A
XELL
BSF-4004
BSF0038
S
ERIES
R
EPEATER
PRODUCT DESCRIPTION AND USER’S MANUAL
Antenna Installation
Installation of an antenna must comply with the FCC RF exposure requirements. The antenna used
for this transmitter must be mounted on permanent structures.
The FCC regulation mandate that the ERP of type A signal boosters should not exceed 5W, this is
equivalent to 8.2W EIRP.
Therefore the max antenna gain allowed for this type of signal booster should be limited to the values
given by equation (1) for the service antenna and equation (2) for the donor antenna
Equation (1) - Max SERVICE antenna gain
Max SERVICE antenna gain (dBi) = 39.1 – (37dBm - # of antennas in dB – cable losses in dB).
For example:
No. of Antennas
Cable Losses
Max Allowed Antenna Gain
4
3
39.1 - (37-6-3) =11.1dBi
1
3
39.1- (37-0-3) = 5.1dbi
10
3
39.1- (37-10-3) = 15.1dbi
Equation (2) - Max DONOR antenna gain
Max DONOR antenna gain (dBi) = 39.1 – (37dBm - cable losses in dB).
For example:
No. of Antennas
Cable Losses
Max Allowed Antenna Gain
1
10
39.1 - (37-10) = 12.1dBi
Compliance with FCC deployment rule regarding the radiation of noise
Good engineering practice must be used in regard to the signal booster’s noise radiation. Thus, the
gain of the signal booster should be set so that the ERP of the output noise from the signal booster
should not exceed the level of -43 dBm in 10 kHz measurement bandwidth.
In the event that the noise level measured exceeds the aforementioned value, the signal booster gain
should be decreased accordingly.
In general, the ERP of noise on a spectrum more than 1 MHz outside of the pass band should not
exceed -70 dBm in a 10 kHz measurement bandwidth.
The 3604 BSF0038 Series Repeater has a noise level of -45 dBm in 10 kHz measurement at 1 MHz
spectrum outside the passband of the signal booster and an
in-band
noise level at around -45 dBm in
a 10 kHz bandwidth. Therefore, the noise at the antenna input port should be calculated based on
equation (3).
© Axell Wireless Ltd
Doc. No. PN 4004 BSF0038 Series-UM Rev. 1.0
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