Related Manuals for MGL Avionics A16
Summary of Contents for MGL Avionics A16
- Page 1 MGL Avionics A16 Aviation Audio Panel and Razor Intercom control head User and Installation manual...
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Page 2: Table Of Contents
Table of Contents FCC Statement..........................4 General............................4 Document history........................4 Description..........................4 Audio grounds.........................6 Audio wiring from A16 to COM microphone input..............7 Audio signal flow during transmit....................9 Dual circuit intercom.......................9 PTT behavior...........................9 Marker beacon receiver......................10 Power supply........................10 Digital control interfaces.......................10 Audio input specifications.....................10 Audio output specifications....................11... - Page 3 ..............................36 Editing the phone list......................37 Cockpit voice recorder (CVR)....................38 Electrical state interfaces......................39 PTT inputs..........................39 Accept and Hangup inputs....................39 RS232 and CAN bus communication protocols................39 Certifications..........................40 Mechanical dimensions......................41 Materials ..........................41 Dealing with common audio signal issues................42 Images............................44 Self test facility..........................47 Razor Firmware updates......................49...
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Page 4: Fcc Statement
8 November 2019, first release. Description The A16 audio panel is a split module consisting out of the audio panel system body and optional external control. External control can take the form of one or more panel mount control heads and/or control by an EFIS system. - Page 5 It only records active audio, not any silence so silence periods do not use up recording time. Recording may be played back as a block via all headset outputs or it can be extracted in digital form via the RS232 port 1 using the supplied application from MGL Avionics.
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Page 6: Audio Grounds
This means audio inputs are not connected to the A16 power supply grounds but are instead connected to their own audio inputs. This allows the elimination of common mode noise as the A16 will only process differential signals. -
Page 7: Audio Wiring From A16 To Com Microphone Input
A16. There are various options as to what ground to use for the shields and it is not critical. Suitable grounds are any of the A16's Audio output ground pins or a ground at the source of the signal. - Page 8 COM input level to about 1/3. It is recommended to use the V16 VOX system at a fixed level of “1” (do not use the bypass setting). You will be using the VOX functions of the A16 – so leave the V16 at “1” which is just enough to switch the intercom in the V16 off when not it use.
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Page 9: Audio Signal Flow During Transmit
Intercom setup menu of the A16 under “Miscellaneous”. The “normal” option is: “COM sidetone from COM audio in”. With this option selected audio flow is: Microphone → A16 → COM radio → A16 → headset. The alternative is: “COM sidetone Intercom loop back”. -
Page 10: Marker Beacon Receiver
Power supply The A16 audio panel system is designed to be operated on a typical 12V DC aircraft power system. The DC supply must be free of undesired transients and reasonably stable within the acceptable supply voltage range of the A16. -
Page 11: Audio Output Specifications
All other inputs 20-8000Hz Power supply The A16 is designed to operate from a 12V to 24/28V DC avionics bus. It will operate down to 8VDC. Current draw is dependent on supply voltage and drops as voltage increases (constant power draw). -
Page 12: Environmental Qualification Matrix
Environmental qualification matrix The environmental qualification is based on the document DO-160G Temperature and Equipment Categories B2, C1 Altitude Low temperature 4.5.1 -50°C ground survival Low temperature 4.5.1 -30°C shorttime operating Low temperature 4.5.2 -20°C operating High temperature 4.5.4 +55°C operating High temperature 4.5.3... - Page 13 – no test required Waterproofness 10.0 Equipment identified as Category X – no test required Fluids Susceptibility 11.0 Equipment identified as Category X – no test required Sand and Dust 12.0 Equipment identified as Category X – no test required Fungus 13.0 Equipment identified as Category X...
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Page 14: A16 Connector Pinout, Power Side
Voltage rises from 0 to about 2.0V at any rate and then the rise time to about 3.6V is very slow (in the region of greater than about 0.5 seconds) the A16 will enter self protection mode which will only be released when voltage drops again below 2.0V. -
Page 15: A16 Connector Pinout, Audio Side
Power supply ground (connected internally to pin 22) +12V to +28V DC power supply input +12V to +28V DC power supply input (connected internally to pin 24) A16 Connector pinout, Audio side Microphone 1 input Microphone 2 input Microphone 3 input... -
Page 16: Typical Connection Diagrams
This is highly recommended as it prevents the creation of a ground loop (the ground connection between radio output and audio input ground on the A16 is a signal connection and not connected to ground on the A16 side so no ground loop can be formed here. - Page 17 Note that all shielded cable only connects the shield at one end. This way no signal travels on the shield itself. Note that the COM radio audio ground (pin 19 on the A16) is not an electrical ground. This is a signal input forming part of the noise canceling system. Do not use this connection as grounding point for a shield.
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Page 18: Noise Canceling Inputs - How They Work
Normally, an audio input “sees” the signal as the voltage difference between its input and the electrical ground of its own circuit. Should the audio source have a slightly different ground are there is noise that is different at the source ground compared to the A16 ground then this difference will add to the signal. - Page 19 Example connection of two NAV radios.
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Page 20: Control Heads And Options
Control heads and options The A16 module must be connected to at least one controller. A controller is typically a Razor head (more than one may be connected) or an EFIS system. Pinout for 3.18” Razor Intercom control head Supply +9 to +28VDC... -
Page 21: Razor A16 Head
RS232 TX Port 2 (connect to CAN H on A16) CAN H (connect to CAN L on A16) CAN L Ground (Internally connected to pin 2) 10 KeepAlive. Do not connect. 11 A1. Control input. Select desired function in Razor setup menu. -
Page 22: Using The A16 Intercom
Using the A16 intercom Regardless of using a Razor control head or an MGL EFIS supporting the A16 the control will be the same as described here: Marker beacon lights (for A16 devices fitted With a marker beacon receiver) Bluetooth... -
Page 23: Setting The Volume
Setting the volume Turn the rotary knob to adjust the headset volume. When you turn the knob just one click the volume display activates. The current volume setting for Pilot and PAX audio output circuits is shown. Both will be shown as “locked”... -
Page 24: Bluetooth Connectivity
Note: The order of paired devices shown depends on the “last use” rule. The last known device that the A16 was able to pair with will always pair as device 1 after a restart. You may adjust the audio input level for your bluetooth connection. It is recommended to keep... - Page 25 it similar to that shown in this image (fairly low level). Adjust the volume of your bluetooth device fairly high or at maximum. This helps to suppress undesired sound artifacts in the bluetooth system (i.e. audio levels much higher than the undesired artifacts). You can enable/disable bluetooth sound individually for Pilot or PAX (Note: Left and Right channels are switched as one).
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Page 26: Setting Up Microphone Inputs
Setting up microphone inputs Tap the MIC button to open the Microphone setup screen. Here you can select the headset grouping (assign which headsets connect to the Pilot audio output and which connect to the PAX audio output). Note: if you make use of the two independent PTT inputs (PTT1 = Pilot and PTT2 = PAX) this setting also dictates which headset voice will be sent to the selected COM radio during transmit. -
Page 27: Adjusting Vox
Tap on either the VOX or the Input sensitivity field to move the white rectangle over that field. The field with the white rectangle can be adjusted using your Rotary control. Adjusting VOX: This level sets the signal threshold above which the microphone channel opens. It should be set to a level which ensures that the microphone is closed in normal flight so no noise can enter the audio system. - Page 28 You can also use the rotary control. Turn the knob to select the desired entry and push it to select that entry.
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Page 29: Assigning Names To Inputs
Assigning names to inputs Inputs NAV1,NAV2,AUX1,AUX2,AUX3,AUX4 and MUSIC may be assigned custom names. These names are stored in the A16. If you change the names they will become available to other controllers that may be connected to your A16 intercom. - Page 30 Tap the Name field to activate an editor for the name. You may use up to six characters. Ensure the result fits the available space on the button. Press the rotary control to switch character selections on the button. DEL deletes the character at the cursor position.
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Page 31: The Intercom Miscellaneous Menu
The Intercom Miscellaneous menu Tap here to change the way You would like the TX side tone Routed for COM1 Tap here to change the way You would like the TX side tone Routed for COM2 Tap here to change the way the Wired stereo music input is used. -
Page 32: Signal Check
Signal Check A convenient display of all input and output audio channels signal level is available in the Menu. The output displays also shows the current states of PTT and other digital input and output levels. The audio input levels show all of the audio input channels. Signals are displayed even if the corresponding channel is disabled. -
Page 33: The Head Menu
Razor. Inputs... Your Razor has two available digital inputs. They are not used with current firmware revisions. About... This function shows you the Firmware version installed on the Razor as well as the A16... -
Page 34: A1/A2
Making a phone call You can make a phone call in several ways. 1) You can dial on your mobile device. Any sound will be routed to your A16 intercom via the bluetooth connection. 2) You can tap the phone button on your Razor A16 display. This will bring up the dialer on the Razor. - Page 35 If you originated the call – you can tap “hangup” to end the call. “Accept” in this case has no function. The corresponding wired input on your A16 labeled “Accept” performs the same function if a button has been wired here.
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Page 36: The Phone List
The phone list The phone list is accessed in one of two ways – via the dialer keypad to select an existing number in the list or via the Head menu to edit the list. Use the slider to the left to quickly scroll through the list – you can also drag it with your finger. It is advisable to place often used numbers and emergency numbers at the beginning of the list for quick access. -
Page 37: Editing The Phone List
Editing the phone list Using the “Edit Phonelist” in the menu, select the entry you would like to edit. You can edit the actual phone number and a text descriptor up to 15 characters. To change the edit mode between number and text – push the rotary control. This moves a white rectangle over the item to be edited. -
Page 38: Cockpit Voice Recorder (Cvr)
Cockpit voice recorder (CVR) The A16 contains an “always on” cockpit voice recorder. This recorder records all active audio on all microphone and COM radio inputs. It records the last 35 minutes of audio in an “endless tape” fashion. Silence is not recorded, only active audio such as incoming radio transmissions and microphone VOX “open”. -
Page 39: Electrical State Interfaces
RS232 and CAN bus communication protocols The protocols used to communicate with the A16 are available to third party developers that would like to integrate the A16 into their systems. Please contact MGL Avionics (info@MGLAvionics.co.za) to obtain the latest protocol documentation or visit the website www.MGLAvionics.co.za... -
Page 40: Certifications
Certifications The A16 contains a Bluetooth transceiver Class 2 at +2dbm maximum TX power. • BT SIG/QDID: 110148 • United States/FCC ID: A8TBM62S2 • Canada/ISED - IC: 12246A-BM62S2 - HVIN: BM62SPKS1MC2 • Europe/CE • Japan/MIC: 005-101204 • Korea/KCC: MSIP-CRM-mcp-BM62SPKS1MC2 • Taiwan/NCC No: CCAN16LP0270T5 •... -
Page 41: Mechanical Dimensions
Mechanical dimensions 88.000 4.000 7.000 149.402 161.402 Dimensions +/- 0.25mm tolerance 64.992 141.402 29.250 30.109 165.402 Materials Body: Aluminum extrusion Flanges: Stainless Steel, 1mm, Fasteners Stainless Steel. Labels: Vinyl... -
Page 42: Dealing With Common Audio Signal Issues
In our experience, by far, the best solutions involve a specially selected audio isolation transformer, selected for its core material and physical separation of its primary and secondary winding. MGL Avionics provides a pair of these transformers with each A16 and further transformers may be purchased if needed. - Page 43 The above image shows two ways of using the 5001 transformer. The top illustration can generally be used for any audio feed to and from the A16 intercom system if needed.The illustration below is an effective solution for headset microphone feeds which require DC...
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Page 44: Images
Images Rear connector and Bluetooth antenna... - Page 45 Rear label detail...
- Page 46 Top view...
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Page 47: Self Test Facility
Note: By plugging in the self test connectors a strong feedback loop is created between audio outputs and inputs. This results in oscillation. This is not a problem for the test however. Once you start the test, the A16 is reconfigured for the duration of the test to avoid the feedback loops. -
Page 49: Razor Firmware Updates
The Firmware for the A16 Intercom includes the matching Firmware for the A16 Razor. Once you have updated the Firmware of the A16 either via Bluetooth or via RS232 port 1 using the supplied application from MGL Avionics you can then update the Razor which can extract its new Firmware via the CAN bus connection from the A16 Intercom.
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