User's Manual

Page

Next Generation

Signal Enhancement

• Place short between the center conductor and outer shield using

a piece of wire temporarily and check the other end of conductor

for any break in the RF cable.

3. Mount the DB6MR20 unit on the intended wall surface using the

appropriate screws.

4. Install the indoor coverage antenna according to the antenna

manufacturer’s instructions. Connect the RF cable between the indoor

antenna and the “MS” port on the DB6MR20 unit.

5. Install the donor antenna (Outdoor antenna) according to the antenna

manufacturer’s instructions. Connect the RF cable between the donor

antenna and the “BTS” port on the DB6MR20 unit.

8.5. Gain Settings

The repeater gain is one of the vital parameters since it also decides the

area to be provided with RF coverage. The noise contribution has to be

minimum while the gain is set.

Signals received by DONOR antenna from BTS and transmitted to the

repeater are termed as DL/Forward signals and the signals originated by

mobile users and intercepted by SERVER antenna for application to

repeater are termed as UL/Reverse signals.

a. Forward Gain Setting

The process of setting the forward gain is carried out automatically (in

automatic mode) through software depending on the threshold settings for

RSSI & maximum RF power.

In manual mode, the setting is carried out through software by observing

the forward signal level strength with any mobile handset loaded with

engineering software.

Alternatively, RSSI can also be observed through LEDs provided on the top

of the cover of repeater.

Once the RF output power has been determined, the attenuation will have

to be modified to reach the desired output signal level.

The gain of repeater can be set using any of the following methods:

a. Local USB serial interface mode (GUI based)

b. Remote through (optional) wireless modem.

b. Reverse Gain Setting

For reverse gain setting, 31dB variable attenuator is inserted in

accordance with the attenuation inserted in the DL.