Jammers

Description[edit]

Jammers are used to deliberately disrupt communications, broadcasts, navigation systems and radar operations.

Click the name of a signal to see more detailed information, possible decoding, and additional sound and waterfall samples

Signal Name	Description	Frequency	Mode	Modulation	Bandwidth	Location	Sample Audio	Waterfall image
Chinese Firedrake Jammer	Commercial AMAmplitude Modulation Broadcast jamming signal that plays Chinese folk songs to jam specific radio stations in Asia from being received by listeners.	6 MHzMegaHertz (MHz) 10^6 Hz — 18 MHzMegaHertz (MHz) 10^6 Hz	AMAmplitude Modulation	AMAmplitude Modulation	10 kHzKiloHertz (kHz) 10^3 Hz	China
Chinese Multitonal Jammer	Chinese radio jamming signals intended to disrupt/censor broadcast communications.	9.045 MHzMegaHertz (MHz) 10^6 Hz	USBUpper Side Band Modulation (Radio, referring to reception and modulation mode)Universal Serial Bus (Computer, referring to USB Ports and cables)	PPMPulse Position Modulation	10 kHzKiloHertz (kHz) 10^3 Hz	Worldwide
Cuban Jammer	Cuban jammers jam the frequencies of Radio Martí, Radio Republica and occasionally WRMI radio.	5.98 MHzMegaHertz (MHz) 10^6 Hz — 13.82 MHzMegaHertz (MHz) 10^6 Hz	DSBDual Side Band Modulation		10 kHzKiloHertz (kHz) 10^3 Hz	Cuba
Iranian 'Bubble' Jammer	Iranian broadcast jammer with characteristic sound. Used to suppress Radio Farda and other independent stations which broadcast to Iranian audience.	1.547 MHzMegaHertz (MHz) 10^6 Hz — 15.48 MHzMegaHertz (MHz) 10^6 Hz	AMAmplitude Modulation	AMAmplitude Modulation	10 kHzKiloHertz (kHz) 10^3 Hz — 15 kHzKiloHertz (kHz) 10^3 Hz	Iran
North Korean Siren Jammer	The North Korean Siren Jammer is among the signal disruption techniques employed by North Korea, commonly targeting shortwave radio stations.	4.45 MHzMegaHertz (MHz) 10^6 Hz	AMAmplitude Modulation			Pyongyang, North Korea
North Korean noise jammer	Noise jammer with a carrier than tends to switch frequencies slightly lower and higher than the main signal frequency. Commonly found on 6.6 MHzMegaHertz (MHz) 10^6 Hz	6.6 MHzMegaHertz (MHz) 10^6 Hz	AMAmplitude Modulation	AMAmplitude Modulation	7 kHzKiloHertz (kHz) 10^3 Hz	North Korea
S-Band Jammer	This is what the signal of a military S-Band (In this case 2.4 GHzGigaHertz (GHz) 10^9 Hz) RADAR and WiFi intentional interference (Jamming) device looks like. This signal is generated by a DDS system and is then used to modulate the output of a 2.45 GHzGigaHertz (GHz) 10^9 Hz magnetron (The same as in a microwave oven).	2,400 MHzMegaHertz (MHz) 10^6 Hz		Noise	100 kHzKiloHertz (kHz) 10^3 Hz — 100 MHzMegaHertz (MHz) 10^6 Hz	Worldwide	—
Vietnamese Siren Jammer	Used to interrupt AMAmplitude Modulation boardcast stations such as Radio Free Asia, Radio Đáp Lời Song Núi as well as Radio Sweden.	1 MHzMegaHertz (MHz) 10^6 Hz — 20 MHzMegaHertz (MHz) 10^6 Hz	USBUpper Side Band Modulation (Radio, referring to reception and modulation mode)Universal Serial Bus (Computer, referring to USB Ports and cables)		2.7 MHzMegaHertz (MHz) 10^6 Hz	Worldwide