofit, there is a good chance that such a