US Senator Kay Bailey Hutchinson (R-TX) and US Representative Kevin Brady (R-TX) introduced a bill, namely the "Safe Prison Communications Act of 2009." The legislation will allow the director of the Federal Prisons Service, the governor, or the governor's designate (depending on whether the facility is federal or state-run) to petition the Federal Communications Commission (FCC) to request the authorization to operate signal jammer in specific correctional establishments. In deciding whether to approve the petition, the FCC will consider whether the jammer will interfere with emergency or public safety communications outside the prison walls. The jammer has an internal protection system to ensure reliable operation. The scrambling system monitors the operating mode of the transmitter module and the normal transmission of the corresponding antenna. If the operating mode suddenly changes to a dangerous value (for example, due to antenna damage, lack of cooling, etc.), the protection system stops the corresponding interference module.

The United States is spending billions of dollars vigorously fighting electronic warfare. For example, these GPS jammer emit radio waves and other electromagnetic noises to confuse the enemy's electronic signals.

GPS technology was originally designed for military applications during the Cold War in the 1960s and is considered an integral part of the daily operations of the US Air Force today. It relies on multiple applications such as navigation, target tracking, missile and projectile guidance, search and rescue and reconnaissance. However, with the widespread development of jammers designed to disrupt GPS and others Similar systems, these important guidance systems can become unusable at critical times, seriously hampering the use of aircraft. In order to prepare for this eventuality, the Air Force is reportedly looking for new methods of research and training.

The Programmable Analog Aircraft On-Board Jammer (SPACE JAM) is such a project. The system was created by Captain David Levene of the US Air Force Test Pilot School's F-15E Weapon System Officer (WSO) as part of his masters thesis project. The system uses an algorithm to integrate realistic GPS. The effect of the wifi jammer is directly injected into the aircraft's navigation system. The hardware used for SPACE JAM is inside the modified AE-4 antenna electronics, which already exist in many military aircraft, including the TPS F-16D aircraft used for this project. SPACE JAM Custom Software Interface Monitoring and Debugging Control (CMDoS) is used to control various interference situations in the cockpit, including the location of interference and signal parameters, such as bandwidth , frequency and power.