Codan Radio Communications UT-4-400 User Manual
DE
DANIELS
ELECTRONICS
2-8
UT-4R400 UHF Project 25 Digital Transmitter Instruction Manual
These selected Timeouts can then be used in the Timeout Value field in each Transmitter Channel
Setting. These fields are used to program the parameters for a single Transmitter channel only.
There are 32 different available channels labeled A1 - A16 and B1 - B16. The parameters for each
channel are independent of parameters in other channels.
Setting. These fields are used to program the parameters for a single Transmitter channel only.
There are 32 different available channels labeled A1 - A16 and B1 - B16. The parameters for each
channel are independent of parameters in other channels.
2.13.2
Channel Wide Settings
The Receiver may be programmed with up to 32 channels, each with a different frequency,
channel spacing and modulation type. The channels are arranged in two banks of 16 channels
each, referred to as Bank A and Bank B. In this manual, a specific channel is referred to by its
bank and channel i.e. B12 would refer to channel 12 in bank B. The following are all the settings,
which may be programmed on a per-channel basis:
channel spacing and modulation type. The channels are arranged in two banks of 16 channels
each, referred to as Bank A and Bank B. In this manual, a specific channel is referred to by its
bank and channel i.e. B12 would refer to channel 12 in bank B. The following are all the settings,
which may be programmed on a per-channel basis:
2.13.2.1
Channel Name
Each channel may be assigned a text name of up to 11 characters. The name is stored in the radio,
but is never broadcast. It is provided as a means of identifying the channel during configuration.
The channel name will default to the bank and channel number (i.e. “A1” for bank A, channel 1).
but is never broadcast. It is provided as a means of identifying the channel during configuration.
The channel name will default to the bank and channel number (i.e. “A1” for bank A, channel 1).
2.13.2.2
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.
frequencies within the operation band (set in the Transmitter Wide options above) to be entered.
2.13.2.3
Analog Bandwidth
This setting should be changed to match the channel spacing and bandwidth of the analog channel.
This setting is visible only when the Channel Type field is set to Analog.
This setting is visible only when the Channel Type field is set to Analog.
2.13.2.4
Deviation
This is a read-only field that shows the maximum amount that the transmitter frequency will
deviate. This field changes automatically in response to the Channel Bandwidth setting. A
bandwidth of 25 kHz selects a maximum deviation of 5 kHz, while a bandwidth of 12.5 kHz
selects a maximum deviation of 2.5 kHz.
deviate. This field changes automatically in response to the Channel Bandwidth setting. A
bandwidth of 25 kHz selects a maximum deviation of 5 kHz, while a bandwidth of 12.5 kHz
selects a maximum deviation of 2.5 kHz.
2.13.2.5
Channel Type
Allowed values here are Project 25 and Analog. Project 25 signaling is a purely digital mode
compatible with other APCO Project 25 radios. Analog mode is for transmitting analog FM
modulated signals. In either case, the audio at the Unbalanced Audio input is used to modulate the
transmitter. The audio signal may also be injected at the CNTL BUS jack on the front panel for
interfacing to MT-4 Interim Receivers.
compatible with other APCO Project 25 radios. Analog mode is for transmitting analog FM
modulated signals. In either case, the audio at the Unbalanced Audio input is used to modulate the
transmitter. The audio signal may also be injected at the CNTL BUS jack on the front panel for
interfacing to MT-4 Interim Receivers.