User Manual

XELL

D-MBR-USA

EPEATER

PRODUCT DESCRIPTION AND USER’S MANUAL

4.3 Signal Levels and Channel Configuration

This section provides a description of the RF Gain setting criteria (set via the Controls and Params

Pane) and a step-by-step procedure of the signal level and channel configuration procedure.

4.3.1 RF Gain Setting Criteria

The RF Gain is set automatically by the Repeater’s SALC function (section

0). The function sets the

optimum gain without exceeding the isolation limit.

The gain range is up to 80dB for all bands and is set by default to its maximum value of 80dB.

The gain will then be modified automatically to its optimum value by the SALC mechanism. This

mechanism performs gradual learning of traffic load characteristics and adjusts the Repeater RF Gain

accordingly. (See section

0 for more information on the SALC mechanism).

4.3.2 Adjusting the Signal Levels and Configuring Channels

The Control and Params (parameters) window is used to configure up to 8 channels for each band

and the RF parameters. This section describes each of the fields.

Up to 8 sub-bands referred to as filters can be defined, where each sub-band is individually defined

by setting the following:

• Bandwidth (start and stop frequency) - each sub-band can be set over specific bandwidths. For

example, LTE sub-channels can be defined over the full (upper and lower) LTE for the following

bandwidths: 1.4MHz, 3MHz, 5MHz, 10MHz or 15MHz

• Maximum power

• Maximum gain

• Gain delta

The defined sub-bands are displayed in the lower part of the screen for reference.

Refer to the Band Info tab for information on the relevant bandwidths for each frequency. If you

attempt to define a bandwidth (block) that is not appropriate for the selected frequency, the

appropriate notification will appear.

Note that the number of supported channels depends on the technology as indicated below.

Filter BW Technology Frequency bands Number of

FPGA Resources

2.5Mhz-20MHz

( in 2.5MHz steps)

CDMA 850/1700/1900 MHz 2

1.5,2.5,11Mhz CDMA 850MHz 2

1.4,3,5,10,15,20Mhz LTE 700/850/1700/1900 MHz 2

To adjust the signal levels and configure the channels

1. In the left pane (Topology Tree), select the band (LTE, CELL, etc.) whose sub-bands are to be

configured.

2. Click the Control and Params tab. The relevant window appears.

The window is divided into the following areas:

• System – overall parameters for the selected service.

• Filter definitions – used to define up to 8 sub-bands and their RF parameters.

• Sub-bands view – graphical display of defined sub-bands for the selected service.