Originally Posted by ofd8001
If you could post a picture of the radio used by your wife, which shows the antenna, it could provide a clue. It might help us narrow down whether the frequncies are in the 800, 450-470 or 150 range. That's not a guarantee however.
The OP already stated they are Motorola CP100's. CP100's only do VHF and UHF, specifically, 150-160MHz or 461-470MHz.
The radios are pre-programmed with 56 selectable channels in the UHF band or 27 channels in the VHF band. They do PL and DPL, but this won't matter to his scanner. They don't do repeater splits.
This isn't too hard to figure out, a scanner that will do a search between 150-160 and 461-470 will do the trick. The other option is to program in the channels and just scan them. It's not an insurmountable task.
Looking up the FCC ID number would work, but so would just looking at the antenna on the radio. If they are the stock Motorola antennas, they'll have VHF or UHF clearly marked on the base.
The CP100 is available for download from the Motorola website: CP100 Portable Two-Way Radio - Motorola Solutions USA
The selectable pre-programmed frequencies are listed starting on page 36.