In anti-terrorism operations or exercise plans for dealing with emergencies, there is a relatively common dangerous scene of dismantling bombs, that is, after discovering suspected explosives or remote-controlled bombs, special police EOD personnel (or bomb disposal experts) need to be on the spot To dismantle the detonating device and prevent the further deterioration and seriousness of the situation, in order to prevent the terrorist from using the remote control to detonate the bomb maliciously during the process of dismantling the bomb, thus causing irreparable damage to the bomb dismantling personnel, it is very necessary to Turn on the remote bomb jammer at the bomb disposal site. The next question arises. In this case, can the remote-controlled bomb jammer use the method of first detecting suspicious frequency points and then implementing jamming? Or for the sake of safety and security, directly conduct full-band, indiscriminate signal interference on the bomb disposal site?

The method of detecting suspicious frequency points mentioned here refers to a set of signal receiving and analyzing devices specially used for scanning and receiving radio communication signals. It firstly receives and scans all the normalized wireless communication signals in the target area. Then, the frequency scanning analysis is carried out continuously. Once a certain sudden communication frequency point or frequency is found, the alarm signal is triggered immediately and the bomb jammer linked with it is activated at the same time, so as to instantly detect the sudden communication frequency point. Effective suppression and interference.

Through the above description, it seems that the entire operation process meets the needs of the bomb disposal work, but there is actually a very huge safety hazard: the suspicious frequency has gone through the process of detection and discovery, and then the alarm signal and the bomb jammer are activated. The process of sending the power-on signal, which must consume a certain amount of time, although this time process may be very, very short, or even reach the level of milliseconds, but there will be a time difference after all. The key to the problem is, who Can you guarantee that the signal from the remote control is not enough to effectively detonate the remote control bomb within this millisecond time difference? If the bomb is detonated, the consequences will be disastrous!

Moreover, as far as we know, there is another technical hidden danger in the signal detection and signal interference equipment in the past: if the criminals who make the remote control bomb have a high IQ and a strong enough technical level, if the remote control signal transmission and reception If the frequency point adopts multi-frequency point, ultra-wideband and fast frequency hopping transceiver, it really cannot ensure that this type of bomb jammer can effectively intercept and terminate the transmission of remote control signals 100%.