*Default operation should be CSQ receive, CTCSS 156.7 Hz (5A) transmit. If the user can enable/disable without reprogramming the radio, the indicated CTCSS tone should also be programmed for receive, and the user instructed how and when to enable/disable. The National VHF Interoperability Channels must be programmed for narrowband operation only. Do not program them for wideband operation.
VCALL10 is a 7.5 kHz adjacent channel frequency to STATE LG MA; VTAC11 is a 7.5 kHz adjacent channel frequency to a statewide Oklahoma Department of Transportation (ODOT) frequency (151.1300 MHz); and VTAC12 is an adjacent channel frequency to remote utility monitoring on 154.45625. Adjacent-channel interference is possible on these frequencies.
6.3National UHF Interoperability Channels
The table below identifies national UHF interoperable channels available for use by emergency responders in Oklahoma.
*Default operation should be CSQ receive, CTCSS 156.7 Hz (5A) transmit. If the user can enable/disable CTCSS without reprogramming the radio, the indicated CTCSS tone should also be programmed for receive and the user instructed how and when to enable/disable.
