HM35 Series – User’s Manual Midland Model 70-3350 Vehicular VHF Transceiver Model 70-5445 Vehicular UHF Transceiver User’s Manual Copyright © 2004 by Midland Radio Corporation; all rights reserved. This device complies with part 15 of the FCC Rules Operation is subject to the following two conditions: 1. This device may not cause harmful interference, and 2. This device must accept any interference received, including interference that may cause undesired operation. Rev. 2.
HM35 Series – User’s Manual FCC RF EXPOSURE The FCC has adopted a safety standard for human exposure to RF energy. Proper operation of this radio under normal conditions results in user exposure to RF energy below the Occupational Safety and Health Act and Federal Communication Commission limits. Mandatory Safety Instructions to Installers and Users: This radio is NOT approved for use by the general population in an uncontrolled environment.
HM35 Series – User’s Manual In this manual… 1 2 GENERAL INFORMATION FOR THE HM35 SERIES.................................................................................... 5 ABOVE ALL… SAFETY! ................................................................................................................................ 6 2.1 2.2 2.3 2.4 3 Conventions and Symbols Used in This Manual........................................................................................................... 6 Warnings ...
HM35 Series – User’s Manual 10.3 10.4 10.5 10.6 10.7 10.8 10.9 11 Locking microphone’s keypad..................................................................................................................................... 25 Signal reception attenuator ......................................................................................................................................... 26 Talk Around....................................................................................................
HM35 Series – User’s Manual 1 GENERAL INFORMATION FOR THE HM35 SERIES This user’s manual describes the standard functions of the HM35 series of vehicular transceivers, available in different versions which vary according to frequency band. HM35 is a robust vehicular radio “SYSTEM” equipped with highly advanced functions that have been designed for ease of use and flexibility for various needs, thanks to “Flash EEProm” technology.
HM35 Series – User’s Manual 2 ABOVE ALL… SAFETY! 2.1 Conventions and Symbols Used in This Manual Notes such as this one indicate practical advice that we recommend following for simplified use of the device, and for optimal performance. Warning symbols such as this one indicate a crucial description for avoiding serious inconvenience, possible damage to the device, and potential danger to yourself or other persons. • The names of buttons and keys are written in bold.
HM35 Series – User’s Manual 2.3.b Installation • Installation and removal of the radio should be carried out only by experienced technicians. The information found in this manual are meant solely as a complement to the experience held by the technician, who should assume full responsibility for the installation.
HM35 Series – User’s Manual 3 PARTS OF THE RADIO AND THEIR USE 3.1 Front panel 1 8 2 7 3 4 5 6 [1] Display - constantly displays the operating status of the device and guides the use of various functions through a series of icons and messages. [2] On/Off-Volume knob – used for turning the radio on/off and for adjustment of reception volume. [3] Microphone socket – this RJ type socket connects the standard hand-held (MK06/35) or keypad microphone (MK06/35-K) to the radio.
HM35 Series – User’s Manual [10] Input/output connector – for connection to the external speaker and for activation of external devices. For connections, refer to Par. 13.1. [11] Antenna socket - this SO 239 (UHF) socket is for connecting a suitable antenna. Another option is to use a BNC-type connector. For further details, please contact your local vendor. Rev. 2.
HM35 Series – User’s Manual 4 CHECKING THE PARTS 4.1.a (a) Package contents Transceiver (b) Power cable (c) Vehicle bracket with screws and knobs for mounting (d) Mounting piece for microphone, with screws (e) User’s manual (this manual!) Depending on the model, some parts may already be attached/connected to the device. If any parts are missing or damaged, contact your vendor as soon as possible. 4.1.
HM35 Series – User’s Manual 5 ADVICE FOR INSTALLATION WARNING! Installation of this device must be performed by qualified persons who are equipped with the proper tools. The information provided below are designed solely as a complement to the experience held by the technician, who should assume full responsibility for the installation. Incorrectly installing the transceiver may seriously damage the device or cause damage to people or property.
HM35 Series – User’s Manual When used in a vehicle, the radio offers optimal performance when the antenna is installed at the center of the roof, in a vertical position that is free of obstacles. 5.3 Connections A faulty connection (or connection with an unapproved device) can seriously damage the transceiver, as well as people or objects. For further details, refer to the service manual and/or to the CTE International technical office. 5.3.
HM35 Series – User’s Manual 6 BASIC OPERATIONS IMPORTANT! One or more functions among those described from this point onwards can be rendered inactive by your radio network administrator, and depending on the radio’s programming. For this reason, you may find you are not able to access one or more of the functions, or that some functions may differ from the below descriptions.
HM35 Series – User’s Manual 3) Press menu/↵ to access the sub-menu. SQUELCH will appear on the display, and a horizontal bar will show the level of squelch intervention currently being used. 4) Hold down the button until the background noise is continuous. 5) Now press the button to gradually increase the level of squelch intervention, stopping as soon as the noise disappears. 6) Wait for a few seconds to ensure the noise has disappeared stably.
HM35 Series – User’s Manual 6.7.b Busy Channel Lock Out (BCLO) Activation of this function impedes the use of the PTT button when the channel is busy. Depending on the programming, the BCLO can act when it picks up any signal, or when a signal is coming from a specific CTCSS/DCS signal. This setting is not available by the end user. For further details, please contact your radio network administrator. 6.7.
HM35 Series – User’s Manual 7 USE OF COMMANDS/OPTIONS 7.1 How to navigate the command menu Refer to the following diagram.
HM35 Series – User’s Manual 7.2 Summary table for the command menu The following table summarizes the functions of each sub-menu/setting available on your radio. Each submenu/setting will be explained in detail, and its location can be found by referring to the last column of this table.
HM35 Series – User’s Manual 7.3 Menu diagram menu/↵ Radio Param Monitor Squelch Power Loc/Dist TlkAround Mic.Sens. Scrambler Int.Spkr Off 7.4 Calls Scan Call 1 Call 2 User Call Emergency Scanning Scan esc Chan Del Edit List Home chan Lcd&Keypad Contrast Light Keypad Micr. Pad Lock Switches PA Aux.Out Alarm Meanings of display icons Icon Meaning Monitor is activated Signal received contains correct CTCSS/DSC See par: 6.6 9.
HM35 Series – User’s Manual sql l/d pow Activates scrambler Locks the keypad of the keypad mike (MK03535-K) Activates the regulation of squelch level Adjusts contrast Adjusts brightness Activates auxiliary output Sends a call to the priority channel Activate/ deactivates local/distance mode Adjusts microphone sensitivity Selects high/low power Key not assigned Deletes a channel from the scan list Inserts a channel in the scan list Sends an emergency call Activates the MK0635-K mike Displays the predefine
HM35 Series – User’s Manual 8 CUSTOMIZATION This section describes the settings that regulate various parameters, depending on environment and specific use of the radio; for example, display contrast, backlighting, etc. 8.1 Adjustment of microphone sensitivity Normally, the sensitivity of the microphone allows the user to speak at a distance of up to 10 centimeters from the microphone.
HM35 Series – User’s Manual 8.4 Exclusion of internal speaker If your transceiver is connected to an (optional) external speaker, you may wish under some conditions to use only the external speaker, and exclude the internal one. To do this: 1) Press the menu/↵ button to access the command menu, then use the option. buttons to highlight the Radio Param. 2) Press menu/↵ to view the sub-menus available. 3) Press the buttons until the Int.
HM35 Series – User’s Manual 9 USE WITH CTCSS/DCS AND/OR SELECTIVE CALLS 9.1 Reception In this operating mode, your radio is programmed so that the audio is activated only when receiving a correct CTCSS/DCS and/or selective call signal. The audio will thus remain silent until you receive a correct CTCSS tone, a correct DCS code, and/or a valid selective call.
HM35 Series – User’s Manual 4) Press the buttons until Call 1 or Call 2 is highlighted, then press menu/↵ to make the call. The device will automatically return to the standby screen. 9.2.c Sending a variable selective call The selective variable is only available through the keypad microphone (mod. MK06/35-K). If the channel has been programmed to emit a selective variable, a * symbol will appear on the bottom left of the display, followed by the predefined variable digits.
HM35 Series – User’s Manual 10 ADVANCED FUNCTIONS 10.1 Channel scanning This function is particularly helpful when multiple channels have been programmed. It allows you to follow radio traffic, as well as to respond to calls from different channels. When the radio picks up a valid signal during scanning, it pauses on that channel and communication is heard on the speaker. When the signal ends, scanning begins again automatically.
HM35 Series – User’s Manual 10.1.d Changing the channel scanning list You can use this function to create a personalized scanning list and to set a priority channel that is different from the pre-programmed one. 1) Ensure that scanning is not activated. 2) Press the menu/↵ button to access the command menu, then use the buttons to highlight the Scan option. 3) Press menu/↵ to view the available sub-menus. 4) Press the buttons until the Edit List sub-menu is highlighted.
HM35 Series – User’s Manual To reactivate the keypad, follow the procedure outlined above (at step 4, remove the ). When the keypad is locked, the On/Off-Volume knob, the microphone PTT, and some function keys will still remain active (depending on the device’s programming). 10.4 Signal reception attenuator If you are in an area where radio signals are too strong (e.g., near a high-powered repeater or transmitter), you may find that these signals saturate your receiver, reducing performance.
HM35 Series – User’s Manual 6) Exit the sub-menu by pressing the F4/ESC button, then press it a second time to exit the main menu and return to the standby screen. To deactivate the scrambler: 1) Ensure your receiving party has also deactivated their scrambler. 2) Follow the procedures outlined above. At step 5, remove the symbol. 10.7 Audio amplifier (PA function) It is possible to use the transceiver’s audio amplifier to drive an external speaker and amplify your voice.
HM35 Series – User’s Manual 5) Exit the sub-menu by pressing the F4/ESC button, then press it a second time to exit the main menu and return to the standby screen. A faulty connection to the Input/Output socket may seriously damage the transceiver. Rev. 2.
HM35 Series – User’s Manual 11 CLEANING AND MAINTENANCE 11.1 Maintenance of the radio Aside from the normal cleaning and connection efficiency check, your radio does not require any particular maintenance. As with all electrical devices, your radio requires periodic laboratory testing, otherwise its performance cannot be guaranteed. For further details, contact your radio network administrator or CTE International technical office. 11.1.
HM35 Series – User’s Manual 12 OPTIONAL ACCESSORIES Optional accessories can be used to expand the range of functions available with your radio. We are constantly developing new options for you, and are pleased to list below the accessories we currently offer: • MK06/35 standard microphone – microphone for general use, with PTT transmission button.
HM35 Series – User’s Manual 13 CONNECTIONS 13.1 Input/Output rear connector The following table outlines the connections from the rear Input/Output (DB25) connector: N. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 Signal name AUX OUT EXT SPEAKER FLAT UN-SQ RX AUDIO DE-EMPH-SQ RX AUDIO RX MUTE INPUT TX AF IN PTT OUTPUT EXTERNAL PTT SELCAL VALID RSSI LEVEL CDS SIGNAL HANG UP GND GND EXT SPEAKER + Spare 2 Spare 1 Output 12V 100 mA max.
HM35 Series – User’s Manual 14 ALPHABETICAL INDEX Advanced functions Auxiliary output ........................................................... 25 Channel scanning ....................................................... 22 Keypad lock ................................................................ 23 PA audio amplifier....................................................... 25 Rx attenuator .............................................................. 24 Scrambler........................................
