HYT TM-800U User manual

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THANK YOU!
Thank you for your purchase of HYT mobile radio TM-800. We believe this
easy-to-use radio will provide you with dependable and reliable
communications at peak efficiency. Please read this manual carefully before
use. The information presented herein will help you to derive maximum
performance from your radio.
MODELS COVERED IN THIS MANUAL
TM-800 VHF Mobile Radio
TM-800 UHF Mobile Radio

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HOT SURFACE
Avoid contact durin g prolonged use
Do not touch the metal surface of the radio while it is in use.
Do not mount the radio such that the chassis can come in contact with skin.
High temperatures may burn you skin.
MANDATORY SAFETY INSTRUCTIONS TO INSTALLERS AND USERS
════════════════════════════════════════════════════════════════
●Use Only manufacturer or dealer supplied antennas.
●Antenna minimum safe distance: 82cm (32 inches).
●Antenna used for this transmitter must not exceed an antenna gain of 3dBi.
The FCC (Federal Communications Commission) has adopted a safety standard for
human exposure to RF energy which is below the OSHA (Occupational Safety and Health
Act) limits.
●Antenna mounting: The antenna supplied by the manufacturer or radio dealer must not
be mounted at a location such that during radio transmission, any person can come
closer than the above indicated minimum safe distance to the antenna (i.e.
82cm/32inches).
●To comply with current FCC RF Exposure limitations, the antenna must be installed at
or exceeding the minimum safe distance indicated above, and in accordance with the
requirements of the antenna manufacturer or supplier.
●Vehicle installation: The antenna can be mounted at the center of a vehicle metal roof or
trunk lid if the minimum safe distance is observed.
Antenna substitution: Don’t substitute any antenna for the one supplied or recommended
by the manufacturer or radio dealer. You may be exposing person(s) to excessive radio

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frequency radiation. You may contact your radio dealer or the manufacturer for further
instructions.
Warning
Maintain a separation distance from the antenna to person(s) at least 82cm (32inches).
“This transmitter is authorized to operate with a maximum duty factor of 50%, in a typical
push-to-talk mode, for satisfying FCC RF exposure compliance requirements.”

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Contents
Caution
MANDATORY SAFETY INSTRUCTIONS
User Safety, Training, and General Information
Compliance with RF Energy Exposure Standards
FCC Compliance
Precautions
Product Inspection
Radio Installation and Warnings
Radio Overview
Basic Operations
Turn the Radio On/Off
AdjusttheVolume
Monitor
Select a Channel
Select a Zone
Receive
Transmit
Selectable Power Level
Beginning / End of Transmission ID
Channel Scan
Busy Channel Lockout (BCL)
BCL Override
DTMF Call
Code Squelch
Time-Out-Timer (TOT)
Emergency Call
Stun
Programmable Auxiliary Functions
Reverse Frequency
Talkaround
Selectable Squelch Level
User Selectable Tone (UST)
Public Address
Dual Home Channels
HornAlert
Selectable 2-Tone Encode
Selectable 5-Tone Encode

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Display Frequency
Display Label
Display Mode
LCD Backlight
Compander
Scrambler
Short Message
GPS Report
Optional Signalling
User Set Mode
Appendix 1 Entering Characters
Optional Accessories

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User Safety, Training, and General Information
READ THIS IMPORTANT INFORMATION ON SAFE AND EFFICIENT OPERATION
BEFORE USING YOUR HYT MOBILE RADIO.
 Compliance with RF Energy Exposure Standards
Your HYT mobile radio is designed and tested to comply with a number of national and
international standards and guidelines (listed below) regarding human exposure to radio
frequency electromagnetic energy. This radio complies with the IEEE and ICNIRP
exposure limits for occupational/controlled RF exposure environment at operating duty
factors of up to 50% transmitting and is authorized by the FCC for occupational use only.
In terms of measuring RF energy for compliance with the FCC exposure guidelines, your
radio radiates measurable RF energy only while it is transmitting (during talking), not
when it is receiving (listening) or in standby mode.
Your HYT mobile radio complies with the following of RF energ y exposure
standards and guidelines:
 United States Federal Communications Commission, Code of Federal
Regulations; 47CFR part 2 sub-part J
 American National Standards Institute (ANSI)/Institute of Electrical and
Electronic Engineers (IEEE) C95. 1-1992
 Institute of Electrical and Electronic Engineers (IEEE) C95. 1-1999 Edition
 International Commission on Non-Ionizing Radiation Protection (ICNIRP) 1998
Operational Instructions and Training Guidelines
To ensure optimal performance and compliance with the occupational/controlled
environment RF energy exposure limits in the above standards and guidelines, users
should transmit no more than 50% of the time and always adhere to the following
procedures:
Transmit and Receive
To transmit (talk), push the Push-To-Talk (PTT) button; to receive, release the PTT button.

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Approved Accessories
For a list of HYT approved accessories, see the accessories page of this user manual or
visit the following website which lists approved accessories: http://www.hyt.com.cn.
 FCC Compliance
Part 15 Compliance
This equipment has been tested and found to comply with the limits for a Class B digital
device, pursuant to part 15 of the FCC Rules. These limits are designed to provide
reasonable protection against harmful interference in a residential installation. This
equipment generates, uses and can radiate radio frequency energy and, if not installed
and used in accordance with the instructions, may cause harmful interference to radio
communications. However, there is no guarantee that interference will not occur in a
particular installation. If this equipment does cause harmful interference to radio or
television reception, which can be determined by turning the equipment off and on, the
user is encouraged to try to correct the interference by one or more of the following
measures:
Reorient or relocate the receiving antenna.
Increase the separation between the equipment and receiver.
Connect the equipment into an outlet on a circuit different from that to which the
receiver is connected.
Consult the dealer or an experienced radio/TV technician for help.
FCC Licensing Requirements
Your radio must be properly licensed Federal Communications Commission prior to use.
Your HYT Wireless dealer can assist you in meeting these requirements. Your dealer will
program each radio with your authorized frequencies, signalling codes, etc., and will be
there to meet your communications needs as your system expands.
Precautions
General Safety Standards
* Use HYT power cable only or other power cable with fuse (32V/16A).
* Do not attempt to configure the radio while driving; it is too dangerous.
* Do not operate your radio when someone is either touching the antenna or standing
within 2 or 3 feet of it, to avoid the possibility of radio frequency burns or related
physical injury.

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* Do not operate the radio near dynamite blasting caps or in an explosive atmosphere.
* Switch OFF the radio while refueling or parking at gas station.
* Turn off your radio in any place where posted notices instruct you to do so.
* Do not modify the radio for any reason.
* Do not expose the radio to direct sunlight over a long time, nor place it close to heating
source.
* Do not place the radio in excessively dusty, humid areas, nor on unstable surfaces.
* Refer service to qualified technicians only.
Operation Safety Guidelines
* For vehicles equipped with electronic anti-skid braking systems, electronic ignition
systems or electronic fuel injection systems, interferences may occur during the radio
transmission. If the foregoing electronic equipments are installed on your vehicle,
please contact your dealer for further assistance to make sure that the radio
transmission will not interfere with these equipments.
* For radio installation in vehicles fueled by LP gas with LP gas container within interior of
the vehicles, the following precautions are recommended for personal safety.
(1) Any space containing radio equipment shall be isolated by a seal from the space in
which the LP gas container and its fittings are located.
(2) Remote (outside) fitting connections shall be used.
(3) Good ventilation is required for the container space.
Safety: It is important that the operator is aware of, and understands, hazards common
to the operation of any radio.
Installation Safety Guidelines
* Do not mount the mobile radio overhead or on a sidewall unless you take special
precautions.
* If someone were to remove the radio and fail to replace it properly, road shock could bump
the radio loose, and the falling radio could, in some circumstances, cause serious injury
to the driver or a passenger. In a crash, even when properly installed, the radio could
break loose and become a dangerous projectile.

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Product Inspection
Please carefully unpack the radio. Before use, it is recommended that you inspect the
product as follows.
First check the shipping carton for any signs of damage. Confirm the supplied product
against the packing slip to assure accuracy. If any items are missing or have been
damaged during shipment, please file a claim to the carrier immediately.
Supplied Accessories
Item Quantity (pcs)
DC Power Cable 1
Mounting Bracket 1
Microphone 1
Microphone Hanger 1
Screw Set 6
Fuse 2
Owner’s Manual 1
Microphone SM07R2 & Microphone Cable Microphone Hanger
Mounting Bracket Adjustment Screw Screw Set
PowerCable Fuse

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Radio Installation
■Installing the Radio
1. Attach the mounting bracket, using the 4.8 x 20mm self-tapping screws, in a location
where convenient operation is accessible.
2. Connect the antenna and the supplied power cable to the radio.
3. Slide the radio into the mounting bracket and secure it using the Adjustment screws.
4. Mount the microphone hanger, using the 4 x 16mm self-tapping screws, in a location
where it will be within easy reach of the user.
5. Connect the microphone plug to the microphone jack on the front panel of the radio,
then place the microphone on the hanger.
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3
2
4
5
6
7
8
9
12
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Fig. 1 Radio Set Connection Detail
1. Microphone
2. Mounting bracket
3. 4.8 × 20 mm Self-tapping screw
4. Microphone hanger
5. 4 × 16 mm Self-tapping screw
6. Power input connector
7. Red lead
8. Black lead
9. Fuse
10. Antenna connector
11. Main unit
12. Adjustment screw

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■Installation Tools
The following tools are required for proper installation of your radio:
 Electric drill: ¢6mm or above
 Cross head Screwdriver
■Warnings:
1. The radio operates in 13.6 ± 5％Vnegative ground systems only. Check the voltage
and polarity of the power supply on the vehicle before installation.
2. Be sure to check how far the screw will extend below the radio surface to avoid
damage to the auto wiring or auto parts when drilling mounting holes.
3. Connect the radio with the supplied antenna and power cable before installing the
radio by the mounting bracket.
4. Install the radio securely using the supplied mounting bracket to make sure that the
radio will not loosen in the event of accidents. The loose radio may cause injury to the
passenger.
5. Arrange the installation location of the radio to make sure that the control unit in the
front panel is convenient for operation.
6. Be sure to determine the location of the installing holes before installation and drilling.
7. Be sure to make room at the rear of the radio for power cable connection.
8. When replacing the fuse in the DC power cable, be sure to replace it with a fuse of
the same value. Never replace a fuse with one that has a higher value.

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Radio Overview
■Front Panel View
①Power Switch
Press to switch the radio on/off.
②Selector Knob
Volume Up/Down, Channel Up/Down, Zone Up/Down features can be programmed to
this knob (set by your dealer).
Turn the knob clockwise to adjust upwards and counterclockwise to adjust downwards.
③LCD Display
Please refer to “LCD Display” section.
④Up/Down Key
Volume Up/Down, Channel Up/Down, Zone Up/Down features can be programmed to the
keys (set by your dealer).
⑤LED Indicator
⑥Speaker
⑦Programmable Function Key (PF1-PF6)
Your dealer can program these keys as shortcuts to various radio features.
Please refer to “Programmable Function Key” section.
⑧Microphone Jack
Insert the microphone plug into this jack.
■LED Indicator
The LED indicator
 glow red while transmitting
 glow green while receiving
 flash orange when receiving code squelch, selective call, the matching
2-Tone/5-Tone or DTMF signaling

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■LCD Display
Indicator Description
1. Display zone / channel number.
2. Display zone / channel label (set by your dealer, up to 12
alphanumeric characters).
3. Display channel Frequency
4. Display the preprogrammed functions
1. Display zone / channel number.
2. Display transmit power level (H, M or L).
3. Display the preprogrammed functions
Appears when the selected channel is busy.
Appears when [MONI] key is pressed to disable CTCSS,
CDCSS, DTMF or 2-Tone/5-Tone.
Appears when [MONI] key is pressed to switch the speaker on.
A1. Indicate second development feature.
2. Appears when the auxiliary function is activated.
SCAN Appears while scanning.
CALL Appears when transmitting a selective call.
Appears when a new message is received.
Appears when the selected zone is in the scan list.
Appears when the selected channel is in the scan list.

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Programmable Function Key
PF1-PF6 key can be programmed with the following auxiliary functions:
1. Off
2. VOL UP
3. VOL Down
4. CH Up
5. CH Down
6. Zone Up
7. Zone Down
8. MoniA
9. MoniB
10. MoniC
11. MoniD
12. DLabel
13. Dfreq
14. Dmode
15. UserTone
16. Sel2Tone
17. Sel5Tone
18. TXPower
19. Scan Add/Del
20. Reverse
21. TA
22. SELSQL
23. HomeCH
24. PA
25. HornAlert
26. LCDBL
27. Scramble
28. Compand
29. AUX A
30. AUX B
31. Send GPS
32. Emergency
33. Message

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■ Rear Panel View
①Antenna Connector
Used to connect external antenna.
②Power input Connector
Adopt HYT-authorized DC power cable and 13.6 V input AC power.
③Speaker Jack
Used to connect external speaker and only available for the plug of 3.5 mm.
④GPS Antenna Jack
⑤15 Pin Connector (for accessories)

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Basic Operations
Turn the Radio On/Off
Press the Power switch to switch the radio on.
Press and hold the Power switch for approximately 1 second to switch the radio off.
If Power on Password is set to protect your radio, “Chk P” and the cursor will appear on
the display when power is turned on. You can unlock the radio by entering the correct
password (8 digits maximum):
1. Select a digit (0-9) by rotating the selector knob.
If you are using an optional microphone with a keypad, you can also enter the
password by pressing the appropriate keypad keys.
2. Press the [PF3] / [PF4] key to move cursor forward and backward.
This step can be skipped when using the keypad.
3. Repeat steps 1 and 2 to enter the entire password.
4. Press the [PF6] key or the [PTT] key to complete the entry.
Adjust the Volume
Selector Knob, [▲] / [▼] or the function keys PF1-PF6 can be programmed with VOL Up /
VOL Down features to adjust volume level.
Rotate the Selector Knob clockwise or press the key which be programmed as [VOL Up]
key to increase the volume; rotate the knob counter-clockwise or press the key which be
programmed as [VOL Down] key to decrease the volume. The current volume level is
displayed on the LCD. The LCD returns to original display mode in 5 seconds. Press any
key to exit from the volume level display mode.
Monitor
If monitor feature is set by your dealer, press the key programmed as [MONI] in receive
mode to monitor activity on your selected channel.
Your dealer can select one of the following four modes for monitor feature:
 Monitor Unmute-Momentary
Hold down the [MONI] key to open CTCSS/CDCSS/DTMF/2-Tone/5-Tone signalling
squelch. Release to close the signalling squelch.
 Monitor Unmute-Toggle
Press the [MONI] key to open CTCSS/CDCSS/DTMF/2-Tone/5-Tone signalling
squelch. Press again to close the signalling squelch.
 Carrier Squelch-Momentary
Hold down the [MONI] key to open carrier squelch; Release to close the carrier
squelch.
 Carrier Squelch-Toggle
Press the [MONI] key to open carrier squelch. Press again to close the carrier
squelch.
Select a Channel
Selector Knob, [▲] / [▼] or the function keys PF1-PF6 can be programmed with CH Up/

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CH Down features to select a channel. Transmit/Receive frequencies of the channel are
set by your dealer.
Rotate the Selector Knob clockwise or press the key which be programmed as [CH Up]
key to select a channel upwards; Turn the knob counterclockwise or press the key which
be programmed as [CH Down] key to select downwards.
Select a Zone
Selector Knob, [▲] / [▼] or the function keys PF1-PF6 can be programmed with Zone Up/
Zone Down features to select a zone. Transmit/Receive frequencies of the channel are
set by your dealer.
Rotate the Selector Knob clockwise or press the key which be programmed as [Zone Up]
key to select a zone upwards; Turn the knob counterclockwise or press the key which be
programmed as [Zone Down] key to select downwards.
Receive
If your dealer has programmed CTCSS/CDCSS/DTMF/2-Tone/5-Tone signalling on the
selected channel, you will hear calls only when the matching code or tone is received;
otherwise, all calls on the same channel can be heard.
Transmit
1. Press the key programmed as [MONI] to make sure that the selected channel is not in
use.
2. Hold down the [PTT] key.
3. Dial a DTMF number using the microphone keypad.
Step 3 is not necessary all the time.
4. Speak into the microphone with normal voice. The LED glows red during
transmission.
5. Release the [PTT] key to receive.
6. When your conversation is finished, return the microphone to its hanger.
Selectable Power Level
If transmit power (programmed by your dealer) is set to “high” (or "middle”) on any given
channel, press the key programmed as [TX Power] to toggle the TX power among high,
middle and low. The current power level is indicated by “H” /“M” / “L” icon on the LCD.
Since low power helps to conserve battery power and reduce the risk of interfering with
others, you are recommended to select low power when communication quality is
guaranteed.
Notes:
●Press the [TX Power] key while using a channel programmed with low power, an error
tone will sound and the transmit power will not change.
●When changing a channel from high/middle power to low power, all other channels
programmed with high/middle power will change to low power accordingly.

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Beginning/End of Transmission ID Signal
The radio can be programmed to send Beginning/End of Transmission ID when
accessing / releasing repeaters or telephone systems. The ID signal includes DTMF and
5-Tone types. Two modes can be configured:
●Press the [PTT] key to send a Beginning of Transmission ID Signal; Release the [PTT]
key to send an End of Transmission ID Signal.
●Press [*] while holding down the [PTT] key to send a Beginning of Transmission ID
Signal; press [#] while holding down the [PTT] key to send an End of Transmission ID
Signal (for DTMF type only).
Channel Scan
▇Scan Types
●Single Zone Scan
All channels in the current zone that have been added to the scan list can be scanned.
●Multi Zone Scan
All channels within all the zones that have been added to the scan list can be scanned.
●List Zone Scan
The radio only scans the channels within the specified range of zones that have been
added to the scan list. Individually each zone is assigned with a scan list, which provides
quick recognition of the zones to be locked out of scan list.
Note: Scan list for each zone can be added/ deleted.
▇Scan Start
Press the key programmed as [SCN], scan starts from the current channel and ascends
through the channel numbers in scan list. “SCAN” appears on the LCD (“-SCAN X -”in
List Zone Scan mode, “X” is the current list number).
Note: Scan function can be used only when two or more channels are in the scan list.
▇Scan Stop
1. Press the [SCN] key again to stop scanning. “SCAN” disappears on the LCD.
2. Activate the Monitor function.
3. Carrier is detected on channels where no signalling is set.
4. Carrier is detected on channels where signalling is set, and the matching signalling is
received.
▇Scan Restart
When the radio stops on a busy channel, scanning can be restarted according to the
restart mode, which can be programmed by the dealer as carrier-operated scan or
time-operated scan.
●Carrier Operated Scan
Scanning remains on an active channel until there are no activities; while the channel is
free, the radio remains on the channel for the programmed Dropout Delay Time
(programmed by your dealer) before it resumes scanning.

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●Time Operated Scan
Scanning remains on the active channel for only the programmed Dropout Delay Time
(programmed by your dealer) before it resumes scanning. After the expiration of
Dropout Delay Time, the radio will begin scanning other channels even if the channel
is still busy.
▇Dual Priority Scan
If your dealer has programmed dual priority channels, the radio will periodically detect the
activity on priority channels while stopping on non-priority channels. When any activity is
detected on the priority channels, the radio will switch to the priority channels for
communications.
“P1” appears on the LCD when the channel is set as Priority 1, “P2” appears when set as
Priority2, and “PP” when set as both Priority 1 and Priority 2.
▇Operator Selectable Priority Channel
If priority channel is programmed by your dealer as “Operator Selectable”, you can set the
current channel as priority or non-priority channel:
Press the key programmed as [MONI] twice while holding down the key programmed as
[SCN], the current channel is changed to "Priority 2".
Press the [MONI] key three times while holding down the [SCN] key, the current channel
is changed to "Priority 1".
Press the [MONI] key four times while holding down the [SCN] key, the current channel
restores to original setting.
▇Scan Add/Delete
This feature allows you to add/delete a channel to/from the scan list in the non-scan
mode.
2. Select the channels to be added/ deleted by using the channel selector knob.
3. Press the key programmed as [Add/Del] to toggle between ADD and DELETE.
“”appears on the LCD when a channel is added.
Note: The radio only scans the channels that have been added to the scan list.
▇Look Back Temporary Disable
When scanning looks back and stops on a priority channel, press the key programmed as
[Add/Del] to deactivate the Look Back function.
▇Nuisance Channel Temporary Delete
This feature allows you to temporarily add/delete a channel to/from the scan list during
scanning.
When scanning stops on an undesired channel (e.g. nuisance channel), press the key
programmed as [Add/Del], the channel is temporarily removed from the scan list and
scanning resumes.
Note: The addition/ deletion of channels are not saved when radio exits from the scan
mode.

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▇Revert Channel
Press the [PTT] key during scanning, the radio will stop scanning and switch to the preset
revert channel (programmed by your dealer) for transmission.
▇Off Hook Scan
Normally scanning is not controlled by microphone hook status, it also means that the
radio always scans, and stops by signal presence. But if your dealer has programmed Off
Hook Scan feature, microphone must be on hook for scanning.
Busy Channel Lockout (BCL)
When activated by your dealer, the BCL feature will prevent you from talking on a channel
that is already in use. Press the [PTT] key while the channel is in use, the radio will emit
an alert tone and transmission will be inhibited. Release the [PTT] key to stop the alert
tone. Wait until the channel is not in use before you try to transmit again.
BCL Override
If BCL Override feature is activated, you can override the BCL feature and transmit on a
busy channel. To override the BCL, release the [PTT] key when the alert tone sounds,
then press the [PTT] key again within 0.5 second.
DTMF Call
▇Manual Dial
Hold down the [PTT] key, then enter the DTMF number by pressing the keys ([0] ~ [9], [*],
[#]) on optional microphone keypad. Audible tone sounds when corresponding DTMF
tone is transmitted.
The radio can be programmed by your dealer to remain in transmit mode for 2 seconds
after releasing the [PTT] key. Press any numeric key within 2 seconds to continue
transmission.
▇Keypad Auto PTT
If this feature is programmed by your dealer, you can transmit a DTMF tone by pressing
the keys on optional microphone keypad without holding down the [PTT] key.
▇Store & Send
If this feature is activated, enter a preset DTMF number (16 digits maximum) in receive
mode, then press the [PTT] key to place the call. The DTMF number scrolls across the
LCD display as it is entered, and its corresponding audible tone sounds.
Notes:
●If you enter a wrong digit or decide not to dial the number, press any key other than the
power switch on the front panel to exit.
●The [D] key can be programmed by your dealer as a null tone. This also means that “D”
tone is not transmitted when “D” is entered. Instead, “D” is used for a pause time
(programmable by your dealer).
▇Dial Speed
Your dealer can select dial speed at 6, 8, 10 or 15 digits per second.
This is designed to reduce false decoder operation by providing a fixed time period