DE
DANIELS
ELECTRONICS
VT-4B150 VHF Project 25 Digital Base Transmitter Instruction Manual
2-3
2.2.2
Channel Wide Settings
There are currently 32 channels, which may be individually programmed for various parameters.
2.2.2.1
Frequency
The transmitter’s frequency may be set here. The Radio Programming Software will only allow
frequencies within the operation band (set in the Transmitter Wide options above) to be entered.
2.2.2.2
Voice/Signal Type
Allowed values are PROJECT 25, ANALOG and MIXED MODE. PROJECT 25 mode receives
digital P25 modulated signals only, while ANALOG mode receives analog FM signals only. In
MIXED MODE the transmitter will transmit either PROJECT 25 digital and analog signals,
depending on which mode of signal was received. When either ANALOG or MIXED MODE
values are selected, additional combo boxes appear to allow selection of Squelch Type for
ANALOG mode signals.
2.2.2.3
Squelch Type
This option is available for ANALOG signals only, and may be set to CSQ, CTCSS or DCS.
With the CSQ option, the transmitter will not send either a CTCSS subaudible tone or a DCS code
along with the signal being transmitted. With the CTCSS option the transmitter will send a
subaudible Continuous Tone Coded Squelch System tone along with the audio signal. Similarly,
when the DCS option is used the transmitter will transmit a Digital Controlled Squelch code with
the audio signal. When either CTCSS or DCS Squelch Type is selected, additional combo boxes
appear to allow selection of a particular tone or code.
2.2.2.4
CTCSS Tone
The frequency of the CTCSS tone may be selected here. All the thirty-nine standard frequencies
are supported, along with three non-standard frequencies.
2.2.2.5
Enable Reverse Burst
This option enables a Reverse CTCSS Burst to be sent at the end of a transmission. The Reverse
Burst signals to the receiving radio that the transmission is ending, allowing it to mute more
quickly.
2.2.2.6
DCS Code
One of eighty-six DCS codes may be selected here.
