User Manual of
Dual Band Adjustable Repeater
RF37GS-PS7080
Guangzhou RFtoo Co., Ltd.
9
/
16
www.rftoo.com
system design engineer with proper RF planning tool.
3. Route the feed lines from the donor antenna to the REPEATER and service
antennas to the REPEATER following the system design documents. Connect
the feed line to donor antenna, and feed line to service antenna. Waterproof
the connections. Do not connect the feedlines to the REPEATER.
4. Verify isolation between donor antenna and service antennas.
If a network analyzer
is available, it is recommended to verify the isolation between the donor antenna
and service antenna by bypassing the REPEATER and testing the transmission
between the port of the feedline to donor antenna and the port of the feedline to
service antenna. Minimum of 90dB is preferred. If the isolation is less than 85 dB,
report to your project manager and system design engineer. Relocate the donor
antenna, or service antenna might be necessary. If both options are not applicable,
then the REPEATER gain needs to be adjusted to avoid self-oscillation which
needs approval from the project manager and system design engineer, refer to
step 10
5. Adjust the donor antenna orientation.
5.1 If spectrum analyzer or other equivalent RF signal strength measurement
equipment is available (Highly recommended):
5.1.1
Set the spectrum analyzer's frequency range, bandwidth and other
parameters.
5.1.2
Connect donor antenna to the input port of spectrum analyzer.
5.1.3
Adjust donor antenna direction until -45dBm to -55dBm signal strength is
measured.
5.1.4
Connect the donor antenna port to the REPEATER ‘BS’ port.
5.2 Install the donor antenna without spectrum analyzer:
In case spectrum analyzer or other equivalent RF signal strength measurement
equipment is not available, the “Alarm” indicator on the front panel can be used to
adjust the donor antenna direction. When signal strength received from the donor
antenna is lower than -48dBm, the indicator is green; when the received signal
strength is higher than -35dBm, the indicator is red; when the received signal
strength is between -45dBm and -38dBm, the indicator is orange. It is suggested
to adjust the direction of the donor antenna to make the indicator just change
from green to orange which indicates the received signal strength is around
-48dBm.
5.2.1
Adjust the donor antenna direction until the “Alarm” indicator just change
from green to orange.
5.2.2
Connect the donor antenna port to the REPEATER “BS” port.
