Regarding MED-channel usage in New Mexico and specifically Albuquerque, most of what I find has gotten pretty old, so on the boring subject of this old analog system ...
They do use the standard MED1 through MED10 pairings, right? I ask because N.M. Admin. Code § 7.27.5.17(A)(2) says that air transport MED2 is "(2) Transmit 463.235, receive 468.025" instead of 463.025, though the rest of the table is right. It doesn't seem to have been corrected since last revised in 2006. NMHealth proposed elimination of the detailed freqs in favor of the same language used for the non-air transports, pointing to EMSCOM for guidance. That EMSCOM doc is also kind of old.
Also, that EMSCOM doc confirms that mobiles transmit on the higher freq and receive the lower, while the NMAC shows the helos doing the opposite. Since there appears to be a repeater system in use for all these channels (right?), did NMAC get this wrong, too, and do all users (helos, ambulances, hospitals) transmit high and receive low? The first pic on page 9 has the hospital backwards, though the rest is consistent with what I said. (This RX/TX misunderstanding seems to be a common mistake among people and documents, not just for NM.)
Is 136.5 the only CTCSS and do the repeaters and mobiles both transmit tone?
They do use the standard MED1 through MED10 pairings, right? I ask because N.M. Admin. Code § 7.27.5.17(A)(2) says that air transport MED2 is "(2) Transmit 463.235, receive 468.025" instead of 463.025, though the rest of the table is right. It doesn't seem to have been corrected since last revised in 2006. NMHealth proposed elimination of the detailed freqs in favor of the same language used for the non-air transports, pointing to EMSCOM for guidance. That EMSCOM doc is also kind of old.
Also, that EMSCOM doc confirms that mobiles transmit on the higher freq and receive the lower, while the NMAC shows the helos doing the opposite. Since there appears to be a repeater system in use for all these channels (right?), did NMAC get this wrong, too, and do all users (helos, ambulances, hospitals) transmit high and receive low? The first pic on page 9 has the hospital backwards, though the rest is consistent with what I said. (This RX/TX misunderstanding seems to be a common mistake among people and documents, not just for NM.)
Is 136.5 the only CTCSS and do the repeaters and mobiles both transmit tone?