Microair Avionics Pty Ltd
Airport Drive
Bundaberg
Queensland 4670
Australia
Tel:
+61 7 41 553048
Fax:
+61 7 41 553049
e-mail: sales@microair.com.au
Microair Avionics
M760 Transceiver
Installation & 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.
This is a controlled document and may not be amended,
copied or distributed, without the prior consent of Microair
Avionics Pty Ltd.
© Microair Avionics Pty Ltd
Ensure that the M760 transceiver is switched off during
engine starting and stopping to avoid damage occurring.
CURRENT REVISION STATUS
Revision
K
L
M
N
P
01R3
01R4
01R5
01R6
01R7
01R8
01R9
01R10
01R11
01R12
01R13
01R14
01R15
01R16
Date
31/01/00
18/11/01
04/10/02
08/12/03
01/10/06
13/10/06
30/05/07
28/06/07
3/06/08
08/12/08
25/2/09
24/4/09
24/4/09
13/07/09
30/03/10
01/09/10
20/10/10
04/10/12
20/12/12
M760Q Install & User Manual 01R16
Change
Initial release
Additional install data and wiring diagram added
Additional wiring diagram added
Updated for revision N
Updated for revision P
Updated for proposed functionality of revision P
Proposed functionality for revision P amended
Updated for functionality as of M760_MICRO_1-3-3
Warranty Statement Upgrade
Updated for revision P2
Updated Limited Warranty Statement & deleted Warranty cards
repair@microair.com.au added to Warranty Statement
Updated for revision Q
Additional Installation data added
Drilling template updated
Insert FAQs
Drilling Dimensions added
Memory Delete description added
Specifications updated and additional wiring diagram data added
Page 2 of 40
20th December 2012
Microair Avionics
M760 Transceiver
Installation & User Manual
TABLE OF CONTENTS
1.0
2.0
INTRODUCTION......................................................................................................... 5
UNPACKING ................................................................................................................ 5
2.1
2.2
2.3
USER / INSTALL MANUAL ....................................................................................................... 5
NAMEPLATE DETAILS .............................................................................................................. 5
AUTHORISED RELEASE CERTIFICATE.................................................................................. 5
3.0
INSTALLATION .......................................................................................................... 6
3.1
3.2
3.3
WIRING ......................................................................................................................................... 7
COAX TERMINATION ................................................................................................................ 9
ANTENNA .................................................................................................................................... 9
3.3.1
3.3.2
3.4
3.4.1
3.4.2
3.5
3.5.1
3.5.2
3.6
3.7
3.8
METAL SKIN AIRFRAMES .................................................................................................................................... 10
NON-METAL SKIN AIRFRAMES .......................................................................................................................... 10
POWER ........................................................................................................................................ 11
BACKLIGHTING ..................................................................................................................................................... 11
POWER SAVINGS ................................................................................................................................................... 11
MICROPHONE ........................................................................................................................... 12
ELECTRET ............................................................................................................................................................... 12
DYNAMIC ................................................................................................................................................................ 12
SPEAKER .................................................................................................................................... 12
INTERNAL VOX INTERCOM .................................................................................................. 13
HEADSET ADJUSTMENT......................................................................................................... 13
3.8.1
3.8.2
SIDETONE ................................................................................................................................................................ 13
MIC GAIN ................................................................................................................................................................. 13
3.9
3.10
3.11
3.12
EXTERNAL INTERCOM ........................................................................................................... 14
DUAL COMM INSTALLATION ............................................................................................... 14
AUXILIARY AUDIO .................................................................................................................. 15
DATA INTERFACE (SL30)........................................................................................................ 16
3.12.1
3.12.2
3.13
3.13.1
3.13.2
3.13.3
TRANSCEIVER FUNCTION ................................................................................................................................... 17
TRANSCEIVER STATUS ........................................................................................................................................ 17
NOISE SUPPRESSION ............................................................................................................... 18
POWER FILTER ....................................................................................................................................................... 18
FERRITE CHOKES .................................................................................................................................................. 18
SUPPRESSION CAPACITOR .................................................................................................................................. 18
4.0
OPERATIONAL CONTROLS ................................................................................. 19
4.1
4.2
4.3
4.4
4.5
4.6
4.7
4.8
PRIORITY SWITCH ................................................................................................................... 20
VOLUME / SQUELCH KNOB ................................................................................................... 20
ANNUNCIATOR LED ................................................................................................................ 20
MODE SWITCH .......................................................................................................................... 21
TOGGLE SWITCH...................................................................................................................... 21
FREQUENCY ADJUST KNOB .................................................................................................. 22
REMOTE MEMORY BUTTON ................................................................................................. 23
PUSH TO TALK BUTTON......................................................................................................... 23
5.0
OPERATIONAL MODES ......................................................................................... 24
5.1
ACTIVE/STANDBY MODE....................................................................................................... 24
5.1.1
5.2
5.3
5.4
108 TO 118 MHZ TUNING ...................................................................................................................................... 24
MONITOR FUNCTION .............................................................................................................. 25
CHANNEL MODE ...................................................................................................................... 27
VOX MODE ................................................................................................................................ 28
M760Q Install & User Manual 01R16
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Microair Avionics
M760 Transceiver
Installation & User Manual
6.0
PROGRAM MENU .................................................................................................... 29
6.1
6.2
6.3
6.4
CD LOCKOUT ............................................................................................................................ 29
VOX ............................................................................................................................................. 30
MONITOR SETUP ...................................................................................................................... 30
NEW MEMORY CHANNEL ...................................................................................................... 31
6.4.1
6.4.2
6.4.3
6.5
6.6
6.7
7.0
8.0
9.0
10.0
11.0
12.0
SET FREQUENCY.................................................................................................................................................... 31
SET LOCATION ....................................................................................................................................................... 31
SET SERVICE ........................................................................................................................................................... 31
EDIT MEMORY CHANNEL ...................................................................................................... 32
DELETE MEMORY CHANNEL ................................................................................................ 32
EXIT MENU ................................................................................................................................ 32
FAQ’S........................................................................................................................... 33
WIRING DIAGRAM.................................................................................................. 34
MICROAIR HARNESS ............................................................................................. 35
SPECIFICATIONS M760Q....................................................................................... 37
DRILLING DIMENSIONS ....................................................................................... 38
LIMITED WARRANTY ............................................................................................ 39
M760Q Install & User Manual 01R16
Page 4 of 40
20th December 2012
Microair Avionics
1.0
M760 Transceiver
Installation & User Manual
INTRODUCTION
Thank you for purchasing this Microair product. The M760 is a 760 channel VHF aircraft transceiver, packaged
to fit a standard 57mm (2 ¼”) instrument hole. The M760 has been produced in accordance with CASA APMA
approval E2000-004.
2.0
UNPACKING
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 and
electrical protection.
Enclosed with the radio are: User / Install Manual
CASA form 1 – release certificate
DB15 solder plug and backshell
2.1
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.
IMPORTANT NOTE
This manual may be used as technical data to support an installation
under the FAA form 337 process.
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.
Please refer to the Microair Avionics Website www.microair.com.au for more installation information.
2.2
NAMEPLATE DETAILS
The M760 has a nameplate fixed to the
bottom plate of the chassis.
The Nameplate records the M760’s part
number, revision, and serial number.
Microair recommends the M760 serial
number be noted in the aircraft’s
maintenance records for future reference.
2.3
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.
M760Q Install & User Manual 01R16
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20th December 2012
Microair Avionics
3.0
M760 Transceiver
Installation & User Manual
INSTALLATION
The M760 has a simple physical installation for aircraft instrument panels. Select or cut a 57mm (2 ¼”)
instrument hole for mounting (refer panel drilling template in section 11.0).
For panel locations which do not afford sufficient space behind the radio to reach the connectors, Microair
recommends connecting the wiring harness and coax cable before fitting the radio to the hole in the panel.
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 correctly positioned. Rotate the M760 to
align the four M4 machine screws.
Loose fit all four M4 screws. For installations where the existing
instrument panel screw holes are 1/8”, the holes 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.
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
M760Q Install & User Manual 01R16
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20th December 2012
Microair Avionics
3.1
M760 Transceiver
Installation & User Manual
WIRING
Microair recommends the use of the wiring in the table below for the various parts of the radio harness:
Pin
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
BNC
Line
Pilot Microphone
RS232 RX
Co-pilot Microphone
Dual Comm Suppression
RS232 TX
Auxiliary Audio Input
PTT
Backlighting
Power
Power
Ground
Ground
Memory
Headphone
Speaker
Aerial
Wire
Tefzel 22 awg single core shielded
Tefzel 22 awg two core shielded (with RS232 TX)
Tefzel 22 awg single core shielded
Tefzel 22 awg
Tefzel 22 awg two core shielded (with RS232 RX)
Tefzel 22 awg single core shielded
Tefzel 22 awg two core shielded (with Memory)
Tefzel 22 awg
Tefzel 22 awg
Tefzel 22 awg
Tefzel 22 awg
Tefzel 22 awg
Tefzel 22 awg two core shielded (with PTT)
Tefzel 22 awg single core shielded (Pilot & Co-pilot)
Tefzel 22 awg single core shielded
RG58C/U 50 ohm Coaxial Cable
All wiring is connected by soldering to the DB15 connector. Inspect the solder cup side of the DB15
carefully to determine the pin numbering.
Strip the insulation back 2mm (1/16”), and “tin” the exposed conductor with solder. Slide a 5mm length
of 1.6mm (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 “tinned” solder cup, 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.
Bare Wire
Stripped Wire
Soldered Wire
Tinned Solder Cup
Solder Wire to Cup
Heatshrink
M760Q Install & User Manual 01R16
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20th December 2012
Microair Avionics
M760 Transceiver
Installation & User Manual
Cover the soldered joints with the grey plastic
backshells. Ensure that the thumbscrews are in
place before closing the backshells. Connect to
the rear of the radio with a push fit, and secure
the thumbscrews (top and bottom).
Microair recommends the use of its pre-wired
M760 harness. The harness is available from
Microair, and comes complete with all
switches, sockets, buttons, and mounting
hardware.
Separate lines have been wired for Pilot and
Co-pilot:
•
Headphone
•
Microphone
•
PTT
•
Remote Memory
M760Q Install & User Manual 01R16
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Microair Avionics
3.2
M760 Transceiver
Installation & User Manual
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.
Microair recommends using only soldered or
crimped BNC connectors.
Solderless BNC connectors are NOT recommended,
as their performance is not good enough for VHF
transmissions.
3.3
ANTENNA
For certified aircraft the M760 should only be
operated with a TSO compliant antenna. The
antenna may be ¼ wave whip or ½ 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 on
118.000MHz, 127.000MHz, and 136.975Mhz. The
M760 will tolerate a VSWR of 5:1 without injury to
the transceiver, but the performance is severely
deteriorated.
Do not use the stubbie “rubber duckie” antennas meant for use with handheld radios.
M760Q Install & User Manual 01R16
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Microair Avionics
3.3.1
M760 Transceiver
Installation & User Manual
METAL SKIN AIRFRAMES
For metal skin aircraft a ¼ 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.
Refer to the Microair Avionics website www.microair.com.au for more detail on antennas suitable for
metal skin airframes.
3.3.2
NON-METAL SKIN AIRFRAMES
For non-metal airframes, a ¼ 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 as a minimum, have a
diameter of half the height of the whip. The ground plane should be fabricated from a lightweight metal,
eg thin aluminium sheet. For best performance the whip element should be as vertical as possible.
An alternative antenna for non-metal airframes is the Ground Plane independent dipole. This antenna is
physically similar to the ¼ wave whip, but has a small flexible stub antenna pointing downwards from
the antenna base. The stub section of the antenna takes the place of the ground plane, and simplifies
installation.
Avoid mounting locations which position the antenna parallel to nearby metallic airframe structures such
as tube framing, brackets, ribs, or frames. Metal objects which are close and parallel to the antenna will
adversely affect performance.
If the installation has two radios, the two antennas should be separated horizontally by at least the length
of the antenna. In the case of airband antennas this should be approx 1m (3ft). The further apart the
better.
Beware of fabric surfaces with silver dope finishes. The silver dope is a conductive surface, and will
screen antennas which are mounted internally.
Refer to the Microair Avionics website www.microair.com.au for more detail on antennas suitable for
non-metal skin airframes.
M760Q Install & User Manual 01R16
Page 10 of 40
20th December 2012
Microair Avionics
3.4
M760 Transceiver
Installation & User Manual
POWER
The M760 is designed to operate on a 14V aircraft electrical supply. The radio will operate down to
10.7V on receive.
It is unlikely that a power supply operating below 11V would
have sufficient power to allow clear transmissions.
The M760 will draw up to 1.9A when transmitting.
Low voltage will produce a BURRRRRRRRRR signal on
transmit.
NEVER operate the M760 on voltage exceeding 16V.
Damage will occur if the M760 is operated from power supplies
which exceed 16V, even for very short (transient) periods.
Operation on a supply which exceeds 16V will void the warranty.
The M760 has a FET switch and internal fuse to protect against reverse polarity. If reverse polarity is
applied the internal fuse (4A) will blow. Damage however may not be limited to the fuse.
Please ensure that the correct polarity is observed. The most
common reason for reverse polarity, is misreading the pin
assignments on the DB-15 connector.
Applying reverse polarity to the M760 will void the warranty
Check your wiring! Always check the voltage at the DB15 BEFORE it is
plugged into the radio.
Use a multi-meter to check the voltage at the following pins:
Positive
Positive
Pin 9
Pin 10
Negative
Negative
Pin 11
Pin 12
3.4.1
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.
3.4.2
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.
M760Q Install & User Manual 01R16
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20th December 2012
Microair Avionics
3.5
M760 Transceiver
Installation & User Manual
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 only one microphone at a time to
operate.
3.5.1
ELECTRET
Electret microphones are the most common microphone in use on aviation headsets. They are small in
size, and can have noise cancelling capability. It is important to wire the Electret microphone with the
correct polarity. The Electret will only work if the positive and negative are wired correctly.
Electrets are a high signal device, and do not normally require amplification. Some headset
manufacturers elect to use an amplifier to improve the Electret’s response, and to provide some noise
filtering.
3.5.2
DYNAMIC
Dynamic microphones are a low signal device. A dynamic microphone will not operate directly with an
M760 radio, because of the low signal produced.
For operators wanting to use a
dynamic microphone, a mic
amplifier must be used.
Microair recommends the
installation of the Microair
MD-01a amplifier. This amp is
compatible with 150-600 ohm
dynamic microphones.
LINES TO DYNAMIC MIC
OR MIC JACK
CONNECTOR (MIC END)
MIC SIGNAL LINE
(7-9 VOLTS)
MD-01a
Refer to the Microair Avionics
website www.microair.com.au
for
further
details
on
microphone types, and wiring
configurations.
3.6
CONNECTOR (RADIO END)
CRIMP TERMINALS
GROUND
SPEAKER
Microair recommends using a speaker of 8 ohms
impedance, rated at a minimum of 5 watts. The
speaker is wired to the speaker line (pin 15). Do NOT
attempt to connect a speaker to the headphone line
(pin 14). Likewise do NOT attempt to connect the
headphones to the speaker line.
Microair recommends the SP01 Box Speaker. The
SP01 has a durable thick film plastic cone of 8 ohms,
and is rated at 5 watts. The SP01 is fitted with a
mounting bracket, and 1.5m of screened cable.
Check your speaker installation by ensuring the audio
is clear all the way up to full volume.
M760Q Install & User Manual 01R16
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20th December 2012
Microair Avionics
3.7
M760 Transceiver
Installation & User Manual
INTERNAL VOX INTERCOM
The M760 is fitted with a VOX intercom feature which utilises the sidetone facility of the radio. The
VOX threshold level is controlled in software by use of the VOX Adjust Mode. See section 5.4 to adjust
the internal VOX intercom.
3.8
HEADSET ADJUSTMENT
It is important to ensure that the sidetone and mic gain are set to the correct levels, for best headset
performance. The sidetone level will set the intercom’s headset volume. The mic gain will set the level of
microphone sensitivity for each headset.
Maximum audio volume will vary depending on the impedance (Ohms) of the headphone modules. Most
headsets are fitted with 2 x 300 Ohm modules (600 Ohm total). Some headsets can have headphone
impedance as low as 150 Ohms. The M760 will produce a maximum audio output of 100mW into 150
Ohms. This reduces to 60mW for 300 Ohms and 30mW for 600 Ohms.
3.8.1
SIDETONE
Adjust the sidetone if necessary for good volume level in the headset using the intercom. Ensure that the
headset volume adjust (typically a knob located on the headset ear cup) is set to mid range, so the volume
can be adjusted up/down by the user.
3.8.2
MIC GAIN
Adjust the microphone gain if necessary for best audio “quality” not volume level, when transmitting.
The M760Q is fitted with separate mic gain trimpots to allow for adjustment of individual headsets.
Punch the black dot carefully with a screwdriver blade, to expose the slotted plastic head of the trimpot,
located appox 3mm (1/8”) below the surface of the casing.
Note the position of the slot before making adjustments. Use a small flat bladed screwdriver to make
adjustments before testing with a headset again. The total movement of all trimpots is only 300 degrees
(4/5th turn). The factory setting positions the trimpot slots at 10 O’clock.
M760Q Install & User Manual 01R16
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20th December 2012
Microair Avionics
3.9
M760 Transceiver
Installation & User Manual
EXTERNAL INTERCOM
Where the M760 is to be installed with an external intercom, the internal VOX intercom should be
disabled in the Program Mode Menu. See section 6.2.
Wire only a single mic line (pin 1), along with the PTT (pin 7), the headphone (pin 14), and a ground line
(pin 11 or 12) to the intercom. Follow the intercom manufacturer’s instructions for further installation.
Wire the remote memory line (pin 13), directly to the remote memory button location. This line is
NEVER connected to the external intercom. Refer to the Microair Avionics website
www.microair.com.au for more details and wiring diagrams with commonly used intercoms.
3.10 DUAL COMM INSTALLATION
Where two M760’s are to be installed in the aircraft, the interlock or
suppression lines must be installed. Each interlock line shall be wired from
(pin 4) on the first radio to the PTT line (pin 7) on the second radio, and
vice versa.
The interlock lines allow a radio to sense when the other radio is
transmitting, and deactivate to prevent any chance of damage, or allow
distortion noise to occur.
Microair recommends the use of a clearly labelled rotary selector or multipole switch to switch the microphone and PTT lines Refer to the Microair
Avionics website for additional wiring diagrams ( www.microair.com.au ).
Switching from comm1 to comm2 will move all radio functions
including intercom from one radio to the other. Ensure that both
radios have the internal VOX intercom set up correctly
M760Q Install & User Manual 01R16
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Microair Avionics
M760 Transceiver
Installation & User Manual
3.11 AUXILIARY AUDIO
The M760 Q can accept a line level audio input via pin 6 of the DB15 connector. The volume of this
audio can be set by the auxiliary equipment, but will be muted down to a low level when the VOX
intercom is triggered, or a signal is received. The auxiliary audio will remain muted for approx 1 second
after intercom or receiver activity has finished, before rising again to the set volume.
Do not attempt to feed the speaker output of a car stereo directly into
pin 6. The audio level is too high and will damage the audio system
of the M760, and void the warranty. Input only line (headphone)
level audio.
Pin 6
Audio signal
Pin 11,12
Audio ground
The auxiliary audio input is mono. Most music sources will have a stereo output consistent of left (L) and
right (R) audio channels. L and R audios must be combined before connection to pin 6 of the M760Q.
The auxiliary audio can be used to input the altitude alert warnings from the Microair T2000SFL
transponder.
Pin 6
M760Q Install & User Manual 01R16
Pin 1
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20th December 2012
Microair Avionics
M760 Transceiver
Installation & User Manual
3.12 DATA INTERFACE (SL30)
The M760Q is SL30 compatible, and allows the user to change the active and standby channels from
EFIS equipment. The M760Q can also be put in and out of dual monitor mode if the EFIS equipment
supports this type of function.
Some types of EFIS equipment do not support SL30 in both directions, ie the user can change channels at
the EFIS and the M760 will update, but the user cannot change channels at the radio and have the EFIS
update.
The M760Q supports all modes of SL30 except the frequency list
upload function. All other SL30 comm commands are supported in
both directions.
The SL30 data connection is made via an RS232 data interface:
Pin 2
Pin 5
Pin 11,12
RS232 RX
RS232 TX
Ground
TX
TX
RX
RX
GND
Data Rate:
GND
9600 Baud
8 bit
Parity = none
Stop = 1 bit
Flow = none
The M760 supports the basic SL30 command set for transceiver control.
SL30
Input
Input
Input
Output
Output
Command
Description
$PMRRV24iidda<chksm><CR<LF>
$PMRRV29mka<chksm><CR<LF>
$PMRRV42mka<chksm><CR<LF>
$PMRRV20<chksm><CR<LF>
$PMRRV35mkmkas<chksm><CR<LF>
M760Q Install & User Manual 01R16
Page 16 of 40
Request for Data Output
Set Standby Comm Frequency & Function
Set Active Comm Frequency & Function
Reset function (M760 ready for data)
Comm Transceiver Status
20th December 2012
Microair Avionics
M760 Transceiver
Installation & User Manual
3.12.1 TRANSCEIVER FUNCTION
In both the set standby and set active commands the “a” field represents the transceiver function:
N = Normal
M = Monitor
0 = Unchanged
Transceiver receives and transmits on the active.
Transceiver receives on both active and standby, and transmits on active.
Transceiver function setting not changed
Hence it is possible for the external equipment (if it supports these commands fully) to change the active
and standby frequencies, and switch the M760Q in and out of monitor mode.
3.12.2 TRANSCEIVER STATUS
The Comm Transceiver Status command contains the “a” field for the transceiver’s status:
R = Normal receive
M = Monitor service
T = Transmit enabled
S = Stuck mic
F = Comm failure
Normal receiver mode – monitor function inactive
Monitor function active
PTT button is down - transmitting
Transceiver transmitting for longer than 45 seconds
Transceiver inoperative
IMPORTANT NOTE
After 45 seconds of transmission, the M760Q will flash the red LED
TX annunciator. During this period the transceiver status will default
to S (stuck mic).
M760Q Install & User Manual 01R16
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Microair Avionics
M760 Transceiver
Installation & User Manual
3.13 NOISE SUPPRESSION
After installation there may be unwanted noise present in the radio’s audio system. There a variety of
sources for this noise, but they usually fall into one of two categories:
•
•
Electro-Magnetic Induction (EMI)
Radio Frequency Induction (RFI)
3.13.1 POWER FILTER
EMI typically affects radio equipment by inducing noise on to the
power supply. Microair recommends the installation of a power
filter on the power wire to the M760. A simple line filter is
sufficient to ensure that the voltage is smooth, and causes no
interference to the radio. If engine noise can be heard, and it rises
and falls with the RPM, install a power filter.
Refer to the Microair Avionics website www.microair.com.au for
more information on aircraft electrical systems.
3.13.2 FERRITE CHOKES
RFI typically affect radio equipment by radiating RF noise into
the wiring. The most vulnerable are the microphone, headphone,
speaker, and power lines. The instance of RFI can be reduced by
installing ferrite chokes on the wiring harness.
Locations for best effect are on the wiring harness immediately
behind the DB15 connector at the radio, and on the
microphone/headphone lines just behind the headset jacks.
3.13.3 SUPPRESSION CAPACITOR
Another form of RFI is the impulse noise from equipment like
strobe lighting. This equipment can create large impulses on the
power supply which have RF components.
These signals can radiate to adjacent wiring to create noise. The
best defence here is a filter capacitor on the power input to this
type of equipment. A 0.01uF ceramic capacitor with a 3KV
voltage rating is most suitable for this task.
Refer to the Microair Avionics website www.microair.com.au for more information on aircraft electrical
systems.
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4.0
M760 Transceiver
Installation & User Manual
OPERATIONAL CONTROLS
Front Face
ITEM
Control Column
CONTROL
DESCRIPTION
1
Priority Switch
Momentary push down switch
2
Volume / On / Squelch
Click On - Rotate knob for volume
Rotate ring for squelch
3
Receiver / Transmit Annunciator
Red / Green LED
4
Mode Switch
Momentary push down switch
5
Frequency Adjust Knob
Rotate to adjust value
Press to move cursor
6
Toggle Switch
Momentary push down switch
7
Remote Memory Button
Momentary push - toggle active/standby freq’s
Push & Hold for 5 seconds - activate monitor
8
Push to talk (PTT) Button
Momentary push - transmit function
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Microair Avionics
4.1
M760 Transceiver
Installation & User Manual
PRIORITY SWITCH
The priority switch is a push down switch. When pushed down briefly, the radio will go into channel
mode, and select the frequency stored in memory 99. Memory 99 should be considered the priority
channel, which the user can quickly select when required. Memory 99 must be programmed for the
priority switch to operate. Memory 99 is set at the factory as the international distress frequency
121.500MHz. Memory 99 can be programmed the same way as any of the other channels; hence the
factory default can be edited. Refer to section 6.5 to edit this memory.
The priority channel (memory 99) can be edited but not be deleted.
4.2
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.
Rotate 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:
4.3
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, 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 45 seconds (warning)
The flashing red signal is designed to draw the pilot’s attention to the fact that the aircraft may have a
stuck PTT button!
Transmissions in excess of 30 seconds should be avoided.
While the M760 is in the program mode menu or memory programming mode the M760 is in its setup
state. The radio can not transmit or receive while it is in the setup state.
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Microair Avionics
4.4
M760 Transceiver
Installation & User Manual
MODE SWITCH
The mode switch is a push down switch, which will cycle through the operational modes of the M760.
When pushed down briefly the radio will step to the next operating mode.
ACTIVE / STANDBY MODE (Refer section 5.1)
Press
Mode
Switch
CHANNEL MODE
(Refer section 5.3)
VOX ADJUST
(Refer section 5.4)
Press Mode Switch
Press Mode Switch
If the internal VOX intercom has been disabled in the program mode menu the intercom adjust mode
will be skipped. See section 6.2 to enable / disable the internal VOX intercom.
By holding the mode switch down and turning on, the M760 will start in PROGRAM MENU (refer
section 6.0)
4.5
TOGGLE SWITCH
When the toggle switch is pressed briefly in Active/Standby mode, the active and standby frequencies
exchange places. Hold the toggle switch down for 3 seconds to activate the monitor function.
•
•
When the M760 is in monitor mode, press the toggle switch briefly to disengage the monitor
function.
When the M760 is in channel mode the toggle switch is used to quick save the frequency.
The toggle switch is also used in the PROGRAM MODE for programming functions.
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4.6
M760 Transceiver
Installation & User Manual
FREQUENCY ADJUST KNOB
The frequency adjust knob is used to change display values and characters.
Rotate the knob to scroll values or characters up or down. Press the frequency
adjust knob inwards briefly to move the cursor to the next display item to
adjust.
In the active/standby mode, only the standby frequency can be changed
directly, the active frequency cannot be directly altered by the frequency
adjust knob.
Cursor
MHz
KHz
In channel mode the user can scroll alphabetically by turning the frequency
adjust knob. The user can scroll alphabetically through stored memory
channels, by airport ID (YBUD) and radio service type (CTF).
Refer to section 6.4 for the input and section 6.5 for the amendment of a
memory channel.
Channel Frequency
Channel Name
In VOX mode the threshold level can be adjusted up or down by turning the
frequency adjust knob.
Adjustment is restricted to values between 1 (mic on continuously) and 42
(very insensitive – shout).
Threshold Level
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Microair Avionics
4.7
M760 Transceiver
Installation & User Manual
REMOTE MEMORY BUTTON
If fitted at installation, the remote memory button will have the same functionality as the toggle switch on
the display. It 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.
If the remote memory button is held down for 3 seconds while in the active / standby mode, the monitor
function is activated. Refer to section 5.2 for complete details on monitor function.
In channel mode, press the remote memory button briefly to cycle through the stored memory channels.
When the M760 is in VOX adjust mode, press the remote memory
button briefly to increase the VOX threshold.
Remote Memory Button
IMPORTANT NOTE
The remote memory button is highly recommended. It allows the user to keep
hands on the controls during flight, while changing channels or mode.
4.8
PUSH TO TALK BUTTON
The push to talk (PTT) button causes the M760 to transmit on
the active frequency or selected memory channel. During
transmission the LED annunciator will light red and the user
will hear themselves speaking through their own headphones
via the sidetone system.
The M760 will not transmit if the active frequency or selected
memory channel is below 118MHz.
The M760 will not transmit if the CD lockout function is
enabled and the M760 is currently receiving a signal. See
section 6.1 to enable / disable the CD lockout function.
PTT Button
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Microair Avionics
5.0
M760 Transceiver
Installation & User Manual
OPERATIONAL MODES
The M760 transceiver can operate in several operation modes. The user can step through these modes by
pressing the mode switch briefly. Operational modes are:
5.1
Active/Standby Mode
Channel Mode
VOX Adjust Mode
ACTIVE/STANDBY MODE
The display shows the active or in use frequency on the top line. The standby frequency is displayed on
the bottom line. Only signals on the active frequency are received. Transmissions can be made on the
active frequency by pressing the PTT button.
The active and standby frequencies are swapped by
pressing the remote memory button or the toggle switch.
The standby frequency can be changed by scrolling the
frequency adjust knob. The cursor can be moved between
MHZ and KHZ positions by pressing the frequency adjust
knob. Press the mode switch to toggle the display from
Active/Standby mode to Memory mode.
5.1.1
108 TO 118 MHZ TUNING
The pilot can select channels in the navigation (NAV) band from 108.000MHz to 117.975 MHz. The
M760 will receive only on these channels – the PTT button is disabled.
Many civil aviation authorities are now allocating voice services such as ATIS in the NAV band.
IMPORTANT NOTE
When the active frequency is set below 118.000MHz, the
transmitter is disabled.
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Microair Avionics
5.2
M760 Transceiver
Installation & User Manual
MONITOR FUNCTION
By holding down the remote memory button or toggle switch for
3 seconds and then releasing, the M760 will enable the monitor
function.
Both active and standby frequencies are monitored at the same
time for a signal.
An ‘M’ character will oscillate up and down to indicate that the
monitor function is active.
A signal can be received on either the active or the standby
frequency. An “R” character will appear beside the channel
receiving the signal.
While receiving a signal on the active frequency - the standby channel is NOT monitored.
While receiving a signal on the standby frequency - the active channel is periodically monitored. If a
signal is found on the active frequency the M760 will revert to the active frequency.
After a signal has been received the M760 will return to monitoring both frequencies.
IMPORTANT NOTE
The user can only transmit on the active frequency. If the PTT is pressed
the radio will transmit on the active frequency only.
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M760 Transceiver
Installation & User Manual
Monitor mode can be cancelled by pressing the remote memory button or toggle switch briefly. The ‘M’
character is no longer displayed at the right hand side of the display.
If the mode switch is pressed to move from active/standby mode to channel mode, the monitor function
is disengaged.
Monitor Mode
Monitoring on ACTIVE frequency
Monitor Mode
Monitoring on STANDBY frequency
Monitor Mode
Receiving on ACTIVE frequency
Monitor Mode
Receiving on STANDBY frequency
Monitor Mode
Transmitting on ACTIVE frequency
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Microair Avionics
5.3
M760 Transceiver
Installation & User Manual
CHANNEL MODE
The M760 has a memory database which can store up
to 99 channels.
Each channel can be programmed with any available
frequency from 108.000MHz to 136.975MHz, and is
named with a 4 character location and 3 character
service description.
Refer to the PROGRAM MODE Menu (sections 6.4
& 6.5) for the programming of memories.
Channel Frequency
Location
Service
When operating in channel mode, the programmed channels can be scrolled through alphabetically, by
rotating the frequency adjust knob, or by pressing the remote memory button. Only programmed
memories are displayed.
When changing operational modes the Active Frequency is carried forward to the next mode to avoid
an accidental change in channel.
When the operational mode is changed to channel mode, the
M760 will check all memory channels for the current active
frequency. If it finds the current active frequency it will display
the memory channel that corresponds to the current active
frequency. If the current active frequency is not found in any
memory channel a ‘?’ will be displayed on the bottom line.
The user can use the frequency adjust knob to scroll alphabetically through the memory channels
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Microair Avionics
5.4
M760 Transceiver
Installation & User Manual
VOX MODE
The M760 has a digitally controlled VOX intercom. VOX
stands for “voiced activated”, which means the intercom
function will trigger automatically when the user starts
speaking into the microphone.
It is important to set the threshold level to trigger on the
microphone.
If the VOX level is too low the microphones will always
be on, and the user will hear the cabin noise continuously
(hot mic).
If the VOX level is too high, the user will not be able to
easily trigger the microphones (shout to activate).
Press the mode switch until the VOX adjust screen is
displayed, and set the VOX threshold to the desired level.
It may be necessary to readjust this level when the aircraft
is operating at full power.
When the VOX is adjusted to 1 the microphones will be
on all of the time (hot mic). When the VOX is adjusted to
30+ the microphones will require a very loud voice to
activate (shout).
When in VOX mode the active frequency is displayed on the top line.
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Microair Avionics
6.0
M760 Transceiver
Installation & User Manual
PROGRAM MENU
The M760 can be started in program mode by holding the mode switch down and turning on. The mode
switch must be held down while the display goes through the start-up sequence, and ends with
PROGRAM MENU on the display.
Rotate the frequency adjust knob to scroll through the Program Mode Menu items. Use the remote
memory button or the toggle switch to select the menu item.
PROGRAM
MENU
CD
VOX
MONITOR
NEW MEM
EDIT MEM
EXIT
6.1
CD LOCKOUT
When CD Lockout is set ON the M760 will not
permit the PTT button to operate if a radio signal is
currently being received.
If the user attempts to transmit by pressing the PTT
button, the M760 will not transmit.
The signal being received will be heard in the
headphones or speaker.
When CD Lockout is set OFF the M760 will permit
the PTT to operate if a radio signal is currently being
received.
Background:
In high traffic areas such as circuit patterns, there is often a high level of radio traffic. There is also a high
instance of two aircraft trying to transmit at the same time. When this occurs the two transmissions interfere
with each other, and neither call can be properly received.
The CD Lockout is toggled by pressing the Toggle Switch. The factory default is to have the CD
lockout OFF.
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Microair Avionics
6.2
M760 Transceiver
Installation & User Manual
VOX
When VOX intercom is set ON the M760 user is able to
set the threshold of the internal VOX intercom via the
intercom adjust screen (See section 5.4).
When VOX setup is set OFF the M760 will set the
internal VOX intercom to its maximum threshold and
disable the Intercom Adjust screen.
Press the toggle switch to turn the VOX function ON/OFF.
IMPORTANT NOTE
For installation where an external intercom is to be used, the M760’s
internal VOX intercom MUST be turned OFF.
6.3
MONITOR SETUP
MONITOR setup allows the user to adjust the sample interval of the monitor function, which allows
the user to detect radio traffic on both the active and standby frequencies. When receiving a signal on
the standby channel, the M760 will sample the active channel regularly for signal. The MON value
represents the rate of the sample.
Background:
The M760 can monitor the active and standby frequencies, but
priority is given to the active. When a signal is received on the
standby frequency the active frequency is sampled to see is
there is a signal present.
The M760 will quickly change channels to check the active for
signal even if the standby is receiving a signal. The user will
perceive this sample action as a small click in the received
audio on the standby channel.
If no signal is found the receiver returns to the standby
frequency. When a signal is detected on the active frequency,
the M760 will lock to the active even if there is a signal
present on the standby frequency.
The MONITOR setup can adjust the sample rate by
pressing the Toggle Switch to increase the sample rate
value. The adjustment is restricted to values between 1 and
9. From 9, the value will revert back to 1. The factory
default is an interval of 5.
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Microair Avionics
6.4
M760 Transceiver
Installation & User Manual
NEW MEMORY CHANNEL
This option allows the user to program a new channel into
one of 99 memories. The next available memory will
automatically be selected.
To load a new channel the user must enter the frequency,
location, and service type. The location is typically the airport
ID, but the user may enter any 4 character description. The
service type can be selected from a list, or the user can enter
any 3 character description.
Press the toggle switch briefly to enter the NEW MEM
function.
6.4.1
SET FREQUENCY
Using the frequency adjust knob, set the frequency for the selected memory channel. The cursor can be
cycled through the MHz and KHz by pressing the frequency adjust knob. Once the frequency is set,
press the remote memory button or the toggle switch briefly.
Cycle cursor between MHz, and KHz, by pressing
the frequency adjust knob inwards briefly. Rotate
the frequency adjust knob to change value.
6.4.2
SET LOCATION
Using the frequency adjust knob, set the name for the selected memory channel. The cursor can be
cycled through the character positions by pressing the frequency adjust knob. Once the name is set,
press the remote memory button or the toggle switch briefly.
Cycle cursor between character positions, by
pressing the frequency adjust knob inwards briefly.
Rotate the frequency adjust knob to change the
character.
6.4.3
SET SERVICE
Using the frequency adjust knob, select the service type for the frequency / location from the following
list options:
The blank option allows the user to enter a three
character service description. Scroll top the blank
option and press the frequency adjust knob briefly
to access the editing cursor.
APP
ARR
ATF
ATS
(ATIS)
AWS
CLR
CTF
DEP
FIA
FSS
GND
MF
PAL
TWR
UNI
blank
Approach
Arrival
Air Traffic Frequency
Automatic Terminal
Information
Service
Automatic Weather Observing Service (AWOS)
Clearance / Delivery
Common Traffic Advisory Frequency (CTAF)
Departure
Flight Information Area
Flight Service Station
Ground
Mandatory Frequency
Pilot Activated Lighting
Tower Frequency
Unicom
User defined service (3 characters)
Once the service type is selected or entered, press the toggle switch briefly. The word SAVED is
displayed, and then the display returns to the Program Menu.
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Microair Avionics
6.5
M760 Transceiver
Installation & User Manual
EDIT MEMORY CHANNEL
The EDIT MEM function allows the user to program a channel
in memory. The frequency and airport code stored in each
memory channel can be set, changed, or cleared in this mode.
Using the frequency adjust knob, scroll through the existing
memories by location in alphabetical order. When the desired
memory is displayed, press the toggle switch to edit the details.
Editing is done in the same order as a new memory (refer 6.4).
After editing the M760Q will perform a memory sort to ensure
that channels are viewed in alphabetical order. The time taken to
do this depends on the number of channels stored in memory (2
minutes for 99 channels).
6.6
DELETE MEMORY CHANNEL
From the edit memory channel item, to delete the displayed memory, press the priority key. The word
DELETED is displayed briefly, before the display returns to the program menu.
6.7
EXIT MENU
This option exits the program menu and causes the radio to
sort the memory channels before returning to last operational
Mode.
Press the toggle switch briefly to exit from the program menu.
If a new memory has been added while operating in the
program menu, the M760Q will perform a memory sort to
ensure the channels are displayed in alphabetical order. The
time taken to do this depends on the number of channels stored
in memory (2 minutes for 99 channels).
IMPORTANT NOTE
Do not turn the M760Q off during the memory channel sorting process.
The channel will not appear in the correct alphabetical order if the process
is interrupted.
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Microair Avionics
7.0
M760 Transceiver
Installation & User Manual
FAQ’S
I hear a loud squeal in my headphones when I press the PTT button. What is happening?
If the squeal is heard only when transmitting, the likely cause is RF signal
getting back into the power or audio wiring. Refer to section 3.13 for tips on
reducing RF noise
I have two different types of headset in my aircraft. When I transmit with my headset, everyone can hear
me OK, but when the co-pilot headset is used, it is hard to hear. What can I do ?
The two headsets may have microphone of different performance. The quiet headset may require more
amplification to be heard properly. The M760Q is fitted with MIC GAIN controls for each headset. It is possible
to adjust upwards the MIC GAIN for the quiet headset to improve its performance, without affecting the good
headset. Refer to section 3.8 for adjustment details.
I am using the M760Q as COM1 and a Microair converted UHF CB radio as COM2. When I switch to
the UHF there is no intercom or sidetone. What is wrong ?
There is nothing wrong. The UHF CB radio is a conversion of a vehicle based product,
where the radio is configured to operate with a hand microphone and a speaker.
The radio has no intercom or sidetone facility in-built for this reason.
I use the dual monitor function. When my friend calls me on my “chat” channel, I discover I am
transmitting back to him on other channel. What’s going on ?
The dual monitor function allows the pilot to receive signals on either the active or standby channels. The
transmitter however is always set to the active channel regardless of which channel the last call came in on.
Another point about the dual monitor to note is the priority given to signals on the active channel. The monitor
function will continue to check for signals on the active channel even when receiving a signal on the standby
channel. If a signal is detected on the active channel, the M760Q will drop the signal on the standby channel as
switch over to the active.
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Microair Avionics
8.0
M760 Transceiver
Installation & User Manual
WIRING DIAGRAM
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Microair Avionics
9.0
M760 Transceiver
Installation & User Manual
MICROAIR HARNESS OPTIONS
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Microair Avionics
M760Q Install & User Manual 01R16
M760 Transceiver
Page 36 of 40
Installation & User Manual
20th December 2012
Microair Avionic
10.0
M760 Transceiver
Installation & User Manual
SPECIFICATIONS M760Q
Radio Type
Amplitude Modulation (AM) Aircraft Transceiver
Channels (Transmit)
760 channels, 25KHz spacing
Channels (Receive)
1160 channels, 25KHz spacing
Frequency Selection
VFO dial
Frequency Display
2 line alpha/numeric LCD display (with backlighting)
Frequency control
PLL frequency synthesis, which is microprocessor controlled
Memory is store in non-volatile EPROM
Memories
99 programmable memories
Dual Monitor
100ms Scan Time
Power consumption
Receive (no signal) 140 mA (no backlighting)
Transmit
1.9 A
Input Voltage
10.7 – 16.0 Volts Warning damage will occur above 16 Volts
Power output
5 watts (nominal)
VSWR Tolerance
< 2:1 for best operation (5:1 without damage)
Receiver sensitivity
-12dB SINAD @ 0.3uV (1KHz audio with 70% modulation)
Receiver Selectivity
-70dB
Squelch Range
0.5 - 10.0uV
Data Interface
RS232
Speaker volume output
Nominal 4 watts output to 4 ohms
Headset volume output
100mW into 150 Ohms
60mW into 300 Ohms
30mW into 600 Ohms
Auxiliary Audio
Line level audio
Temperature range
-20 to +55 degrees Celsius
Stability
< +/- 3.00ppm
Dimensions
W-65mm H-59mm D-135mm (plus 35mm for harness)
W-2.6”
H-2.3”
D-5.3”
(plus 1.5” for harness)
Exposed dial face
57mm diameter
2 ¼” diameter
Weight
416 grams
14.7 ounces
M760Q Install & User Manual 01R16
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118.000 – 136.975MHz
108.000 – 136.975MHz
(maximum audio output)
20th December 2012
Microair Avionic
11.0
M760 Transceiver
Installation & User Manual
DRILLING DIMENSIONS
Drilling Template
(not to scale)
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20th December 2012
Microair Avionic
12.0
M760 Transceiver
Installation & User Manual
LIMITED WARRANTY
The warranty period for any Microair Avionics manufactured article
is dependant on Condition of the article at time of sale and the
Purchase Date.
For New Articles the warranty period commences from Date of
Purchase and is valid for two years or the minimum period defined
by applicable consumer law, whichever is the longer. In the absence
of original Proof of Purchase the warranty will be valid for two
years from Date of Factory Shipment as determined by Microair
Avionics.
For Factory Reconditioned Articles offered for sale, the warranty
period commences from Date of Purchase and is valid for twelve
months.
For Factory Exchanged Articles the warranty period commences from the Date of Purchase of the original
article and is valid for the remainder of the original warranty period.
For Repaired Articles the warranty period commences from the date of Factory Shipment and is valid for 6
months for the original defect only.
Microair Avionics will, at its sole discretion, repair or replace any components, which fail in normal use.
Such repairs or replacement will be made at no charge to the customer for parts or labour. The customer shall
be responsible for any transportation costs for return of this product to Microair Pty Ltd or an approved
Microair Service Centre.
This warranty does not cover failures due to abuse, misuse, accident, unauthorised alteration, or repairs
carried out by parties other than Microair Avionics or an approved Microair Avionics 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 Avionics sole discretion to decide if a defect is a result of material or workmanship
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.
Microair Avionics may at it discretion, refer product returns for repair or service, to a service facility closest
to you. Microair Avionics reserves the right to repair or replace the product or software or offer a full refund
of the purchase price at its sole discretion.
To obtain warranty service, please email or call the Microair Avionics Repair line in Australia.
Domestic or International Return instructions are available on our website. Please follow these instructions
carefully.
Phone: ++ 61 7 4155 3048
Fax: ++ 61 7 4155 3049
repair@microair.com.au
Email:
Website:
www.microair.com.au
M760Q Install & User Manual 01R16
Page 39 of 40
20th December 2012
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