User's Manual

AXELL DIGIMINI- AMERICAS REPEATER
PRODUCT DESCRIPTION AND USER’S MANUAL
24 Doc PN 4000003431 Rev. 3.8 © Axell Wireless Ltd
3.1.5 Before Connecting the Antennas or Power
Before connecting the antennas or power perform the following procedures described in this section:
• Verify isolation between the donor and mobile antennas
• Verify link between the BTS and the Repeater
3.1.5.1 Verifying Antenna Isolation between Donor and Mobile Antennas
The isolation between the Base/Donor and Mobile/Service antennas is critical. Lower isolation
can lead to high in-band ripple, oscillations and low signal quality.
The isolation between the Base/Donor and Mobile/Service antennas is critical especially for high
gain, outdoor applications.
• For proper operation of the Repeater, it is recommended that the isolation between the Donor and
Service antennas be at least 10dB higher than the Repeaters set gain.
• Insure proper vertical or horizontal distance separation between Donor and Service antennas
NOTE: Lower isolation can lead to high in-band ripple, oscillations and low signal quality.
To measure the isolation, proceed as follows:
1. Inject a known signal from a signal generator into one antenna (preferably the Donor antenna).
2. Measure the coupled output from the Service antenna, using the Spectrum analyzer and LNA if
applicable.
3. Perform this procedure across the frequency range of both the Uplink and Downlink bands.
4. Register the lower result for system operation.
3.1.5.2 Verifying Link between the BTS and the Repeater
WARNING!
PERFORM THIS PROCEDURE BEFORE CONNECTING THE ANTENNAS TO THE
REPEATER OR POWERING ON THE REPEATER. THE REPEATER SHOULD NOT
BE OPERATED PRIOR TO THE VERIFICATION OF THE OPERATING PARAMETER IN
ITS INSTALLATION ENVIRONMENT.
Before connecting the antennas or powering up the Repeater, verifying the Link
between the BTS and the Repeater
This test checks the signal strength from the BTS antenna to the Repeater.