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Alan HM135 Service Manual

Mobile vhf transceiver
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HM135
Service Manual
ALAN HM135
Mobile VHF Transceiver
Service Manual
Copyright  2004 by CTE International Italy; all rights reserved
Preliminary version
Page 1 of 13

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  • Page 1 HM135 Service Manual ALAN HM135 Mobile VHF Transceiver Service Manual Copyright  2004 by CTE International Italy; all rights reserved Preliminary version Page 1 of 13...

  • Page 2: Table Of Contents

    HM135 Service Manual Contents TECHNICAL SPECIFICATIONS........................3 Test methods.................................3 Specifications table ...............................3 CIRCUIT DESCRIPTION ..........................4 General information...............................4 Microprocessor/control ..............................4 2.2.a PTT circuit ................................4 Front panel (head) circuitry ............................5 VCO / Synthesizer (PLL) ...............................5 2.4.a Temperature-Compensated Crystal Oscillator (TCXO) ..................5 2.4.b Voltage-Controlled Oscillators ..........................5 2.4.c...

  • Page 3: Test Methods

    HM135 Service Manual ECHNICAL SPECIFICATIONS 1.1 Test methods ETS 300-086 / ETS 300-113 (optional “modem board”) IEC 529 IP54 and MIL STD 810 C/D/E 1.2 Specifications table General Characteristic Units Value/Measurements conditions Frequency from 136 to 174 Operating Band Number of Programmable Channels...

  • Page 4: Circuit Description

    HM135 Service Manual 2 CIRCUIT DESCRIPTION 2.1 General information The HM135 is basically divided into 2 printed circuit boards: Main board and Head. Circuitry and signals can be divided in the following sections: Microprocessor/control Front panel (head) circuitry VCO / Synthesizer (PLL)

  • Page 5: Front Panel (Head) Circuitry

    HM135 Service Manual 2.3 Front panel (head) circuitry The microprocessor DD800 runs off a 8 MHz oscillator which is composed of X800, and R829. DD800 is basically used to control the LCD unit XT80, to decode the commands coming from the front keypad S801 to S808) as well as to switch the front LEDs DA800.

  • Page 6: Synthesizer

    HM135 Service Manual 2.4.c Synthesizer The PLL IC frequency synthesizer is a large scale monolithic synthesizer integrated circuit DA3. The synthesizer IC contains a dual modular prescaler, programmable divide-by-N counter, prescaler control (swallow) counter, reference divider, phase detector and unlock detector.

  • Page 7: Transmitter Audio Circuits

    HM135 Service Manual 2.5.d Transmitter Audio Circuits The speech audio coming from the MIC connector (line AUX_MIC) is applied to the FET VT804 which acts as sensitivity switch (function high/low MIC sensitivity) in 2 levels and is directly controlled by the microprocessor (pin 27) via the transistor VT807.

  • Page 8: Mixer

    HM135 Service Manual 2.6.c Mixer The mixer LO frequency is 45.1 MHz above the desired receiver frequency. When the receiver frequency is present, the mixer output will be a 45.1 MHz signal. The mixer output is peaked for 45.1 MHz by means of the...

  • Page 9: Ctcss (Continuous Tone Coded Squelch System)/Dcs (Digital Coded Squelch)

    HM135 Service Manual The microprocessor manages the analogue switches for the scrambler as well, which is base-band-inversion type. 2.7.b CTCSS (Continuous Tone Coded Squelch System)/DCS (Digital Coded Squelch) CTCSS signals and DCS signals are synthesized by the microprocessor DD5 (pin 39 - line MCU_CTCSS_DCS_PWM) and appear as PWM, then smoothed by the CTCSS/DCS 300 Hz low pass filter which consists of DA9:A and related circuitry to produce an acceptable sine wave output.

  • Page 10: Adjustments

    HM135 Service Manual DJUSTMENTS 3.1 General Adjustment trimmer potentiometer/capacitors in the HM135 main unit: Ref. Designator Used for… Squelch Level Adj. Frequency Adj. Deviation Balance ( Reference Oscillator Modulation Level) Maximum Deviation Adj. Transmitter Driver Bias Adj. Transmitter Power Amplifier Bias Adj.

  • Page 11: Loading The Firmware

    HM135 Service Manual Radio contains a number of ESD, most sensitive components, without build-in protection are LDMOS RF Power transistors. 1) Check connection between the Front Panel and the Main Unit. 2) Set ON/OFF Volume Potentiometer of the Front Panel Fully CCW (Switched Off) 3) Connect the radio’s Antenna connector to a Communication Tester, preset in Transmitter Measurement mode.

  • Page 12: Setting The Frequency And Vco's Tuning

    HM135 Service Manual 7) Release the PTT. 8) Power Off the radio. Disconnect the short from TP1. Keep the capacitor (step 2 above) connected. 3.7 Setting the frequency and VCO’s tuning. 1) Switch the radio ON 2) Go to CH3 (173.9 MHz) 3) Connect an oscilloscope between TP1 , located in the center of VCO shield, and ground.

  • Page 13: Setting Of The Squelch Level

    HM135 Service Manual 3.10 Setting of the Squelch Level. 1) Switch the radio to CH2, 155.100 MHz. 2) Turn RP1, SQUELCH LEVEL ADJ, until radio opens without signal applied to the antenna input. 3) Connect a SINAD meter to pin 5 of rear DB25 connector. Switch off the CCITT filter the SINAD meter. Connect a RF generator, tuned to 155.100 MHz to the radio’s antenna connector...
  • Page 14 ALAN HM 135 TEST POINTS AND PCB LAYOUTS...
  • Page 15 TEST POINTS TX Pwr Cal. Driver Bias TX PA Bias RX VCO Adj. Squelch level TX VCO Adj. VCO Mod. Adj. Ref. Mod. Adj. Freq. Adj.
  • Page 26 ALAN HM 135 ELECTRICAL DIAGRAMS...
  • Page 27 HM135_HEAD_FEB_14_2004.SCH...
  • Page 37 ALAN HM 135 EXPLODED VIEW AND PART LIST...
  • Page 38 ALAN HM 135 PROGRAMMING MANUAL...
  • Page 39 HM135/HM435 Programmer software guide HM135/HM435 VHF/UHF Mobile Transceiver Programmer Software Guide Preliminary version issued on February 15 2004 Preliminary version Page 1...
  • Page 40 HM135/HM435 Programmer software guide Copyright  2004 by CTE International Italy; all rights reserved. Microsoft, MS and Windows are registered trademarks of Microsoft Corporation. IBM is a registered trademark of International Business Machines Corporation. Screen shots reprinted by permission from Microsoft Corporation.
  • Page 41 HM135/HM435 Programmer software guide CONTENTS ABOUT THIS MANUAL ...........................4 Warning notes ................................4 Conventions and Symbols in this Book .........................4 1.2.a Notes and warnings ............................4 1.2.b Font format................................4 1.2.c Screenshots..............................4 INSTALLATION ...............................5 Unpacking..................................5 System requirements..............................5 Installing programming Software (Programmer)......................5 Connecting the radio with your computer ........................5 PROGRAMMING .............................7...

  • Page 42: About This Manual

    Only authorized and qualified technicians should be allowed to follow the operation described into this manual. This manual has been written for use by CTE International dealers and distributors who are programming the HM135/HM435 mobile transceivers for customers. You should be familiar with conventional radio systems, radio system and radio network settings parameters as well as general PC operation.

  • Page 43: Installation

    Finish button. Windows will restart. 8) When Windows is restarted, the HM135 programmer’s icon appears in Start – Programs – HM135 folder If in the installing procedure you’ll get error messages, copy the software in a temporary directory on your hard disk (e.g. C:\temp), then retry installing the software from the hard disk instead from the CD Please see your computer’s operating instructions if you need help.
  • Page 44 HM135/HM435 Programmer software guide If you need to remove the RJ connector from the transceiver’s microphone socket, unlock it by pushing the side release button of the RJ connector and remove it by grasping the connector itself (not the cable) Please see your computer’s operating instructions if you need help.

  • Page 45: Programming

    LED will steadily glow yellow and the display shows Programming… showing that the radio is switched on in programming mode. In this case you can release the F1 key 3) Click the Start button, point to Programs – HM135 folders, then click HM135 icon 4) The HM35 Programmer’s window will open (blank gray window) The figure shows the blank window under Windows XP 3.2 Selecting the proper COM (serial) port...

  • Page 46: Create A New Programming Filename

    1) If you have just started the programmer software in your PC you will see a blank window. 2) From the menu File select New radio…, then click one of the New HM135 Radio… or New HM435 Radio… (depending on the operating band of the radio to be programmed).
  • Page 47 HM135/HM435 Programmer software guide 3) Go to the Rf Freqs (MHz/KHz) area and select the TX frequency in MHz in the upper box TX by clicking its left drag down button, then click the hundreds MHz you require (e.g. 156 for 156 MHz) 4) Select now the decimal TX frequency in KHz by clicking the right drag down button, then point the decimal frequency you need (e.g.

  • Page 48: Ctcss/Dcs Tx Rx Setup (Ctcss/Dcs Button)

    HM135/HM435 Programmer software guide 12) If you need to add/modify/delete new channels, you have two convenient options: If you need to create a new channel which has completely different parameters, press Add and go back to step 1) If you need to program a new channel that only slightly differs between the current one, you can save time by pressing the Chann.

  • Page 49: Channel Data And Global Data Windows

    HM135/HM435 Programmer software guide HANNEL ATA AND LOBAL INDOWS IMPORTANT! Don’t skip this chapter, otherwise you will loose an important information to keep on programming 4.1 Switching between Channel Data and Global Data windows Starting from now, we’ll need to switch between Channel Data and Global data Windows. Global data window can be recalled at any time by clicking the Global Data button from the Channel Data window.
  • Page 50 HM135/HM435 Programmer software guide 4.2 Structure of Global Data window As you can see, Global Data window is divided into three areas: Set-Up, Set-Up 2 and Tables Set-Up Set-Up 2 Tables The Set-Up area allows you to adjust or The Set-Up 2 area is useful to set up...

  • Page 51: Selective Call Setup

    HM135/HM435 Programmer software guide ELECTIVE ALL SETUP You can define two separate databases for selective calls: one is for TX and the other for RX. Each database can store up to 15 tone sequences, each of them can be programmed up to 20 tones. The radio can be programmed in order to: RX - decode up to two RX sequences (Seq.

  • Page 52: Defining Selcal Tx Parameters

    HM135/HM435 Programmer software guide 7) You have now other available options: if you check Partial Match you will enable to decode the sequence if it partially matches as well. In other words receiving just the tones with a tick in the ID checkbox are sufficient for a full decode operation. With the over stated example, you will accept any sequence beginning with 3 4 0 1 1.

  • Page 53: Defining Rx Standard And Sequences

    HM135/HM435 Programmer software guide 6) Now you have 20 events (from box 1 to box 20) in which you can define the tone sequence you need. Type the related numbers or letters related to the tones you want to send. In the example we typed the format 4 3 0 1 1 F(pause tone) 4 3 0 0 0 0 0.

  • Page 54: Defining Tx Calls: Call1, Call2, Emergency, Transpond And Auto Id (Ani)

    HM135/HM435 Programmer software guide 5.4 Defining TX calls: Call1, Call2, Emergency, Transpond and Auto ID (ANI) 1) Make sure to be on the right RF channel and, from the Selcal setup area, click on TX sequences button: the Channel X Txed Selcal (Emergency) window will open.
  • Page 55 HM135/HM435 Programmer software guide 1) Be sure you are selecting parameters on the right channel, if not please select the right one by clicking on either the button in the Channel num. area in Channel Data window Preliminary version Page 17...

  • Page 56: Manual/Autoreset For Selective Calls

    HM135/HM435 Programmer software guide 2) From the Channel Data window – Monitor / Autoreset area - click the Monitor key behaviour button: the Monitor key behaviour window will open. 3) in the Monitor opens... area, tick the available ckeckbox(es) you need to activate (not available checkboxes will be shaded in gray).
  • Page 57 HM135/HM435 Programmer software guide if you want to use the summary as a programming monitor, click the Update button. It will remain on the screen providing an useful programming monitor. In fact, it can be manually updated every time you press the Update button or automatically after any programming operation you will make as described in par.

  • Page 58: Customizations

    HM135/HM435 Programmer software guide USTOMIZATIONS In this section we’ll explain how to define personal (non-standard) Selcall parameters. Moreover you can define the availability of the menu commands and function keys to the end user in order to boost the customization in order to make the radio better matching with your needs.

  • Page 59: Scanning Configuration (Scan Configuration Button)

    6) The Two-tone paging checkbox enables the said paging standard which is used in the U.S.A. This option is not normally supported in the standard HM135/435 versions and needs to be implemented upon specific request. For further information please contact your dealer.

  • Page 60: Power-On Selcal Auto Sending

    HM135/HM435 Programmer software guide Scan attack time – defines the maximum time which the radio can stay on a channel before automatically restart the scan even if the condition defined at step 2) is not ceased. If this timer is set to OFF, the radio stays on the channel all the time in which the said condition (which stopped the scan) is present PRI channel sampling time –...

  • Page 61: Setting The Transmission Timeout

    HM135/HM435 Programmer software guide 6.4.a Setting the Transmission timeout 1) Click the Tx timeout drag down button and select the maximum transmission time available for the user. 2) Obviously, as soon as you will select a Tx timeout value different than disabled, you will also automatically activate the PTT resume drag down button.

  • Page 62: Setting Procedure

    HM135/HM435 Programmer software guide 6.6.b Setting procedure 1) From the Global Data window - Set-Up area - click the Acoustic signals button: the Acoustic warning manager window will open. 2) Select the event which you want to change the acoustic signal using the related radio button in the Which call area: •...

  • Page 63: Emergency Call Setup

    HM135/HM435 Programmer software guide We recommend, when possible, to leave the monitor ON in order to improve the transceiver’s ease of use. 6.8 Emergency call setup You can better define the radio behavior in emergency state, for example design a fixed emergency channel, how many calls must be transmitted, the pause between calls etc.

  • Page 64: Customizing The Menu And F Keys

    HM135/HM435 Programmer software guide the related drag down button (leave disabled if you don’t need this function) 14) Click the OK button to confirm or Cancel to exit without changing the previous settings 6.10 Customizing the menu and F keys You can make available or not the various menus and submenus in the radio (to be accessed when the M key).

  • Page 65: Final Operations

    1) From the menu File select Save Radio as: the Save Radio database as window will open. 2) Type the file name in the appropriate box (usually called File name:). 3) Define the directory in which you want to store the file (default is C:\Programs\HM135\usrDB), then press the Save button Preliminary version...

  • Page 66: Restoring The Default Signal Database

    HM135/HM435 Programmer software guide 7.3 Restoring the default signal database This option is basically useful in two conditions: When a software upgrade has been performed. The Programmer software is in continuous development in order to add new features to the radio and make your programming operations easier. So if you have just upgraded your software by substituting the “.exe” main file with a new updated one, restoring the default signal database is mandatory.

  • Page 67: Additional Options

    HM135/435 transceiver or open a programming file previously stored in your PC as follows: 8.1.a...

  • Page 68: Index

    HM135 Programmer software guide NDEX System requirements .............5 Channel Data Summary ........18 Manual/Autoreset for selective calls ..... 18 Channel Data window Menu/F keys customization ........26 Autoreset button ............18 Channel bandwidth............9 Monitor Key Behaviour ......... 16 Channel Data Summary button ........18 Channel num.
  • Page 69 HM135 Programmer software guide LCD contrast level ............25 Power on/home channel..........22 Tables PTT pressing while scan ..........21 enabling menus and F keys .........26 scanning condition ............21 Rx tone sequences ............13 scanning timing (speed, priority, wait) ......21 selcal definitions ............20...

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