Repeater maximum output power. A number of manufacturers in order to obtain greater coverage, the Repeater maximum output power production up to +43 dBm, it is not necessary. Take a large output power +33 ~ 38dBm more appropriate. Repeater coverage depends on the first reverse channel low-noise amplifier performance, not on the Repeater maximum output power. The second in the actual installation, the repeater output power is difficult to achieve +30 dBm or more. In open areas, the local surface to receive base station signal level below-95dBm, consider the installation of the repeater. Assuming the donor antenna mount high 30m, due to the highly improved, the air in the received signal level -65 ~-70dBm or so, plus the donor antenna gain, repeater inputs are expected to receive -50 ~-55dBm signal, if the Direct station gain of 80dB, the repeater output power can reach +25 ~ 30dBm. But in the actual installation, the tower height as the reason, isolation is limited, difficult to achieve 80dB gain repeater above, the Repeater maximum output power indicator set too high practical significance. The wind and relative humidity will influence the shielding effect of Cellular Phone Jammer.
Reverse channel receiver should have the role of diversity reception. CDMA systems have strict power control, at a very low signal to noise ratio at work. As the mobile transmit power is far lower than the base station, repeater reverse channel low-noise amplifier performance is good or bad is very important. Using diversity reception will help to improve the performance of the reverse channel. Normal conditions (without repeater) mobile emission level less than +15 dBm. After joining the repeater, the transmit power of mobile phones to be much larger than normal, and sometimes the reception level at -95 ~-100dBm, the mobile phone output as high as +23 dBm. This is mainly added repeater, the signal to noise ratio for the deterioration in the reverse path. As the largest mobile phone output is +23 dBm, so the repeater's coverage depends on the performance of low-noise amplifier. The field strength difference between the indoor space and outdoor space will damage the effect of mobile phone jammer.
Isolating the cell phone jammer: turn on the power supply switch of the main machine after confirming the antenna connects with the power supply; the power supply indication light is on; after 30s, the cell phone will display no signal or no network.
