[QUOTE="charmin, post: 3412985, member: 230200"Obviously it was chucking out some random interference at 433 ish Mhz[/QUOTE]Almost certainly it was operating on 433.92 MHz which is the frequency allocated to licence exempt equipment.
It would be un-likely that the device would transmit continuously if the batteries were close to end of life. ( but they might ) The requirement of the licence exemption is that no device transmits for more than 10% of the time.
There is a possible reason why the temperature sensor transmitted for along period. Some systems use two way communications where a package of data from a sensor will be repeated until the panel sends an acknowledgement to the sensor. If the sensor cannot hear the panels acknowledgement the repeats may be often enough to disrupt communications in other equipment. If a third system ( not your alarm and not your temperature sensor ) has started operating nearby then transmissions from that third system could prevent the temperature sensor from hearing the acknowledgements from its display resulting it the sensor transmitting far more often that it would normally.
Discovering the exact reason for communication failures in equipment operating on a licence exempt frequency requires off air monitoring to find what systems are operating in the vicinity.
It would be un-likely that the device would transmit continuously if the batteries were close to end of life. ( but they might ) The requirement of the licence exemption is that no device transmits for more than 10% of the time.
There is a possible reason why the temperature sensor transmitted for along period. Some systems use two way communications where a package of data from a sensor will be repeated until the panel sends an acknowledgement to the sensor. If the sensor cannot hear the panels acknowledgement the repeats may be often enough to disrupt communications in other equipment. If a third system ( not your alarm and not your temperature sensor ) has started operating nearby then transmissions from that third system could prevent the temperature sensor from hearing the acknowledgements from its display resulting it the sensor transmitting far more often that it would normally.
Discovering the exact reason for communication failures in equipment operating on a licence exempt frequency requires off air monitoring to find what systems are operating in the vicinity.