User Manual
Table Of Contents
- 1GENERAL
- 1.1Introduction
- 1.2Interim Operation
- 1.3Manual Organization
- 1.4UT-4R400 Transmitter Family Models
- 1.5Performance Specifications
- 1.5.1General
- 1.5.2Audio Specifications
- 1.5.3Physical Specifications
- 2THEORY OF OPERATION
- 2.1General
- 2.2Power Supply
- 2.3High Speed Serial Interconnect
- 2.4Audio Circuits
- 2.5PTT Circuitry
- 2.6Microprocessor Board
- 2.7Channel and Bank Selection
- 2.7.1Channel Select Line Mapping
- 2.8Jumper Functions and standard configuration
- 2.9Hang Timer Selection
- 2.10Kerchunk noise selection
- 2.11Test Points
- 2.12Connector Pinouts
- 2.12.1Connector J9
- 2.12.2Connector P1
- 2.13Transmitter Programming
- 2.13.1Transmitter Wide Options
- 2.13.1.1Frequency Band
- 2.13.1.2Source ID
- 2.13.1.3Secure Hardware Equipped
- 2.13.1.4Timeout Options
- 2.13.2Channel Wide Settings
- 2.13.2.1Channel Name
- 2.13.2.2Frequency
- 2.13.2.3Analog Bandwidth
- 2.13.2.4Deviation
- 2.13.2.5Channel Type
- 2.13.2.6Audio Pre-emphasis
- 2.13.2.7Timeout Value
- 2.13.2.8Project 25 Squelch Settings: Network Access Code (NAC)
- 2.13.2.9Project 25 Squelch Settings: Talk Group ID (TGID)
- 2.13.2.10Analog Signaling Settings: Signaling
- 2.13.2.11Analog Signaling Settings: CTCSS Tone
- 2.13.2.12Analog Signaling Settings: Reverse Burst
- 2.13.2.13Analog Signaling Settings: DCS Code
- 2.13.2.14Analog Signaling Settings: Turnoff Code
- 2.13.2.15Analog Squelch Settings: Invert DCS
- 3Transmitter Assembly and Adjustment
- 3.1Frequency Change
- 3.2Minor Frequency Change
- 3.3Major Frequency Change
- 3.4Digital Signal Processor Board Alignment
- 3.4.1Radio Service Software
- 3.4.2Radio Programming Interface Module Interconnection
- 3.4.3Reference Oscillator Adjustment
- 3.4.4Transmitter Deviation Balance Adjustment
- 3.4.5Transmitter Deviation Limit Adjustment
- 3.4.6Audio Level Alignment
- 3.4.7Amplifier Alignment
- 3.5Recommended Test Equipment List
- 3.6Repair Note
- 3.7Printed Circuit board Numbering Convention
- 4Repeater System Configuration
- 4.1Interim Repeater
- 4.1.1Repeater Interconnect Cable Pinout
- 4.2Project 25 Compliant Repeater
- 4.3Repeater System Troubleshooting
- 5ILLUSTRATIONS
- 5.1Digital Repeater Transmitter Front Panel
- 5.2Digital Repeater Transmitter Exploded View
- 5.3Digital Repeater Transmitter Block Diagram (Interim Mode)
- 5.4Digital Repeater Transmitter Schematic Diagram
- 5.5Digital Repeater Transmitter Main Board Component Layout (Bottom)
- 5.6Digital Repeater Transmitter Main Board Component Layout (Top)
- 5.7Digital Repeater Microprocessor Board Component Layout (Bottom)
- 5.8Digital Repeater Microprocessor Board Component Layout (Top)
- 6PARTS LIST
- 6.1Digital Repeater Transmitter Main Board Parts List
- 6.1.1Digital Repeater Transmitter Main Board Electrical Parts List
- 6.1.2Digital Repeater Transmitter Main Board Mechanical Parts List
- 6.2Digital Repeater Microprocessor Board Parts List
- 6.2.1Digital Repeater Microprocessor Board Electrical Parts List
- 6.2.2Digital Transmitter Additional PCBs
- 7REVISION HISTORY
DE
DANIELS
ELECTRONICS
3-2 UT-4R400 UHF Project 25
Digital
Transmitter
Instruction
Manual
3.3 Major Frequency
Change
Changes
greater
than ± 1 MHz from a previously tuned
transmit
frequency will require RF
Amplifier
al
ignment
as per the UHF
Amplifier
Instruction Manual. The
Digital
Transmitter
Signal
Processor Board, once
programmed
for the new frequency, should not require any alignment, as it
is
capable
of
operation
over the
entire
band from 406-470 MHz.
3.4
Digital
Si
gnal Processor
Board
Alignment
If the
Digital
Signal Processor or
Transceiver
RF Boards have been replaced, it is necessary to
align the
Digital
Signal Processor Board. This consists of
adjusting
the
reference
oscillator
frequency,
aligning
the
deviation
balance
at high and low
modulation
frequencies, and
adjusting
the
deviation
limiting
at a number of
frequencies
over the
operational
band of the Receiver.
3.4.1 Radio
Service
Software
The Radio Service Software is an
application
that runs under
Microsoft
Windows
3.1,
95, or 98,
and is used to program the radio’s
channel
frequencies
and other
operational
characteristics.
It is
used in
conjunction
with the Radio Programming
Interface
Module
to read and write
information
to
the
internal
memory of the radio. For
information
about
installing
and using the Radio Service
Software, see the Radio Service Software Manual, which is
available
as an Adobe
Acrobat
file
(.PDF) on the CD-ROM, which contains the Radio Service Software.
3.4.2 Radio Programming Interface Module
Interconnection
The Radio Programming
Interface
Module
is used to make a
connection
between the
computer
running the Radio Service Software and the radio module. On the
computer
side, it connects to an
RS-232 serial port via a standard nine pin serial cable.
Another
cable
connects the Radio
Programming
Interface
Module
to the radio to be programmed.
Once
the
connections
are made,
the Radio Service Software may be run on the
computer
and the radio switched on. The Radio
Service Software must be configured to use the
correct
serial port on the computer. This is done in
the Preferences menu of the
Main
screen. When the radio is switched on, the Power
LED
on the
Radio Programming
Interface
Module
should light. To test the serial connection, open the
Receiver
Configuration
screen by
clicking
on the
Transmitter
button in the
Main
screen.
Click
on
the
Receiver
menu, then on the ID… menu item.
Click
on the Read ID button. The
Data
LED
on
the Radio Programming
Interface
Module
should
light
briefly and the serial number,
model
number, and last
programmed
date should appear in the
appropriate
fields.
3.4.3
Reference
Oscillator
Adjustment
The
reference
oscillator
provides an
accurate
frequency standard to which the transmitter's
carrier
signal is phase locked. To adjust the
reference
oscillator
frequency,
disconnect
the
Transceiver
RF
Board from the
amplifier
module by
separating
the SMB connectors. For this test, the
Transceiver
RF board will
generate
a 0 dBm RF signal from its RF output. Connect the RF output
cable
of the
Transceiver
RF board to a frequency counter or
communications
test set. Connect the
transmitter
to an IBM
compatible
computer
using the Programming Cable. Apply power to the
transmitter
and
run the Radio Programming Software.
Navigate
to the
TRANSMITTER
\
SERVICE
\
REFERENCE
OSCILLATOR
menu, where you will see a test frequency displayed and a slider to
adjust the frequency.
Click
on the
"ENABLE
TX" button and move the slider
until
the frequency