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Band Identifier
This value is used as part of the channel
definition in the voice channel grant
message.
Transmit Offset
This is the offset from the radio's receive
frequency used to compute the transmit
frequency.
TX frequency = RX frequency + TX Offset
Channel Spacing
This is the spacing between consecutive
channels and is used in the computation of
frequencies based on a channel number.
Base Frequency
The radio receives frequency for channel
number 0.
NOTE
Use the Project 25 Trunking radio
RSS/CPS software to read system values
from UHF, VHF, or non-standard 8/700
MHz radio to fill in the above fields
(UHF/VHF Config screen) for a band plan.
Utilize
the
following
compute/verify the Tx Freq or the Chan No:
(CCTx or VCTx – Base Frequency) /
(Channel Spacing) = 0 to 4094
24-4.3.3 Audio Zone
This zone contains baseband audio controls
and level setting.
PRJ25 Dev
This field allows the user to set the PROJ 25
generate signal deviation.
range is 0 – 5kHz.
equation
to
The deviation
300
Fixed 1kHz
This field allows a fixed 1kHz to be enabled
and the amount of modulation, measured in
kHz deviation, to be adjusted.
External
This field allows an external input to be
enabled, and the amount of modulation
measured in kHz deviation to be adjusted.
The external input selection includes both the
BNC labeled: EXT MOD IN and the MIC
(microphone input).
24-4.4 PROJ 25 Trunking BASE Screen
Upon selection of the PROJ 25 Trunking
BASE test the screen zones defined in section
24-3 will display parameters associated with
Project 25 Trunking BASE testing.
The BASE test performs a duplex operation
were the analyzer will transmit a C4FM (only)
1011 Hz test pattern, and will receive either
C4FM or LSM 1011 Hz test pattern. It also
provides an averaging wattmeter function on
the received RF signal.
24-4.4.1 Display Zone
The display zone consists of a single section
with several fields that relate to BASE testing.
A description of each field is as follows.
Meter
The meter provides the standard PROJ 25
Trunking meter selections and a start test/stop
test softkey. This softkey allows the user to
initiate the duplex test operation. When the
test has been started the analyzer will begin
transmitting a 1011 Hz test pattern on the
generate frequency from the RF zone. Once
the test has been started the start test/stop test
softkey displays:
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