User Manual

A XELL D-MBR-USA R EPEATER
PRODUCT DESCRIPTION AND USER’S MANUAL
© Axell Wireless Ltd 27
Additional parameters (not required for initial setup) are:
• Oscillation Prevention Enable - Enables oscillation detection mechanism that
maintains repeater functionality.
• Temperature - Displays Repeater ambient temperature.
• DL Output Threshold Delta (dB) - the delta from the set Composite Output Power,
below which the alarm 'Donor power is too low' is activated.
For example, if the DL Output Threshold value is set to 8dB, when the Measured
Composite DL output power is 8dB less than the set Composite Output Power, an alarm
is generated.
• Meas. Composite DL Output Power – displays the currently measured output signal
level.
4. Configure each required sub-band (Filter) as follows and then click Send:
• Check the Enable box to activate the sub-band. The configuration parameters in that
row will be available.
• Set the Start and Stop DL Frequency (MHz) in the corresponding fields. (The UL
frequencies are automatically defined according to the DL values).
The defined BW will be displayed in the BW KHz column (to the left of the Start
Frequency).
Be sure to choose Start/Stop values that provide the appropriate BW (i.e. for LTE
1.4MHz, 3MHz, 5MHz, 10MHz or 15MHz).
• Set the (Downlink) Max Gain as follows: by default, the MAX Gain (DL) parameter
is set to its highest level (82dB). Change the Channel Max Gain (DL) according to
the measured/calculated input power and isolation measurements.
The recommended Maximum Gain setting is approximately 15 dB less than the isolation
between the service and donor antennas.
5. If the site NOISE LEVEL is high enough to cause interference, adjust the noise level as follows:
• Adjust the Gain Delta parameter – this sets the delta between the uplink and
downlink gain (so the uplink gain is relatively lower than the downlink gain.
• Click Send. The defined sub-band will appear in the display in the appropriate area.
• Repeat the procedure until the desired coverage is achieved.
6. More information on parameters for the selected sub-band:
• DL Set Ch. Max. Gain Sets the power for the antennas. The value is about 15 dB
less than the isolation between the donor antenna and the mobile antenna.
The Value defined in the DL path is reflected in the UL path, however to define different
UL and DL path values the Gain Delta parameter is used and its defined value is added
to the UL value.
• DL Measured RSSI - measured DL signal.
• DL Measured Ch. Gain - measured DL Gain (dB) for the selected sub-band.
• DL Measured Ch. Power - measured Power (dBm) for the selected sub-band.
• UL Gain ∆ - used for noise control. Sets the difference between UL and DL gain.
• UL Measured Ch. Gain - measured UL Gain (dB) for the selected sub-band.
7. Click Send (top window area option).
8. After the channels have been configured and the required coverage is attained for the location,
verify that no Alarms are generated: