OP25's multi_rx.py can be configured to scan P25 Trunk systems such as Ohio's MARCS as well as being able to define single channel
conventional P25 receivers. There are no scanning capabilities for the conventional P25 channels, but you can certainly configure multiple
receivers.
At the least, you'd need two separate SDR's, one for the P25 system and another for the conventional P25 receiver. You may be able to share
a single SDR among two or more of the conventional P25 receivers if they are close enough in frequency to fit within the usable bandwidth
of that particular device.