User Manual

AXELL CSR 3604-3304 UHF REPEATER
PRODUCT DESCRIPTION AND USER’S MANUAL
V DOC PN 3633B-UM Rev. 2.1 © Axell Wireless Ltd
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 5 W,
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 – (27dBm - cable losses in dB).
For example:
No. of Antennas
Cable Losses
Max Allowed Antenna Gain
1
2
39.1 - (27-2) = 14.1dBi
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 CSR3x04 series of signal boosters have a noise level of -55 dBm in 10 kHz
measurement at 1 MHz spectrum outside the passband of the signal booster and an in-band
noise level at around -50 dBm in a 10 kHz bandwidth. Therefore, the noise at the antenna
input port should be calculated based on equation (3).
Equation (3) - Input Noise to service antenna
Input Noise to service antenna:
-55 dBm + Service Antenna gain – Antenna splitter losses in dB – cable loss in dB