ST 169 Tester of cell phone and wireless jammers

ST 168 has been created especially for measuring of radio emission jammers intended to suppress signals of the CDMA 450, GSM, 3G, DECT, WLAN, BLUETOOTH standards.

FEATURES:
• Selective detection of radio signals in the frequency ranges of selected standards
• Base stations-to-jammer signals comparison
• Suppression ratio selection

Product Description

The device makes it possible to locate the real area of suppression and verify that the frequency range of jammer correspond to frequency bands of controlled standards.

ST169 measure and evaluate the level of base stations’ and the jammer signals, and visually displays the result it both numerically and in graphically. By comparing the signals and inform the user can evaluate both the quality of the suppression and level of personal security.


The system was developed due to the following reasons:

• It is necessary to find jammer coverage area borders and verify that the frequency range of jammer correspond to frequency bands of local operators.
• Mobile providers can periodically change a location or a quantity of base stations, which leads to a change in a signal strength and (or) a frequency band.
• It is obligate to promptly detect jammer failure.

The cell phones using CDMA 450, GSM, 3G and 4G mobile technology standards are separated in frequency receive and transmit paths. A jammer is an instrument used to prevent cell phones from receiving signals from base stations. To reliably suppress communication between the base station and the mobile device the jamming signal level must exceed the level of the received base station signal by a certain value (“suppression factor”).

So, to estimate the effectiveness of the jammer, it is necessary to measure the signal strength of base stations of all providers in the monitored area as well as the signal strength of the jammer in the all frequency bands which are supposed to be suppressed.


Product specifications

Frequency range 463 – 467.5 MHz
935 – 960 MHz
1800 – 1900 MHz
2125 – 2170 MHz
2400 – 2485 MHz
2600 – 2680 MHz
5150 – 5825 MHz
Sensitivity 935 – 960 MHz – 75 dBm
1800 – 1900 MHz – 85 dBm
2125 – 2170 MHz – 65 dBm
2400 – 2480 MHz – 66 dBm
Average dynamic range 65 dB
Display Color OLED 169х128
Power supply Li-Pol battery 3,6 V
Average current consumption 500 mA
Dimensions 90 x 54 x 21 mm