Yes you can. You can also store multi Motorola trunked systems (or multi-site Motorola) in the same bank. Use CC's only and separate each systems CC's with an FM frequency. This freq does not need to be usable. I.e. below:
Code:
Richmond 01 151.15250 MOT 0.0
Richmond 02 152.03750 MOT 0.0
Bank 1 Ch 02 1300.00000 FM 0.0
Petersburg05 152.53250 MOT 0.0
Bank 1 Ch 04 1300.00000 FM 0.0
Louisa Cou01 152.02250 MOT 0.0
Louisa Cou04 158.84250 MOT 0.0
No, the scanner needs to sample the change between active CC groups. An active FM frequency can be used, but then it may interfere with the trunking effort.