Model MXT400 CONTENTS FEATURES..............................................................................4 FCC NOTICE..........................................................................5 Exposure To Radio Frequency Energy......................5 INSTALLING YOUR RADIO Preparation for Installation.........................................................6 Installing the Mounting Bracket..................................................7 Installing the Antenna..........................................
Model MXT400 “MENU”MODE FUNCTIONS Transmit (TX) Function.............................................................19 Talk Around (Talk) Function......................................................19 Voice Compander (Comp) Function.........................................20 Silent Operation (Mute) Function.............................................20 Call Alert (Call) Function...........................................................20 Time Out Timer (TOT) Function..................................
Model MXT400 WELCOME TO THE WORLD OF MIDLAND RADIO Congratulations on your purchase of a high quality MIDLAND product.Your MXT400 2-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 finest components. The circuitry is all solid-state and mounted on a rugged printed circuit board.
Model MXT400 FCC NOTICE The MXT400 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 or RP15-22, which comprise the GMRS channels of the MXT400. Serious penalties may result from unlicensed use of GMRS channels, in violation of FCC rules, as stipulated in the Communications Act’s Sections 501 and 502 (amended).
Model MXT400 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 specifications for your vehicle before beginning installation. Generally, you have a negative-ground system if the negative (-) battery terminal is connected to the motor block.
Model MXT400 Installing the Mounting Bracket 1. Using the mounting bracket as a template, mark the location of each screw hole. Use a nail or other sharp pointed object to mark the hole locations. 2. Attach the bracket with the supplied self-tapping screws. Tighten the screws securely. DO NOT OVERTIGHTEN. 3. Determine the best suited position for using the radio, then insert and tighten the supplied SEMS screws. midlandusa.
Model MXT400 Installing the Antenna To get the best range from the MXT400 an external antenna (50Ω) should be used. The antenna is intended to be attached to the vehicle’s roof, trunk or similar location. Specific installation requirements vary between vehicles. Use the following guidelines to install the antenna. *Where you locate your antenna does make a difference.* 1. Metal surfaces covered by fiberglass or vinyl may affect radio range. Avoid these locations. 2.
Model MXT400 Electrical and Rear Panel Connections Refer to Rear Panel Connections for rear panel connector locations. NOTE: Radio antenna is installed separately. Connecting the Radio to a Power Source 1. 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.
Model MXT400 Using an External Speaker The MXT400 provides a rear-panel jack for connection of an optional external speaker (sold 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.
Model MXT400 LCD Display 1 Medium Power 7 Keypad Lock 2 Low Power 8 Compander 3 Auto Power Off 9 Signal Strength 4 Repeater Offset 10 Receiver Active 5 CTCSS Privacy Tone 11 Channel Name 6 DCS Privacy Tone 12 Repeater Channel Microphone Controls 4 1. Channel Down 2. Channel Up 3. PTT (Push to Talk) midlandusa.
Model MXT400 Rear Panel Connections 1. External Power Jack - Connection Terminal for optional power cable (sold seperately). 2. EXT SPKR Jack - 3.5mm Audio connector for optional external speaker (sold seperately) (see Using an External Speaker for specifications). 3. ANT Jack - SO-239 UHF connector for external antenna (sold seperately) Page 12 midlandusa.
Model MXT400 OPERATING YOUR RADIO About Range Your MXT400 is designed to give you maximum operating range under optimum conditions.
Model MXT400 Power On/Off To turn the radio on and off: 1. With the radio off, quickly press and release the Power On/Off button to turn the radio on. The LCD display will display the Midland welcome screen and then display the most recently selected channel. ▪▪ 2. With the radio on, press and hold the Power On/Off button to turn the radio off. The LCD display will go blank when the radio turns off.
Model MXT400 ▪▪ The TX Indicator will show continuously on the LCD display while transmitting. 3. To receive a call, release the PTT button on the microphone. ▪▪ The Busy icon will show on the LCD display when your radio is receiving a transmission. 4. If necessary, rotate the Volume Knob to increase or decrease radio volume. Locking the Keypad You can use the keypad “lock” function to prevent accidentally changing your radio’s settings.
Model MXT400 3. Press and hold the Scn/Mon button to enter Monitor mode. ▪▪ You will hear any activity on the current selected channel. 4. Rotate the Volume Knob to increase or decrease radio volume. 5. Once the radio volume has been adjusted to the desired level, press and hold the Scn/Mon button to exit Monitor mode. Scanning for Active Channels Your MXT400 includes an “auto-scan” mode that continuously scans all 15 GMRS channels for activity. To enter and exit “auto-scan” mode: 1.
Model MXT400 UTILITY FUNCTIONS Utility functions let you configure several operational parameters of the MXT400 to suit your personal preferences. For additional operational functions, see “MENU” MODE FUNCTIONS. 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.
Model MXT400 To select a DCS Privacy Code: 1. Press the TS/DCS button twice to enter the DCS Privacy Code settings. 2. Use the Channel Knob to scroll forward or backward through the DCS Code options until the LCD displays the privacy code desired. 3. Press the Select button to confirm your selection. The DCS icon will show on the LCD display, according to your selection. ▪▪ 4. Press the Scn/Mon button to exit Privacy Code settings.
Model MXT400 “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. MXT400 “Menu” Mode Quick Reference Chart Off ~ 9 Transmit (TX) Function You can disable the transmitter section of the radio if you desire to use the radio as a receive only system. To set the Transmit Function 1. Press and hold the Menu button for 3 seconds to enter the Menu Mode. 2.
Model MXT400 To set the Talk Around Function 1. Press and hold the Menu button for 3 seconds to enter the Menu Mode. 2. Use the Call or Plvl buttons to scroll through the Menu options until the LCD displays TALK. 3. Turn the Channel knob to select the setting you desire. 4. Press and release the Select button to confirm your choice. 5. Press the Scn/Mon button to exit the Talk Around Function.
Model MXT400 To set the Call Alert Tone 1. Press and hold the Menu button for 3 seconds to enter the Menu Mode. 2. Use the Call or Plvl buttons to scroll through the Menu options until the LCD displays Call. 3. Turn the Channel knob to select the setting you desire. 4. Press and release the Select button to confirm your choice. 5.
Model MXT400 Squelch Sensitivity The MXT400 has adjustable squelch sensitivity. The minimum squelch level (OF) is the most sensitive, allowing the squelch to open on very weak signals. Setting the squelch to the maximum setting (09) requires very strong signals to open the squelch. To adjust the Squelch Sensitivity: 1. Press and hold the Menu button for 3 seconds to enter the Menu Mode. 2. Use the Call or Plvl buttons to scroll through the Menu options until the LCD displays SQL. 3.
Model MXT400 To set Repeater Channel Function: 1. Press and hold the Menu button for 3 seconds to enter the Menu Mode. 2. Use the Call or Plvl buttons to scroll through the Menu options until the LCD displays REP. 3. Turn the Channel knob to select the setting you desire. 4. Press and release the Select button to confirm your choice. 5. Press the Scn/Mon button to exit the Repeater Channel Function. Restoring The Default Settings You can restore the factory (default) settings for your MXT400 at any time.
Model MXT400 TROUBLESHOOTING GUIDE If you experience difficulties using your MXT400, refer to the following chart to correct common operation problems. If you have a problem which you believe requires service, please call first and speak with a service technician at 816-241-8500. Many problems can be remedied over the phone without returning the unit for service. Problem No Power Solution Check vehicle power source (battery); replace if needed.
Model MXT400 SPECIFICATIONS Channels: 15 GMRS Channels and 8 Repeater Channels Privacy Codes: Operating Frequency: Power Source: Page 25 38 CTCSS; 104 DCS UHF; 462.5500 ~ 462.725 MHz UHF, 462.5625 ~ 467.725 MHz 13.8 VDC Nominal midlandusa.
Model MXT400 CTCSS PRIVACY CODES FREQUENCY CHART (Hz) Code Freq Code Freq Code Freq Code Freq Code Freq 1 2 3 4 5 6 7 8 67.0 71.9 74.4 77.0 79.7 82.5 85.4 88.5 9 10 11 12 13 14 15 16 91.5 94.8 97.4 100.0 103.5 107.2 110.9 114.8 17 18 19 20 21 22 23 24 118.8 123.0 127.3 131.8 136.5 141.3 146.2 151.4 25 26 27 28 29 30 31 32 156.7 162.2 167.9 173.8 179.9 186.2 192.4 203.5 33 34 35 36 37 38 210.7 218.1 225.7 233.6 241.8 250.3 DCS PRIVACY CODE CHART No.
Model MXT400 Page 27 2-Way Radios Weather Radios 2-Way Radios Emergency Crank Radios HD Wearable Video Cameras CB Radios midlandusa.
Model MXT400 ACCESSORIES Accessories can be purchased at midlandusa.com midlandusa.
Model MXT400 FCC Warnings and Statements IMPORTANT! Changes or modifications 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 qualified technicians. This device complies with Part 15 of the FCC Rules.
Model MXT400 LIMITED WARRANTY (United States and Canada) Subject to the exclusions set forth below, Midland Radio Corporation will repair or replace, at its option without charge, any Midland FRS/GMRS which fails due to a defect in material or workmanship within One Year following the initial consumer purchase. This warranty does not apply to water damage, battery leak, abuse or misuse of unauthorized accessories, unauthorized service or modification or altered products.
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MIDLAND RADIO CORPORATION 5900 Parretta Drive Kansas City, MO 64120 Call 816.241.8500 We’d love to hear from you! Let us know what you think of your new Midland product at: or by visiting us at: midlandusa.com Note: Features and Specifications are subject to change without notice. MIDLAND RADIO CORPORATION is not responsible for unintentional errors or omissions on its packaging.
