HYT TR-800 User manual

Contents
Revision History...................................................................................................................1
General ................................................................................................................................1
Repeater Overview ..............................................................................................................3
Software Specification..........................................................................................................5
Circuit Description..............................................................................................................10
MPU Pins...........................................................................................................................16
Programming Guide...........................................................................................................18
Part List 1(Logic Board Unit)..............................................................................................32
Parts List 1 (Power Management Board Unit)....................................................................39
Adjustment Description......................................................................................................42
Duplexer Instructions .........................................................................................................49
Battery Revert....................................................................................................................52
Troubleshooting Flow Chart...............................................................................................56
Disassembly and Installation .............................................................................................59
Exploded View ...................................................................................................................64
Parts List 2.........................................................................................................................65
Wiring Diagram ..................................................................................................................67
Packing ..............................................................................................................................68
Logic Board Top View ........................................................................... 错误！未定义书签。
Logic Board Bottom View...................................................................................................70
Power Management Board Top View.................................................................................71
Power Management Board Bottom View ...........................................................................72
Logic Board Schematic ......................................................................................................73
Power Management Board Schematic ..............................................................................74
Specifications.....................................................................................................................75

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Revision History
P/N Release Date Revision
8130080000000 2007-2-3 Initial Release
General
Manual Scope
This manual is intended for use by experienced technicians familiar with similar types of
communication equipment. It contains all service information required for the equipment and is
current as of the publication date.
Safety and General Information
The following general safety precautions as would normally apply, should be observed during all
phases of operation, service and repair of this equipment.
5This equipment should be serviced by qualified technicians only.
5Do not modify the repeater for any reason.
5To avoid electromagnetic interference and/or compatibility conflicts, do not operate your
repeater when you are near 380V AC mains or above.
5For vehicles with an air bag, do not place a repeater in the area over an air bag or in the air bag
deployment area. Air bags inflate with great force. If a repeater is placed in the air bag
deployment area and the air bag inflates, the repeater may be propelled with great force and
cause serious injury to occupants of the vehicle.
5Turn off your repeater prior to entering any area with a potentially explosive atmosphere.
5To avoid possible interference with blasting operations, turn off your repeater when you are
near electrical blasting caps, in a blasting area, or in areas posted: “Turn off two-way radio.”
Obey all signs and instructions.
5Do not charge your back-up battery in a potentially explosive atmosphere
5Do not expose the repeater to direct sunlight over a long time, nor place it close to heating
source.
5Do not place the repeater in excessively dusty, humid areas, nor on unstable surfaces
5Connect to the lightning arrester prior to the antenna which is installed outdoors, and the
chassis or equipment housing must be connected to an absolute earth ground, to minimize any
possible shock hazard from lightning strike.
5Please make sure no stress on the antenna joint during transportation or installation.

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Caution:
This equipment generates, uses, and can radiate radio frequency energy and, if not installed or
used in accordance with the owner’s manuals, can cause interference to radio communications.
HYT endeavors to achieve the accuracy and completeness of this manual, but no warranty of
accuracy or reliability is given. All the above specifications and design are subject to change without
notice due to continuous development.
No part of this manual may be copied, reproduced, translated, stored in a retrieval system,
distributed, or transmitted in any form or by any means, electronic or mechanical, for any purpose
without the express written permission of HYT.

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Repeater Overview
1. Speaker ①
2. LED Indicators
Red LED ② lights while the main radio is transmitting, and flashes while receiving.
Green LED ③lights while the slave radio is transmitting, and flashes while receiving.
Dark red LED ④lights while DC power supplies and the AC power fails.
Orange LED ⑤lights while the repeater in setup state and goes out while in knockdown state.
Blue LED ⑧lights while the RPT/OPT is active, and goes out while inactive.
3. Repeater Setup/Knockdown ⑥
The Setup button is a momentary contact switch that enables or disables the main radio of TR-800.
4. LCD Display ⑦
Display current channel number, frequency, power level, receive status, etc.
5. Power Switch/Volume Control Knob ⑨
The Power Switch is located in the center of the knob, short press of which turns repeater on,
and long press for 1 second turns repeater off. Rotate the Volume Control knob clockwise or
counter-clockwise to adjust the volume for a desired level.
6. Microphone Hook ⑩
7. RPT Button, OPT Button
Press the RPT button to enable uni-directional repeater, and press the OPT button to
enable bi-directional repeater.
8. Scan Button, Monitor Button
Press the Scan button to initiate repeater scan, which can be activated only when in

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uni-directional mode (forward directional, i.e., RPT is active while OPT is inactive).
Short press the Monitor button to display channel frequency by turns of slave radio Rx
frequency, slave radio Tx frequency, main radio Rx frequency, main radio Tx frequency; long press it
to monitor the activities on the current channel. The main radio processes monitoring while OPT is
active, the slave radio processes monitoring while OPT is inactive.
9. “Up” Button and “Down” Button
Press the “Up” or “Down” button to select a desired channel.
10. RJ45 Connector
Plug the desktop microphone or palm microphone into this port to input audio, or plug the
programming cable into this port to program both radios.
11. Antenna Connector
The N connector is for connecting with the main radio’s antenna, while the BNC connector
is for the slave radio’s antenna.
When using duplexer, choose the correct adaptor on the back of TR-800 according to your
antenna connector type.
12. Fan
The fan is temperature-controlled with continuously variable speed as temperature changes.
13. AC Power Inlet (with Switch )
14. Accessory Connector (DB15/F)
Used for external control equipment or link equipment.
15. Grounding Lug
For lightning protection, this terminal must be connected to an absolute earth ground via a thick
copper wire, or use lightning arrester if necessary.
16. DC Power Inlet
The power supply would auto-revert to backup battery once the AC mains fails. This DC port also
provides floating charge function with approximate 400mA current.
17. DC Fuse
The 15A/32Vdc fuse protects against battery polarity reversal.

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Software Specification
Basic Operation
Short press the Power Switch to turn on the repeater; rotate the Volume Control knob clockwise to
adjust the volume for a comfortable listening level. Press the “Up” or “Down” button to select a desired
channel, then the repeater operates as you set.
To achieve the basic repeater functions, the radio must be in the repeater setup, and operates in the
uni-directional or bi-directional repeater mode.
Repeater Hang Time
When the repeater stops receiving upon signal off, the transmitter remains transmitting for a
programmed time period, which reduces delay on conversation due to the setup of repeater link. The
Repeater Hang Time can be activated when in forward directional repeater only.
Frequency Display
Short press the Monitor button displays the frequency in the turn of: slave radio Rx frequency, slave
radio Tx frequency, main radio Rx frequency, main radio Tx frequency.
Monitor
If the monitor function is set by your dealer, long press the programmed Monitor key while in receive
mode, to hear activities on current channel. The monitor function is disabled while in the bi-directional
repeater mode. Two operation modes listed below are provided for you to choose via the programming
software.
A. Carrier Squelch-Momentary
Hold down the Monitor key to open CTCSS/CDCSS signalling squelch. Release it to close the
signalling squelch.
B. Squelch Off-Momentary
Hold down the Monitor key to open carrier squelch; release it to close the carrier squelch.
Scan
The scan function can be activated while in the forward directional repeater mode only. Press the Scan
button to initiate repeater scan (if scan parameter is applicable). The Scan Interval Time and Dropout
Delay Time are configurable via the programming software.
CTCSS/CDCSS
Set up talkgroups/users with unique CTCSS/CDCSS to prevent unwanted conversations on the same
frequency. If CTCSS/CDCSS is set on current channel, a CTCSS/CDCSS match will be required on an
incoming call. If not set, the radio unmutes to all calls within the communication range on current channel.
Your dealer may preset CTCSS/CDCSS on certain channels.
Note: This feature does not mean that your conversation will not be heard by others.

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Time-out Timer (TOT)
The feature allows for efficient use of channels by limiting the maximum time of each transmission. It
protects the radio from damage caused by long time transmission. Once a continuous transmission
exceeds the preset time (15～1200s programmable), the transmission will be automatically terminated
and alert tone will be heard. The alert tone ceases upon the release of the PTT.
Selectable Squelch Level (SQL)
Squelch levels from 0 to 9 are selectable via the programming software.
Voice Compander/Scrambler
The voice compander/scrambler feature may be enabled/disabled via the programming software. The
emphasis/de-emphasis function needs to be disabled while the scrambler feature is enabled, and
enabled while the scrambler feature is disabled.
High/Medium/Low Power Programmable
High/Medium/Low power is selectable via the programming software.
Programmable Channel Spacing
A wide/narrow channel spacing is selectable via the programming software.
Repeater Modes
Knockdown Mode
Setup Mode
Base Station
Forward Directional
Repeater
Reverse Directional
Repeater
Bi-directional Repeater
PC Programming Mode

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Modes Description
Mode Description
Knockdown Press the SETUP button while the repeater is power on. The repeater
enters knockdown mode once the orange LED goes out.
Setup
Base Station
Press RPT and OPT buttons when the SETUP orange LED is on. The
radio enters base station mode once both the RPT and OPT blue
LEDs go out.
Forward
Directional
Repeater
Press RPT and OPT buttons when SETUP orange LED is on. The
repeater enters forward directional mode once the RPT blue LED is
on while the OPT blue LED goes out.
Reverse
Directional
Repeater
Press RPT and OPT buttons when the SETUP orange LED is on. The
repeater enters reverse directional mode once the RPT blue LED
goes out while the OPT blue LED is on.
Bi-directional
Repeater
Press RPT and OPT buttons when the SETUP orange LED is on. The
repeater enters bi-directional repeater mode once both the RPT and
OPT blue LEDs are on.
PC Programming The repeater enters PC programming mode once command is
received from PC, while the SETUP orange LED is on.
Repeater Setup/Knockdown
Press the Setup button located on the front panel to toggle between repeater setup and knockdown,
with LED indications. While in setup state, both radios turn on at power up; in knockdown state, only
receive radio turns on at power up. There are three repeater types: base station, uni-directional and
bi-directional in the repeater setup state. The repeater is initialized to base station mode when it toggles
from knockdown to setup state. But in the knockdown state, the repeater works only as a receiver.
In base station mode, the repeater function is disabled, with the slave radio as a receiver and the main
radio as a transmitter. In bi-directional repeater mode, the front panel PTT is disabled.
The repeater setup/knockdown status will be recorded after the repeater power failure. (E.g. If the
repeater operates in forward directional mode, it will still work in such mode after the power recovers)
PC Programming Mode
Connect the PC with the repeater via programming cable. Data can be transmitted from PC to the
repeater. Repeater LCD displays “PROGRAMMING” while reading/writing data from/into the radio, with
red LED flashes indicating programming the main radio, and then green LED flashes indicating
programming the slave radio. The repeater needs to reset for proper operation after programming
is finished.

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LCD Display
LCD Icon Description
Indicator Description
1. Displays zone/channel number
2. Displays zone/channel name up to 12 alphanumeric characters
(preprogrammed by your dealer)
3. Displays channel frequency
4. Displays preprogrammed function
1. Displays zone/channel number
2. Displays transmit power level (the 4th digit: H, M, L)
3. Displays preprogrammed function
Appears when the current channel is already in use
Appears when the Monitor key is pressed to disable CTCSS/CDCSS, DTMF,
2-Tone/5-Tone decoding.
Appears when the repeater is unmuted upon the Monitor key is pressed.
A Indicates the future development feature.
SCAN Appears while repeater scanning.
CALL Appears when transmitting a selective call.
Appears when a message is received.
Reserved
Reserved