Introduction of signal jammer work

2021-10-07

Mobile phone signal jammers are mainly aimed at all kinds of places where the use of mobile phones is prohibited, such as various examination rooms, schools, gas stations, churches, courts, libraries, conference centers (rooms), theaters, hospitals, governments, finance, prisons, public security, and military centers.
 
It is understood that mobile phone signal jammers on the market can limit mobile phone signals that are 500M meters away from the launching station and have a radius of >20 meters. The shielding radius is adjustable, it only shields mobile phone signals without affecting other electronic devices. Save electric energy, the power is 20W-480w.
When the mobile phone is working, it is within a certain frequency range. The mobile phone and the base station are connected by radio waves, and the data and sound transmission are completed with a certain baud rate and modulation method. Aiming at this communication principle, the mobile phone signal jammer scans from the low-end frequency of the forward channel to the high-end at a certain speed during the working process. The mobile phone is manifested as a search network, no signal, no service system and other phenomena.
Common mobile phone signal jammers on the market have operating frequencies: 869~894MHz; 825~960MHz; 1805~1880MHz and 1900~1990MHz, etc. The operating frequency bands are CDMA800, GSM900, DCS1800, PCS1900, WCDMA, etc. It can control a range of about 40 meters in diameter, using DC-DC converter input voltage and 5V output voltage.

1 Slow start function
After the shield is energized, the working power supply rises from zero to stable within 4 seconds.
2 Shielding function
After the start is completed, the mobile phones within the range of action are blocked within 35 seconds.
Basic performance:
Transmitting frequency range: 860-960MHZ 1.800-1.990GHZ
Operating frequency bands: CDMA800, GSM900, DCS1800, PCS1900, PHS.
Control range: about 40 meters.