Midland MXT275J User manual

MXT275

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Model MXT275
Table of Contents
WELCOME TO THE WORLD OF MIDLAND…………………………………....…….3
FEATURES………………………………………………………………………………………....3
FCC NOTICE……………………..…………….……………………………………………..…..4
Exposure to Radio Frequency Energy………..……………………………………………........4
INSTALLING YOUR RADIO………………………………………………………………….…...5
Preparation for Installation…........…………………………………………....5
Installing the Mounting Bracket…...…………………………………………..6
Installing the Antenna……………….………………………………………….7
Electrical and Rear Panel Connections..……………………………………..8
Connecting the Microphone…………….……………………………………..8
Using an External Speaker……………….…………………………………...9
CONTROLS AND INDICATORS………………………………………………………………....9
Microphone Operating Controls…………..…………………………………..9
Front Panel Connections……………………………………………………..11
Back Panel Connections…………………...………………………………...11
LCD Display…………………………………...……………………….……...12
OPERATING YOUR RADIO…………………………………….……………………….……...13
About Range……………………………………….…………………….…....13
Power On/Off……………………………………..……………………….…..14
Selecting the Active Channel…………………….……………………….....14
Adjusting the Volume………………………………..………………………..14
To Transmit and Receive a Call……………………………………………...15
UTILITY FUNCTIONS………..……………………………………….………………………...15
Locking the Keypad………………………………….………………………..15
Using Monitor Mode………………………………….……………………….16
Scanning for Active Channels………………………...……………………..17
NOAA Weather Radio/Scan……………………………..…………………...17
To Manually Set the Weather Channel………………………………………………………....18
To Enable Weather Alert………………………………………………………………………....18
MENU MODE FUNCTIONS……………………………………………………………………..19
Selecting a Privacy Code………………………………………………....….19
Selecting the Transmit (TX) Power Level………………………………..…21
Adjusting Squelch Sensitivity…………………………………………...…...21
Roger Beep……………………………………………………………….…...22
Call Alert Tone………………………………………………………………...23
Silent Operation………………………………………………………….…....23
Repeater Channels…………………………………………………………...24
Selecting the LCD Display Background Color……………………………..24
CHOOSING YOUR OUTPUT SPEAKER…………………………………………………......25
RESTORING THE DEFAULT SETTINGS……………………………………………………..25
CARE AND MAINTENANCE…………………………………………………………………....26
TROUBLESHOOTING GUIDE…………………………………………….…….…..26
SPECIFICATIONS…………………………………………………………...…........................27
GMRS Frequency Chart……………………………………….....................27
WX Weather Band Chart……………………………………........................27
GMRS Repeater Frequency Chart………………………….......................27
CTCSS Privacy Codes Frequency Chart……………………....................28
DCS Privacy Codes Frequency Chart......................................................28

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Model MXT275
ACCESSORIES…………..……………………………………………………………………..30
LIMITED WARRANTY…………………………………………………………………………..31
WELCOME TO THE WORLD OF MIDLAND RADIO
Congratulations on your purchase of a high quality MIDLAND product.
Your MXT275 two-way radio represents state-of-the-art high tech
engineering. Designed for General Mobile Radio Service (GMRS)
operation, this compact package is big on performance. It is a quality piece
of electronic equipment, skillfully constructed with the nest components.
The circuitry is all solid-state and mounted on a rugged printed circuit
board. Your MXT275 radio is designed for reliable and trouble-free
performance for years to come.
FEATURES
– 15 GMRS Channels
– 10 NOAA Weather Channels
– 8 Repeater Channels
– 142 Privacy Codes (38 CTCSS / 104 DCS)
– Monitor Function
– Keypad Lock
– Power Hi/Lo Settings
– External Speaker Jack
– USB-C Port
IMPORTANT!
Changes or modications to this unit not expressly approved by
MIDLAND RADIO CORPORATION could void your right to operate
this unit. Your radio is set up to transmit a regulated signal on an
assigned frequency. It is against the law to alter or adjust the settings
inside the communicator to exceed those limitations. Any adjustment
to your radio must be made by qualied technicians.

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Model MXT275
FCC NOTICE
The MXT275 operates on GMRS (General Mobile Radio Service) frequencies, which
require a Federal Communications Commission (FCC) license. You must be licensed
prior to operating on channels 1-7, 15-22 and repeater channels 15-22, which comprise
the GMRS channels of the MXT275. Serious penalties may result from unlicensed
use of GMRS channels in violation of FCC rules, as stipulated in the Communications
Act Sections 501 and 502 (amended). You will be issued a call sign by the FCC that
should be used for station identication when operating your radio on GMRS channels.
You should also cooperate by engaging in permissible transmissions only, avoiding
channel interference with other GMRS users, and being prudent with the length of your
transmission time.
To obtain a license or ask questions about the license application, contact the FCC at
1-888-CALL FCC or go to the FCC’s website:
http://www.fcc.gov and request form 605.
This device complies with Part 15 of the FCC rules. Operation is subject to the condition
that this device does not cause harmful interference
Exposure To Radio Frequency Energy
Your Midland radio is designed to comply with the following national and
international standards and guidelines regarding exposure of human
beings to radio frequency electromagnetic energy.
▪United States Federal Communications Commission, Code of Federal
Regulations: 47 CFR part 2 sub-part J
▪American National Standards Institute (ANSI)/Institute of Electrical & Electronics
Engineers (IEEE) C95. 1-1992
▪Institute of Electrical and Electronics Engineers (IEEE) C95. 1-1999 Edition
▪National Council on Radiation Protection and Measurements (NCRP) of the United
States, Report 86, 1986
▪International Commission on Non-lonizing Radiation Protection (ICNIRP) 1998
▪To control your exposure and ensure compliance with the general population or
uncontrolled environment exposure limits, transmit no more than 50% of the time.
The radio generates measurable RF energy exposure only when transmitting.
▪The consumer must maintain a minimum safe separation distance of 33.54 inches
(86 cm) from the antenna when transmitting.

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Model MXT275
INSTALLING YOUR RADIO
Preparation for Installation
This radio may be installed in any 12-volt, negative ground system
vehicle. Most current U.S. and foreign vehicles use a negative ground
system, but some older models and some newer large trucks may have a
positive ground. Check the specications for your vehicle before beginning
installation. Generally, you have a negative-ground system if the negative
(-) battery terminal is connected to the motor block. Contact your dealer if
you are unable to determine your vehicle’s polarity system.
1. Read these instructions completely before beginning installation.
2. Read and follow all safety precautions in your vehicle’s Service Manual.
3. Make sure all necessary tools, materials, and parts are on hand.
4. Disconnect the negative (-) battery cable before installing your radio.
Be sure to reconnect the cable when installation is complete.
5. Determine a mounting location for your radio. The MXT275 is designed
to be installed under the dash or vertically on the center console. Choose
a location that does not impair visibility or interfere with driving. Also take
into consideration the routing and length of the lead wires and cables to
the power source, antenna, and/or optional external speaker.
CAUTION: Extreme care should be exercised when drilling into
the dash to avoid damage to under dash electronic ignition,
cruise control, instrument and/or accessory wiring.

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Model MXT275
1. Using the mounting bracket as a
template, mark the location of each
screw hole under the dash. Use a
nail or other sharp pointed object to
mark the hole locations.
2. Attach the bracket to the dash with
the Phillips head sheet metal screws
provided. Tighten the screws
securely. DO NOT OVER-TIGHTEN.
3. Slide the radio into the mounting
bracket. BE SURE the mounting
bracket retainers engage the slots
in the sides of the radio to prevent
movement while driving.
Installing the Mounting Bracket
in the sides of the radio to prevent
movement while driving.

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Model MXT275
Installing the Antenna
The MXT275 includes a “magnetic mount” antenna, intended to be
attached to the vehicle’s roof, trunk or similar location. Speci c installation
requirements vary between vehicles. Use the following guidelines to install
the antenna.
*Where you locate your antenna affects performance.*
Some general rules for antenna location that can aid radio
performance:
1. Metal surfaces covered by  berglass or vinyl may affect radio range.
Avoid these locations.
2. Mount the antenna as high on the vehicle as possible. The higher the
better.
3. If possible, mount the antenna in the center of whatever surface you
choose.
4. The antenna cable is 19.7 feet (6 meters) long. Be sure the mounting
location will allow for connection of the cable to the radio.
5. Be sure the mounting location is clean and dry before installing the
antenna.
6. Route the antenna cable through an accessible entry point, such as a
rear door or trunk opening.
7. When routing the antenna cable inside the vehicle, keep the cable
away from noise sources, such as the ignition system, gauges, etc.
8. Exercise care to prevent cable damage. Make use of existing gaskets,
grommets and weather stripping to protect the cable along its route.

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Model MXT275
Electrical and Rear Panel Connections
Refer to Rear Panel Connections for rear panel connector locations.
NOTE: Radio antenna is installed separately.
1. The power cord supplied with the MXT275 is equipped with a cigarette
lighter adapter for easy installation. Simply plug the connector into the
vehicle’s cigarette lighter. If a “hard-wired” installation is desired, connect
the power cord to the vehicle’s electrical system as follows:
▪Cut the power cord just after the cigarette lighter adapter.
▪Connect the positive lead (RED wire with in-line fuse holder) to
either (a) the fuse block or (b) directly to the positive post of the
vehicle’s battery.
NOTE: The fuse block is usually the most convenient connection
point. The power cord positive lead can also be connected to the
accessory terminal on the fuse block or ignition switch, so the radio
automatically turns off when the ignition is turned off.
▪Securely connect the ground lead (BLACK wire) directly to the
vehicle’s metal frame. A good direct metal-to-metal ground is
essential for optimum performance.
2. Attach the antenna cable to the ANT jack on the rear panel.
3. If desired, an optional external speaker (purchased separately) can be
connected to the EXT SPKR jack (see Using an External Speaker).
Connecting the Microphone
Insert the RJ45 connector into the front of the MXT275. The microphone
mounting bracket can be attached to the vehicle dash or other convenient
location in a manner similar to the radio’s mounting bracket.

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Model MXT275
Microphone Operating Controls
1. LCD Display
2. Speaker/Microphone Jack
3. MENU - Press to access the menu
4. CALL - Press to send a call signal
5. Volume Buttons - Press to adjust the volume of the radio.
Using an External Speaker
The MXT275 provides a rear-panel jack for connection of an optional
external speaker (purchased separately).
When selecting an external speaker, ensure the speaker has 8-ohm
impedance and is rated for 4.0 watts.
NOTE: When an external speaker is connected, the radio’s internal
speaker is automatically disabled.
CONTROLS AND INDICATORS

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Model MXT275
6. Lock - Press and hold to lock the keypad
7. Mic - Built-in Microphone
8. WX - Press and release the WX button to enter the Weather Radio
Mode
9. MON - Press and release the MON button to activate the Monitor
Function
10. Scan - Press and release the Scan Button to activate the Channel
Scan Function
11.Transmit/Receive Indicator - Light is red when you are transmitting a
signal, the light is green when receiving a signal
Microphone Operating Controls (cont)
1 2 3
4
1. Channel Down Button
2. Power Button
3. Channel Up Button
4. Push to Talk Button

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Model MXT275
Front Panel Connections
1. Microphone Jack
2. USB-C Port
Back Panel Connections
1. ANT Jack - SO-239 UHF connector for external antenna (included)
2. EXT SPKR Jack - 3.5mm audio connector for optional external speaker
(purchased separately) (see Using an External Speaker for
specications).
3. 13.8V DC Cable - 2-wire DC connector for 12V DC nominal input power
connection
1
2
3
1 2

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LCD Display
12
1. Channel Icon - Shows the selected transmit/receive channel.
2. Receiving Icon - Indicates the radio is receiving a transmission
from another user.
3. Repeater Icon - Shows the selected transmit/receive repeater
channel.
4. Transmitting Icon - Indicates the radio is transmitting to another
user.
5. CTCSS Icon - Indicates a Continuous Tone Coded Squelch
System.
6. Transmit Power Level Icon - Indicates the Power Level Setting.
7. DCS Icon - Indicates a Digitally Coded Squelch Privacy Code has
been enabled for the currently selected channel.
8. Scanning Icon - Indicates the “auto-scan” function is active.
9. Key Lock Icon - Indicates KEY LOCK mode is on.
10. NOAA Weather Band Icon - Indicates when the radio is in the
Weather Band mode.
11. Monitor Icon - Indicates when the radio is in monitor mode.
12. Signal Strength - Indicates the strength of the current transmit or
receive signal.

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Model MXT275
OPERATING YOUR RADIO
About Range
Your MXT275 is designed to give you maximum operating range under
optimal conditions.
Optimal conditions for maximum operating range are:
▪Over water
▪In open rural areas without obstructions
▪On at areas where you can see the other radio user
To ensure you get maximum range:
▪Be sure to mount the antenna (included) as high as possible on your
vehicle
▪Be sure to set your radio to use High power (see Selecting the
Transmit (TX) Power Level)
Maximum Range / No Sight Obstruction
Medium Range / Partial Obstruction to Line of Sight
Short Range / Major Obstruction to Line of Sight

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Model MXT275
Power On/Off
To turn the radio on and off:
1. With the radio off, press and hold the Power Button. You will hear a tone
when the radio is on.
▪The LCD display will show all icons for one second and then display
the most recently selected channel.
2. With the radio on, press and hold the Power Button.
▪The LCD display will go blank when the radio turns off.
Selecting the Active Channel
IMPORTANT! To communicate between two radios, both radios must
be set to the same channel and Privacy Code (see Selecting a Privacy
Code) selections.
To Select the Active channel:
1. Be sure the radio is turned on (See Power On/Off)
2. Press and release the Channel Up button on the microphone to
scroll forward through the available channels. Press and release the
Channel Down button on the microphone to scroll backward
through the available channels.
▪The Channel icon on the LCD display will show the active channel.
▪To make the repeater channels selectable, see Activate Repeater
Channels.
Adjusting the Volume
1. Press and release the Volume Up button to increase the volume
2. Press and release the Volume Down button to decrease the volume

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Transmitting and Receiving a Call
IMPORTANT! To communicate between two radios, both radios must
be set to the same channel and Privacy Code (see Selecting a Privacy
Code) selections.
To transmit and receive a call:
1. Be sure the radio is turned on (see Power On/Off)
2. To transmit a call, press and hold the PTT button on the microphone,
and speak into the microphone in a normal voice.
NOTE: For maximum clarity, hold the microphone 2 to 3 inches from your
mouth when speaking.
▪The TX icon will show continuously on the LCD display while
transmitting.
3. To receive a call, release the PTT button on the microphone.
▪The RX icon will show on the LCD display when your radio is
receiving a transmission.
4. If necessary, press the Volume Up or Volume Down buttons to
increase or decrease the radio volume.
UTILITY FUNCTIONS
Utility functions let you congure several operational parameters of the
MXT275 to suit your personal preferences. For additional functions, see
“MENU” MODE FUNCTIONS.
Locking the Keypad
You can use the keypad “lock” function to prevent accidentally changing
your radio’s settings. When the function is enabled, the current radio
settings are “locked” in place.
NOTE: When the “lock” function is enabled, the PTT button, Volume
Buttons and the Call Button on the microphone remain active.

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Model MXT275
To “lock” and “unlock” the keypad:
1. Be sure the radio is turned on (see Power On/Off)
2. Press and hold the Lock button for three seconds.
▪The Keypad Lock icon will show on the LCD display when the
keypad is “locked.”
3. Repeat steps 1 and 2 to “unlock” the keypad.
▪The Keypad Lock icon will turn off when the keypad is “unlocked”.
Using Monitor Mode
Monitor mode lets you check for activity on the current active channel. You
can also use Monitor mode to adjust the volume of your radio when not
receiving a signal.
To enter and exit Monitor mode:
1. Be sure the radio is turned on (see Power On/Off).
2. Be sure you have selected the desired channel (see Selecting the
Active Channel).
3. Press and release the Monitor button to enter Monitor mode. (the
display will show the Monitor icon if the radio channel is busy).
▪You will hear any activity on the current selected channel.
4. Press and release the Volume Buttons to increase or decrease the
volume.
5. Once the volume has been adjusted to the desired level, press and
release the Monitor button to exit Monitor mode.

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Scanning for Active Channels
Your MXT275 includes an “auto-scan” mode that continuously scans all 15
available channels for activity.
To enter and exit “auto-scan” mode:
1. Be sure the radio is turned on (see Power On/Off).
2. Press and release the Scan button to enter “auto-scan” mode.
▪The Scanning icon will show on the LCD display when the radio is
in “auto-scan” mode.
▪Your radio will rapidly scan through the 15 available channels and
will pause on any active channel.
▪“Auto-scan” will resume when there has been no activity on the
current channel for four seconds.
3. To transmit during “auto scan,” press and hold the PTT button on the
microphone while the radio is paused on the desired channel.
▪The radio will remain on the active channel for three seconds after
the PTT button is released.
4. To exit the “auto-scan” mode, press and release the Scan button.
▪The Scanning icon will turn off when the radio is no longer in
“auto-scan” mode.
NOAA Weather Radio/Scan
Your MXT275 has a NOAA Weather Radio function, to enable the user to
receive weather reports from designated NOAA stations. Your radio also
has a NOAA Weather Scan function, to enable the user to scan all 10
channels for the NOAA National Weather Service.
To enter and exit Weather Scan
1. Press and release the Weather button to enter weather mode.

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Model MXT275
2. The radio will then scan all 10 weather channels and will lock on to the
strongest weather channel in your area.
3. Use the Channel Up or Channel Down on the microphone to force the
radio to re-scan the weather channels while the radio is in scan mode.
▪Pressing the Scan button takes the radio out of scanning mode,
locking in the active channel. Press and release the Scan button to
reactivate weather scan.
4. Press the PTT to exit Weather Mode.
To Manually Set the Weather Channel:
1. With the Weather Scan activated, press the Scan button to exit
scanning mode.
▪The Weather icon and active channel will stop ashing and will
continuously be displayed on the LCD.
2. Using the Channel Up or the Channel Down buttons on the
microphone, manually set the active weather channel.
To Enable Weather Alert:
1. With Weather mode activated, press the Scan button to exit scanning
mode.
▪The weather icon and active channel will stop ashing and will
continuously be displayed on the LCD.
2. Use the Channel Up or Channel Down on the microphone to select the
desired Weather Channel.
3. Press and hold the Weather button to turn the Weather Alert on.
▪The weather icon will begin ashing.
4. To return to GMRS mode, press and release the weather/PTT button.
▪When a Weather Alert goes off, the MXT275 will sound a siren.
Pressing any button on the mobile will take you to the assigned
weather channel and you will be able to hear the weather alert. If the
siren stops prior to you entering the weather mode, the mobile will
automatically take you to weather mode.

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MENU MODE FUNCTIONS
The “Menu” mode provides access to the features and functions shown in
the chart below. For additional utility functions, see UTILITY FUNCTIONS.
Pt - Privacy Tones - Use this option to set the privacy code.
tC - Transmit Privacy Tone/Code -Use this option to set the transmitter
privacy code on repeater channels.
rC - Receive Privacy Tone/Code - Use this option to set the receiver
privacy code on repeater channels.
Pr - Transmit Power Level - Use this option to change the transmit power
level to High or Low.
Sq - Squelch Sensitivity - Use this option to adjust squelch sensitivity.
rb - Roger Beep - Use this option to set the option for the Roger Beep.
CA - Call Alert Tone - Use this option to select the Call Alert tone.
bP - Silent Operation - Use this option to set the option for the keypad
audible “beep” tones.
rP - Repeater Channels - Use this option to set the option for Repeater
channels.
db - Display Background - Use this option to select the color of the
display background.
Selecting a Privacy Code
Continuous Tone Coded Squelch System (CTCSS) and Digitally Coded
Squelch (DCS) are systems that allow several users to share the same
channel without disturbing each other. When CTCSS or DCS is enabled
for a selected channel, the channel is muted to all incoming signals unless
they carry the correct CTCSS or DCS tone.
Standard Channel Menu Quick Reference Chart
Re
peater Channel Menu Quick Reference Chart

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When a transmission with the correct tone is received, the mute is
removed and the voice audio can be heard. When the transmission ends
the channel is muted again. Transmissions that do not have the correct
tone are not heard.
The MXT275 has 142 Privacy Codes (38 CTCSS codes and 104 DCS
codes), which can be applied to any channel. If desired, you can select
a different Privacy Code for each channel. See CTCSS Privacy Codes
Frequency Chart and DCS Privacy Codes Chart for lists of available
Privacy Codes.
IMPORTANT! To communicate between two radios, both radios must be
set to the same channel (see Selecting the Active Channel) and Privacy
Code selections.
To select a Privacy Code:
1. Press and release the Menu button to a place the radio in “Menu” mode.
2. Use the Volume Up or Volume Down button to scroll through the menu
options until the LCD display shows Pt, then press the
Lock button.
3. Use the Volume Up or Volume Down button to select the privacy tone
type you would like to use: oF, Ct, or dC
4. Press the Lock button to conrm your selection.
▪The (for CTCSS) or (for DCS) icon will show on the LCD
display, according to your selection.
5. Use the Volume Up or Volume Down button to scroll forward or
backward through the available Privacy Codes until the desired Privacy
Code is shown on the LCD display.
NOTE: DCS Privacy Codes 100-104 are shown on the LCD display as
A0-A4.
NOTE: Selecting a Privacy Code of “oF” will disable the Privacy feature.
NOTE: On repeater channels, the transmitter and receiver privacy codes
are set independently using the tC and rC menus.