Microair Avionics Pty Ltd
Contents
1. Line Wire Power amp Ground Tefzel 18 awg wire Intercom Tefzel 22 awg wire PTT Tefzel 22 awg wire Memory Tefzel 22 awg wire Signal Ground Tefzel 22 awg wire Speaker Tefzel 22 awg single core shielded Microphone Tefzel 22 awg single core shielded Headphone Tefzel 22 awg single core shielded Aerial RG58C U 50 ohm Coaxial Cable All wiring is connected by soldering to the DB15 connector Strip the insulation back 2mm 1 16 and tin the exposed conductor with solder Slide a 5mm length of 3 2mm 1 16 heatshrink tubing over the end of the wire After checking the wiring diagram for the correct pin number push the tinned end into the terminal and solder into place Check the soldered joint has been made by gently pulling on the wire Slide the heatshrink tubing down over the soldered pin to completely cover the conductor Tinned wire Soldered with heatshrink Locking bolts tightened Cover the soldered joints with the grey plastic backshells Ensure that the locking bolts are in place before closing the backshells Connect to the rear of the radio with a push fit and secure the locking bolts top and bottom The M760 can be wired in several different configurations to suit the various needs The wiring diagrams located in Appendix A cover the most commonly used variations Microair recommends the use of its pre wired M760 harness The harness is available from Microair and comes compl2. The operator should remember that the minimum operating voltage is 10 volts This is the loaded voltage ie the voltage when the radio is transmitting For battery operators check the battery voltage level then press the PTT briefly to note the voltage drop If the voltage dips by more than 0 5 volts change the battery before flying 760 install amp user manual ver N doc Page 9 of 24 8 December 2003 Microair Avionics M760 Transceiver Installation amp User Manual 4 7 Microphone The M760 can be operated with an Electret Insert or Amplified Dynamic microphone These alternatives cover most aviation headsets and hand microphones When the PTT is pressed both microphones are live To reduce background noise the M760 can be installed with relays across the mic lines and the PTT line to allow on one microphone at a time to operate refer appendix A This reduces background noise when transmitting For operators wanting to use a dynamic microphone a mic amplifier must be used Microair recommends the installation of the Microair MD Ola amplifier This amp is compatible with 150 600 ohm dynamic microphones LINES TO DYNAMIC MIC OR MIC JACK LA E L l CONNECTOR MIC END MIC SIGNAL LINE 1 9 VOLTS WA Lf MD 0la CONNECTOR RADIO END TL D CRIMP TERMINALS GROUND 4 8 Speaker Microair recommends using a speaker of 4 ohms impedance rated at a minimum of 5 watts Microair recommends the SP01 Box Speak
3. 760 install amp user manual ver N doc Page 21 of 24 8 December 2003 Microair Avionic M760 Transceiver Installation amp User Manual 10 0 Appendix C Drilling Template Drilling Template 760 install amp user manual ver N doc Page 22 of 24 8 December 2003 Microair Avionic M760 Transceiver Installation amp User Manual 11 0 Limited Warranty Microair Avionics Pty Ltd warrants this product to be free from defects in E ZS materials and workmanship for 1 year from the date of purchase or the Ca minimum period described by applicable consumer law SY Por e If the unit is installed by an organisation which holds an avionics L mA L installation approval from the local Civil Aviation Authority and that organisation has co signed and dated the warranty card the warranty MICR A OR period shall be deemed to commence from the date of installation The customer shall be responsible for any transportation costs for return of this product to Microair Pty Ltd This warranty does not cover failures due to abuse misuse accident unauthorized alteration or repairs carried out by parties other than Microair or an approved Microair service centre This warranty does not cover failures where the product has not been installed or operated in accordance with the provisions of the User and Installation manual s It shall be at Microair Pty Ltd s sole discretion to decide if a defect is a result of material or work
4. 5 6 Toggle Switch The toggle switch is a push down switch When pushed down briefly the active and standby frequencies exchange places Hold the toggle key down for 3 seconds to activate the scan function EE 760 install amp user manual ver N doc Page 14 of 24 8 December 2003 Microair Avionics M760 Transceiver Installation amp User Manual 6 0 Memory Programming The M760 has 25 programmable memories for storing commonly used frequencies Use the mode switch to move the display to the program mode The word PROG will appear on the top line with the memory number on the right hand side On the lower line is the currently stored frequency in that memory The cursor can be cycled through the MHz KHz and memory number by pressing the frequency adjust knob Move the cursor to the memory number and select the memory number for programming by rotating the frequency adjust knob Press the frequency adjust knob to move to the MHz section Rotate the frequency adjust knob to scroll to the desired value Press the frequency adjust knob to move to the KHz section Rotate the frequency adjust knob to scroll to the desired value Cycle cursor between program number MHz and KHz by pressing the frequency adjust knob inwards briefly Rotate the frequency adjust knob to change value With the memory number and frequency set to the correct values press down the toggle switch briefly The word STORE appears briefly on the
5. ATEOS THL NOLLO Y HINHIL NI NO AA WLINSIMOM GA OL Pav NOLLOS ASOFDIUXILOPFDPIGNY Lid HL SXLON Mob m ww ow arasso ODD D ROTO LION HIONTA SA IIdICTH L D D HOT IA GIU HIONTA ld re SEFDIHATVHH IOMO IAB TAM IO TIO A At axwomiciam Long SINOBITAHE ICT ODA TIROS ION AROS TSAM quada NISLTOA 9T 0T OL CXGXT TOS da STALNA AHL SIS FHL 404 TIMATA AOLIANNOD 51 39 anor MIDA LOI MIDA T 0T AONA NITI 11i a Grain ION DIMIN 9 Grain ION NOM ANADAI STA LVI 8 December 2003 Page 18 of 24 760 install amp user manual ver N doc M760 Transceiver Installation amp User Manual Microair Avionics MAO DELS CONNEC IDH MICROPHONE 1 HOT WIEED 2 MI ROPHOHE E HOI WIRED t INTERCOM i HOT WED PII Z LEDEACELESHITH Z 10 16 VOLIS IN 2 10 16 VOLIS IN DB 15 CONNECTOR VIEWED FOR THE SIDE THE WIRES ARE SOLDERED TO INTERCOM ONOFF SWITCH PILOT HEKDFHCHES MERONE PILOI MICEOFHCHE MI ROPHOHE COHIOIMEROPHONE cO RIO game S COPLOIPII D S CO PILOI MEMCE Y BUT ICH LA gd COPILOTINTERCOM LA POLI Ptr E z FILO MEMCEY BUTTON a por INTERCOM H CABIN SPEAKER NOTES THE PTT AND REMOTE MEMORY BUTTON ARE TO BE MOMENTARY ON IN THEIRACTION THE SPEAKER CAN BE EITHER A OR OHM BUT SHOULD BE MINIMUM 5 WATTS POWER FUSING SHOULD BE MINIMUM3 AMP AND NOT GREATER THAN 10 AMP DYNAMIC MICROPHONES WILL REQUIRE THE
6. MD 014 AMPLIFIER TO CORRECT OPERATION THE INTERCOM AND BACKLIGHTING SWITCHES ARE SPST ON OFF SWITCHES 10 16 VOLTS IN GROUND MUSIC GROUND MUSE SGHAL ha DO lan U D ra MUSIC AUDIO MAY BE WIRED IN PARALLEL WITH THE HEADPHONE AUDIO THE MUSIC SIGNAL LEVEL SHOULD BE TYPICALLY 100 2600 OHMS MICROAIR M760 REV N TRANSCEIVER WIRING DIAGRAM PTT OPERATION FOR TRANSMIT AND INTERCOM WARNING REVERSE POLARITY OR OVERVOLTAGE WILL INJURE THE M760 AND VOID THE WARRANTY 8 December 2003 Page 19 of 24 760 install amp user manual ver N doc M760 Transceiver Installation amp User Manual Microair Avionics SiLld JO NOILVW3dO AV TA INV 3D VIG ONT WSAISOSNWHI N ATY 0921 ST VO HITA SWHO 0095 t DOT ATTE ILALA TINOHS TAAT TOIS JISAMAHL DIA NOHA TTH HLHI ETT ITA HI TA S AW OITA IN ALINTI AHL TOA ONY ON A LAN TA SFL TAHA YO AIDTVIOd ASAT OH dng 9 HI LAS AXOVNO Logg SHHILIMSANILHSITAIV A ANF WNOJWXLNISHI 5 TYMOLS ILEAN OWNED ASA DY Ol N HL WALI LON ANY DT E OMNIA TINOHSANISHA Mod SL S WWII 29 TT10HS INA WHO 40 WAHAHA Hv2JGDIVSdSNHI HOLLJV WAHI NINO AWVINGNONOS OL ATT NOLIN AMONIO INF LIdNHLI annows NI SITOA 9 01 OLGA TIO SAT SATA SILON SIHISGISSHL HO TIA OW E YO LINDI 51 44 ae b WAYS MEVA d oO OLNE ADAMS 3 1030 O 414 JONA C 114101402 o O NOLINE AYORA IJORA a gf HAAS 430040 PICOHRLAL SENOMIDWZH JODA SERA oros HAH a E O szw
7. 4 of 24 8 December 2003 Microair Avionics M760 Transceiver Installation amp User Manual 3 0 Description The M760 VHF Transceiver has a 57mm 2 4 round face to fit a standard small instrument hole The case is 59mm high x 65mm wide x 135mm long M PRIORITY SQUELCH 97 ON OFF VOL ACTIVE e PUSH KHz UP DOWN a ol J 5 6 7 Front Face Rear Face ITEM CONTROL DESCRIPTION 1 M4 Machine Screw 2 Priority Switch Momentary push down switch 3 Volume On Squelch Click On Rotate knob for volume Rotate ring for squelch 4 Receiver Transmit Annunciator Red Green LED 5 Mode Switch Momentary push down switch 6 Frequency Adjust Rotate for MHZ adjust Push briefly to change to KHZ Rotate for KHZ adjust y Toggle Switch Momentary push down switch 8 DB15 Connector Push in fit with lock nuts 9 BNC Coaxial Connector 10 LCD Display Two lines of eight characters each 7760 install amp user manual ver N doc 8 December 2003 Microair Avionics M760 Transceiver Installation amp User Manual 4 0 Installation 4 1 Physical Installation The M760 is very simple to physically install in an aircraft s instrument panel Select or cut a 57mm 2 Ys instrument hole for mounting Present the M760 to the rear face of this hole The stepped round face will insert through the hole and should appear flush with the front of the instrument panel when
8. Microair Avionics Microair Avionics Pty Ltd Airport Drive Bundaberg Queensland 4670 Australia Tel 61 7 41 553048 Fax 617 41 553049 L ssrmd e mail sales microair com au Microair Avionics M760 Transceiver Installation amp User Manual About This Document This manual describes the various installation configurations available for the Microair M760 Transceiver The Transceiver s controls and design features are described and illustrated 4 ZAS 4 Microair reserves the right to amend this manual as required to reflect any enhancements or upgrades to the M760 Transceiver Microair Avionics Pty Ltd CAY b A x PRIORITY SQUELCH ON OFFIVOL ACTIVE PUSH KHz UP DOWN MICROAIR M760 ACCESSORIES Wiring Harness Boom Microphone Speaker Box Dynamic Microphone Amplifier CURRENT REVISION STATUS Revision Date Change K 31 01 2000 Initial release L 18 11 2001 Additional install data and wiring diagram added M 04 10 2002 Additional wiring diagram added N 08 12 03 Updated for revision N 760 install amp user manual ver N doc Page 2 of 24 8 December 2003 Microair Avionics M760 Transceiver Installation amp User Manual Table of Contents 1 0 Introduction 2 0 Unpacking 2 1 User Install Manual 2 2 Warranty Card 2 3 Authorised Release Certificate 3 0 Description 4 0 Installation 4 1 Physical Ins
9. airframe An alternative antenna for non metal airframes is the Ground Plane independent dipole This antenna is physically similar to the Ya wave whip but has a small stubbie antenna pointing downwards from the antenna base The stubbie section of the antenna takes the place of the ground plane and simplifies installation Beware of fabric surfaces with silver dope finishes The silver dope is a conductive surface and with screen antennas which are mounted internally Backlighting The backlighting is activated by taking input supply voltage to pin 8 This line can be individually switched outside the DB15 connector to enable the backlighting to be turned off If the backlighting is wired but not switched the backlighting will come on when the master switch is turned on The aircraft may be started with the radio off but with the backlighting active without the possibility of injury to the radio The backlighting line from pin 8 may be taken to a dimmer The backlighting consists of 4 LED s behind the LCD display which operate on 1 14 volts The backlighting cannot be seen below 3 volts Power Savings For installations operating from a battery only Microair recommends saving battery power by NOT wiring the backlighting do NOT wire pin 8 The backlighting will draw an additional 80mA of power This nearly doubles the standby power demand Not connecting the backlighting can effectively double the running time on your battery
10. ate the ring clockwise to increase the squelch threshold and counter clockwise to lower the threshold When the squelch is broken ie the static hiss can be heard the annunciator LED lights green Note This does NOT mean you are receiving a signal Annunciator LED The LED operates red or green and indicates the following states Clear off Radio is squelched above the threshold and is not receiving a signal Green Squelch is broken or a signal is received Red Radio is transmitting Flashing Red Radio has transmitted for over 40 seconds warning The flashing red signal may draw the user s attention to the fact that the aircraft may have a stuck PTT button Transmissions in excess of 30 seconds should be avoided 760 install amp user manual ver N doc Page 12 of 24 8 December 2003 Microair Avionics M760 Transceiver Installation amp User Manual 5 4 Mode Switch The mode switch is a push down switch When pushed down briefly the radio will step to the next operating mode The M760 has four operating modes 5 4 1 Toggle mode The display shows the active or in use frequency on the top line The standby frequency is displayed on the bottom line 5 4 2 Memory Mode The top line displays the memory or MEM number and the lower line displays the frequency for that memory The displayed memory becomes the frequency the moment it is displayed The user can scroll through the programmed memories by rotating the fr
11. correctly positioned Rotate the M760 to align the four M4 machine screws For installations where the existing instrument panel screw holes are 1 8 the hole will need to be enlarged to 5 32 to fit the M4 machine screws Insert and tighten all four M4 machine screws The M760 requires no rear support the M4 screws provide all of the physical mounting required BNC CONNECTOR N WIRING HARNESS NO REAR SUPPORT REQUIRED 9 eececvve EN DB 15 CONNECTOR p d 4 MIC GAIN TRIM POT SIDETONE TRIM POT n M4 MACHINE SCREWS 57MM Q 1 4 INSTRUMENT HOLE MICROAIR MA 760 PANEL INSTALLATION The M760 should be located in the aircraft within view of the pilot seated in the pilot in command position and afford this pilot good access to the front face controls Do NOT oversize the mounting holes in the front face of the radio to an imperial size Drilling will damage internal components Do NOT replace the M4 machine screws supplied with the radio with longer screws Over length screws will touch or even crush internal components and cause damage Either of these actions will void the warranty 760 install amp user manual ver N doc Page 6 of 24 8 December 2003 Microair Avionics M760 Transceiver Installation amp User Manual 4 2 Electrical Installation Microair recommends the use of the wiring in the table below for the various parts of the radio harness
12. equency adjust knob or by pressing the remote memory button 5 4 3 Program Mode The MEM is replaced with PROG on the top line The frequency stored in each memory can be set changed or cleared in this mode refer memory programming 5 4 4 Scan Mode By holding down the toggle switch for 3 seconds the M760 goes into scan mode The programmed memories are cycled quickly across the display The M760 checks each memory in turn for any signal If there is no signal the radio moves to the next programmed memory When a signal is detected the scan locks to that memory to receive the signal This memory is held for 10 seconds after the signal finishes to afford the user an opportunity to reply on that memory channel The user can stop the scan operation by pressing down briefly the toggle key or the PTT button 760 install amp user manual ver N doc Page 13 of 24 8 December 2003 Microair Avionics M760 Transceiver Installation amp User Manual 5 5 Frequency Adjust Knob The standby frequency can be changed by scrolling the frequency adjust knob Rotate knob to scroll the MHz half of the standby frequency Press the knob in briefly to move the cursor to the KHz half of the standby frequency Rotate the knob again to scroll the KHz The cursor will remain where it was lasted toggled Only the standby frequency can be changed directly the active frequency cannot be directly altered by the frequency adjust knob Cursor
13. er The SP01 has a durable thick film plastic cone of 4 ohms and is rated at 5 watts The SPO1 is fitted with a mounting bracket and is supplied with clips and screws Check your speaker choice by ensuring the audio is clear up to at full volume 760 install amp user manual ver N doc Page 10 of 24 8 December 2003 Microair Avionics M760 Transceiver Installation amp User Manual 4 9 Intercom The M760 utilises the sidetone facility to produce a hot mic intercom This means the mic s are live at all times to the pre set levels of the sidetone and the mic gain Both pilot and co pilot can speak and be heard at all times Hot mic operation is not a VOX system where the mic s only come on when a pre set noise threshold is reached ie when you speak the mic comes on It is therefore important to ensure that the sidetone and mic gain are set to the correct levels so that the mic s do not pick up large amounts of ambient noise The sidetone and mic gain are pre set in the factory to levels which should suit most general aviation needs Microair recommends that mic muffs be fitted to all microphones as a principal way of reducing the pick up of ambient noise The intercom facility is enabled by grounding pin 5 This can be done via a switch to turn the intercom on and off If after installing and trying the intercom there is too much background ambient noise re set the sidetone and the mic gain in the follow
14. ete with all switches sockets buttons and mounting hardware Separate lines have been wired for Pilot and Co pilot Headphone Microphone PTT Remote Memory Intercom ON OFF 760 install amp user manual ver N doc Page 7 of 24 8 December 2003 Microair Avionics M760 Transceiver Installation amp User Manual 4 3 4 4 Coax Termination The coax is cut to length and terminated in a BNC connector Soldered or crimp type connectors are preferred to the solderless variety as they have lower signal loss and better shielding 6 5mm 1 4 Step 1 GH mu m 3 2mm 1 8 1 6mm 1 16 4 Step mm Step 3 Ed Step 4 mmm BNC Termination Microair recommends using only soldered or crimped BNC connectors Solderless BNC connectors are NOT recommended as their performance is not high enough for VHF transmissions Antenna For certified aircraft the M760 should only be operated with a TSO compliant antenna The antenna may be Lo wave whip or wave dipole using 50ohm coaxial cable and a BNC connector for connection The VSWR should ideally be less than 2 1 across the 118 000MHz to 136 975MHz airband For non certified aircraft using a non TSO compliant antenna the VSWR must be checked to ensure the ratio does NOT exceed 3 1 across the 118 000MHz to 136 975Mhz airband The M760 will tolerate a VSWR of 5 1 without injury to the transceiver but the performance is severely deteriorated Do not use
15. he squelch and eliminate the hiss The LED annunciator light will go clear It may be necessary to readjust the squelch with the engine at full power as the ignition noise increases dramatically The intercom volume is pre set and not affected by the volume knob refer Intercom section on page10 The M760 can now be adjusted to the correct active and standby frequencies by scrolling and pressing the frequency adjust knob The M760 will transmit when the PTT button is held down The LED annunciator will light red When transmitting the user will hear themselves speaking through their own headphones via the sidetone system If the transmission lasts longer than 40 seconds either because you have a lot to say or because the PTT has stuck the LED annunciator will flash red When this happens check the PTT immediately If you find no obvious fault turn the radio off and then on again If the LED is still red turn the radio off and leave it off Remote Memory Button If fitted at installation the remote memory button will allow the user to toggle exchange the active and standby frequencies The remote memory button is typically mounted next to the PTT on the stick SE If the user elects to operate in memory mode the remote memory button will step through the programmed memories If the Remote memory button is held down for 5 seconds the M760 will go into scan mode and automatically scroll through the programmed memories sea
16. ing way 4 9 1 Sidetone 1 Connect headset s to the radio Turn down headset volume to minimum Close sidetone trim pot by turning fully counter clockwise Speak into microphone with a constant Laaaa tone and increase the sidetone by turning clockwise Stop when good volume is heard Test this level with the headset volume to maximum A e 4 9 2 Mic Gain Connect headset s to the radio Start engine and listen to ambient noise If ambient noise is too high turn down mic gain with a SMALL counter clockwise turn When the noise is down to an acceptable level make a test transmission to another radio If the audio quality of the transmission is too weak the mic gain must be increased KEE Please refer to the figure below to see how the trim pots are adjusted The trim pots have a total movement of only 270 degrees 3 4 turn The heads of the trim pots are plastic and can be distorted or broken off unless adjusted with great care A small straight blade screwdriver with an insulated shaft is required Ensure the radio is turned off before punching the hole under the black dot and probing for the slot in the head of the trim pot Once the screwdriver is engaged on the trim pot the radio can be turned on and the adjustment made Mod status 190 Mic Gain A e Sidetone STRAIGHT BLADE SCREWDRIVER WITH INSULATED SHAFT SA UY y O INCREASE DECREASE NOTE TOTAL TRIMPOT MOVEMENT IS 270 DEGREES ROTATION Do no
17. manship failure THE WARRANTIES AND REMEDIES CONTAINED HEREIN ARE EXCLUSIVE AND IN LIEU OF ALL OTHER WARRANTIES EXPRESSED OR IMPLIED INCLUDING ANY LIABILITY ARISING UNDER WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE STATUARY OR OTHERWISE THIS WARRANTY GIVES YOU SPECIFIC LEGAL RIGHTS WHICH MAY VARY FROM STATE TO STATE AND COUNTRY TO COUNTRY IN NO EVENT SHALL MICROAIR AVIONICS PTY LTD BE LIABLE FOR ANY INCIDENTAL SPECIAL INDIRECT OR CONSEQUENTIAL DAMAGES WHETHER RESULTING FROM THE USE MISUSE OR INABILITY TO USE THIS PRODUCT OR FROM DEFECTS IN THE PRODUCT To obtain warranty service CALL the Microair Avionics Support line in Australia Phone 61 7 41 553048 Fax 61 7 41 553049 Email support microair com au Contact Microair Avionics for instruction on the return of product for service or repair Please ensure that you are able to supply the date of purchase product type reference serial number method of return and date of return All product returning to Microair Avionics should be marked clearly PRODUCT RETURNING TO COUNTRY OF ORIGIN FOR WARRANTY SERVICE REPAIR AND WILL BE RE EXPORTED Address to either Microair Avionics Pty Ltd Microair Avionics Pty Ltd PO Box 5532 Airport Drive Bundaberg West Bundaberg West Queensland 4670 Queensland 4670 Australia Australia Microair may at it discretion refer product returns for repair or service to a service facility closest to you Microai
18. nd electrical protection Enclosed with the radio are User Install Manual Warranty Card CASA form 1 release certificate DB15 solder plug and backshell User Install Manual Please read this manual completely before attempting to install or operate this radio There are several installation options you may wish to consider which are clearly laid out in the installation section The M760 has all of the basic radio operations and many other management and programming options which are described in the operation and memory sections of this manual Warranty Card Please complete the warranty card and post it back to Microair The obvious benefit is to ensure your 12 month warranty is recognised refer to the limited liability warranty statement on the back cover of this manual Another benefit of returning the card is it allows Microair to send you service data directly should the need arise Microair monitors all feedback on its products Should the need arise to alert or advise customers of a potential problem good installation ideas or things to avoid Microair will despatch a service bulletin to the customer address list on file Authorised Release Certificate The CASA form 1 release note is an internationally recognised document which clearly identifies the part component the form 1 is associated with Please keep this certificate with the aircraft s file or log book 760 install amp user manual ver N doc Page
19. onadvzn 1014 MOLLZGN MO2 EX 09 9 8 December 2003 Page 20 of 24 760 install amp user manual ver N doc Microair Avionic M760 Transceiver Installation amp User Manual 9 0 Appendix B Specifications Specifications Radio Type Channels Frequency Selection Frequency Display Frequency control Memories Scan Function Power consumption Input Voltage Power output VSWR Tolerance Receiver sensitivity Receiver Selectivity Squelch Threshold Speaker volume output Headset volume output Temperature range Stability Dimensions Exposed dial face Weight Amplitude Modulation AM Aircraft Transceiver 760 channels 25KHz spacing 118 000 136 975MHz VFO dial 2 line alpha numeric LCD display with backlighting PLL frequency synthesis which is microprocessor controlled Memory is store in non volatile EPROM 25 programmable memories with scan function On programmed memories only scan rate 3 memories second Receive no signal 86mA Transmit 16A 10 16 Volts Warning damage will occur above 16 Volts 4 watts nominal 5 12dB for 1 0 uV 30 modulation KHz audio 70dB 0 SuV full squelch range 0 5 3 5uV Nominal 4 watts output to 4 ohms Nominal 100milli watts output to 600 ohms 30 60 degrees Celsius 3 00ppm W 65mm H 59mm D 135mm plus 35mm for harness W 2 60 H 23 D 5 3 plus 1 5 for harness 57mm diameter 2 4 diameter 400 grams 19 4 ounces
20. r Avionics Pty Ltd reserves the right to repair or replace the unit or software or offer a full refund of the purchase price at it s sole discretion SUCH REMEDY SHALL BE YOUR SOLE AND EXCLUSIVE REMEDY FOR ANY BREACH OF WARRANTY 760 install amp user manual ver N doc Page 23 of 24 8 December 2003 Supplied by
21. rching for a signal To terminate the scan operation the PTT is pressed briefly The remote memory button is highly recommended It allows the user to be able to keep hands on the controls during flight while changing channels or scanning 760 install amp user manual ver N doc Page 16 of 24 8 December 2003 Microair Avionics M760 Transceiver Installation amp User Manual 8 0 Appendix A Wiring Diagrams Standard Wiring Includes remote memory intercom and backlighting switches along with cabin speaker PTT Operation Include a mode switch to allow the PTT button to be used for either transmit or intercom PTT Relay Operation Includes the use of two relays across both mic ines and the PTT line to allow only one microphone at a time to operate 760 install amp user manual ver N doc Page 17 of 24 8 December 2003 M760 Transceiver Installation amp User Manual Microair Avionics ALNI AA GHI IOA INY 09M SELL FANN TIKA AVL TOARDIAO 20 AI TIV TOd AATA 2 NINA WAL NOLLYTTY LSNI Ca INVIS JUVXDVIO ODNTAILA NHAISOSNW3LL N ATAI 09 HIYO SHHO 0099 DOT ATTTIHAL 44 Cd 1NOHS THAD I THAIS 2IS IL FHL DICO Y SHOHdQVSH FHL HLL TAT Wad NI Ga Sd AYTO IO DISC SSHALIAS LIVNO LSdS TAIF SAHILINS INLET INY FLOZ DLLNI THL NOLL v gan LITROS OL AUTE 10 FHL TAIN aa TIA SANOHAOMIDT 2 IPTE RU T DY Ol NEL XLIVGDEO LON ONY g t E Pip Hd Aa 0 1N0HS ANENA ATAO SILIYA S POMPINI A TIQOHS L S WHO 8310 t ATHLE SH NYA
22. t attempt to adjust the modulation or power output These adjustments can only be set correctly by a qualified technician Adjustment of the power output or modulation by anyone other than Microair or their approved agent will void the warranty 760 install amp user manual ver N doc Page 11 of 24 8 December 2003 Microair Avionics M760 Transceiver Installation amp User Manual 5 0 Control Functions 5 1 5 2 5 3 Priority Switch The priority switch is a push down switch When pushed down briefly the radio will go into memory mode and select the frequency stored in memory 25 Memory 25 should be considered the priority channel which the user can quickly select when required Memory 25 must be programmed for the priority switch to operate Memory 25 is set at the factory as the international distress frequency 121 500MHz Memory 25 can be programmed the same way as any of the other channels refer memory programming hence the factory default can be edited Volume Squelch Knob The M760 is turned on by rotating the volume knob A positive click is heard and felt at the start of the rotation to indicate the on off position The volume is increased by rotating the knob clockwise and decreased by rotating counter clockwise The squelch is adjusted by rotating the ring behind the volume knob There is no automatic level set for the squelch however the ring affords a large manual adjustment to suit all situations Rot
23. tallation 4 2 Electrical Installation 4 3 Coax Termination 4 4 Antenna 44 1 Metal Skin Airframes 4 4 2 Non Metal Skin Airframes 4 5 Backlighting 4 6 Power Savings 4 7 Microphone 4 8 Speaker 4 9 Intercom 4 9 1 Sidetone 4 9 2 Mic Gain 5 0 Control Functions 5 1 Priority Switch 5 2 Volume Sguelch Knob 5 3 Annunciator LED 5 4 Mode Switch 5 4 1 Toggle mode 5 4 2 Memory Mode 5 4 3 Program Mode 5 4 4 Scan Mode 5 5 Frequency Adjust Knob 5 6 Toggle Switch 6 0 Memory Programming 7 0 Operation 7 1 Remote Memory Button 8 0 Appendix A Wiring Diagrams 9 0 Appendix B Specifications 10 0 Appendix C Drilling Template 11 0 Limited Warranty Un Con e o o A Ch O Ra ha Fe Lm ROO pu N 12 12 12 13 13 13 13 13 14 14 15 16 16 17 21 22 23 760 install amp user manual ver N doc Page 3 0f 24 8 December 2003 Microair Avionics M760 Transceiver Installation amp User Manual 1 0 Introduction Thank you for purchasing this Microair product The M760 is a 760 channel VHF aircraft transceiver packaged to fit a standard 57mm 2 44 instrument hole The M760 has been produced in accordance with CASA APMA approval E2000 004 2 0 Unpacking 2 1 2 2 2 3 The M760 is boxed in polystyrene for physical protection and wrapped in an anti static bag for electrical protection Once the box is opened and the radio unwrapped the owner is responsible for physical a
24. the stubbie rubber duckie antennas meant for use with handheld radios Where the cable length for the coaxial cable exceeds 15m 45 feet the RG 58C U cable should be replaced with RG 213 U cable At 15m the RG 58C U has approx 3dB loss 50 power where the RG 213 U has only 1 5dB 75 power For situations where maximum radio output power is essential use only RG 213 U 760 install amp user manual ver N doc Page 8 of 24 8 December 2003 Microair Avionics M760 Transceiver Installation amp User Manual 4 4 1 Metal Skin Airframes For metal skin aircraft a Ya wave whip is the easiest antenna to fit Ensure that the antenna base and the coax shield are firmly grounded to the skin of the airframe on the inside of the aircraft Ensure that any anti corrosion product which may be used to seal the exterior surface does not isolate the antenna base from the airframe For best performance the whip should be straight and vertical when mounted on the airframe 4 4 2 Non Metal Skin Airframes 4 5 4 6 For non metal airframes a Ya wave whip may still be used but a ground plane must be installed on the inside face of the aircraft skin The ground plane should ideally be circular and have a diameter of half the height of the whip The ground plane should be fabricated from a lightweight metal eg thin aluminium sheet or adhesive foil tape For best performance the ground plane should be flat and horizontal when mounted on the
25. top line To clear a memory scroll to the desired memory and press down the priority switch briefly The word CLEAR appears on the top line The user can now move to another memory for programming Press the frequency adjust knob to move the cursor back to the memory number and scroll to next memory for programming When all programming is complete press the mode switch to move on from the program mode back to the active standby toggle display When operating in memory mode the programmed channels can be scrolled through by rotating the frequency adjust knob or by pressing the remote memory button Only programmed memories are displayed Operating the priority switch in either toggle or memory mode will move the M760 to memory 25 The user should consider carefully what frequency to program in memory 25 The factory default is the distress frequency 121 500MHz 760 install amp user manual ver N doc Page 15 of 24 8 December 2003 Microair Avionics M760 Transceiver Installation amp User Manual 7 0 Operation 7 1 The M760 should always be turned off before starting the aircraft to protect the radio from transient voltages After starting the radio can be turned on and the squelch adjusted so the static hiss can be heard through the headphones The LED annunciator will light green while the hiss is heard Use the hiss tone to adjust the volume to an appropriate level With the volume set turn the squelch ring to break t
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