Wireless alarm system are "deaf" and "dead" during the transmition with an external low power transmitter on the frequency. This problem is well known in telecommunication and is called "Radio Frequency Interference" (RFI).
: RFI muzzle any possible incoming signal from the sensors.
ALL brands, OLD or NEW are affected by RFI, the receiver is muzzled to dead and does no longer detected INTRUSION and other type of alarms.
Some smart sellers guy's try to let you believe that RFI is detected, maybe, but RFI can't be avoided and signals are muzzled. This RFI problem is well know by intruders... Did you know?
I know, RFI problems happen only to others but you..
:TEST YOURS if you have one, get a FCC/CE approved transmitter... : For all frequency types of wireless alarm systems see at:
Paul