RADIO UPDATE:
Local news report tonight- total of 700 school bus radios have been stolen throughout the state...add Madera and southern CA...T word mentioned...each radio cost $800...a repeater was also stolen in Madera
That is interesting Selene.
Please keep the updates coming if possible.
That ups the ante a bit. A repeater functions in full duplex mode. It receives on one frequency and retransmits on a nearby frequency through the same antenna. If you change the frequencies, the tuned cavities in the duplexer will have to be retuned. At minimum, that requires a sweep generator, oscilloscope, spectrum analyzer and a frequency counter.
The good news here is that the thieves are planning to make their operation dependent on the use of a repeater. Capture the repeater and the radios configured to use it will not be able to communicate. A single transmitter keyed up on the input frequency of the repeater is sufficient for a classic "denial of service" attack on the device.