MGL Avionics Vega ASV-1 Operating Manual
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MGL Avionics Vega ASV-1 Operating Manual

Altimeter, airspeed (asi) and vertical speed indicator (vsi)
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Introduction
The ASV-1 is a 2 1/4" (57mm) sunlight readable encoding altimeter, airspeed and wide range vertical speed indicator.
The altimeter contains an internal high accuracy 24 bit digital altitude sensor which calculates altitude from -1500 ft up to
a maximum of +35000 ft. The ASV-1 outputs various formatted RS232 serial data protocols compatible with serial input
transponders such as that from Garmin, Magellan, Northstar, Trimble, Microair etc. The altimeter can display altitude in
feet or meters and local pressure can be set in millibars or inches of mercury
The VSI indicator can be displayed in either feet/minute (ft/min) or meters/second (m/s). The VSI can be calibrated by the
user once the instrument has been installed in the aircraft.
Airspeed is based on the pressure generated by a pitot tube system and a static port is provided as well for use by high
speed aircraft. The ASV-1 can measure airspeed from 20mph to 250mph (Version 1), 20mph to 350mph (Version 2) and
20mph to 320mph for the ASV-1HS (High Speed version). All are well suited to slower aircraft due to very good sensitivity
and linearity at low air speeds. Airspeed can be indicated in statute miles per hour (mph), kilometers per hour (km/h) or
nautical miles per hour (kts). The ASV-1 also provides a programmable Vs and Vne airspeed alarm output. ASI sensitivity
can be calibrated by the user to cater for errors caused by pitot tube placement.
In addition, the ASV-1 provides an encoder test function, flight timer since takeoff and records the maximum airspeed
reached. The ASV-1 provides a parallel Gillham code interface when used in conjunction with the MGL Avionics CNV-ALT.
Please note that the ASV-1 Version 2 replaces both the ASV-1 Version 1 and the ASV-1HS (High speed) unit.
Vega ASV-1
Altimeter, Airspeed (ASI) and Vertical
Speed Indicator (VSI)
Operating Manual – English 1.13

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Summary of Contents for MGL Avionics Vega ASV-1

  • Page 1 In addition, the ASV-1 provides an encoder test function, flight timer since takeoff and records the maximum airspeed reached. The ASV-1 provides a parallel Gillham code interface when used in conjunction with the MGL Avionics CNV-ALT. Please note that the ASV-1 Version 2 replaces both the ASV-1 Version 1 and the ASV-1HS (High speed) unit.
  • Page 2 Vega ASV-1 Operating Manual Page 2 1 Features • Large 1.8” high resolution 160x128, sunlight readable, wide viewing angle, 1000 cd/m2 TFT LCD display • A choice of 3 different display screens with either an Altitude, VSI or Airspeed tape •...

  • Page 3: Main Display

    Vega ASV-1 Operating Manual Page 3 2 Layout 2 1/4” (57mm) enclosure. Can be front or rear mounted Sunlight readable color graphic display: Backlight can be adjusted in the menu system F2 / Down Button: Menu system: Softkey button F1 / Up Button:...
  • Page 4 Vega ASV-1 Operating Manual Page 4 3.2 Altitude "TAPE" Display Airspeed value Airspeed unit Altitude Tape Altitude Value Altitude unit Altitude Bug VSI unit VSI value Local pressure readout (Either in mB or in “HG) 3.3 Airspeed "TAPE" Display Altitude Value...

  • Page 5: Altitude Bug

    Vega ASV-1 Operating Manual Page 5 3.4 Start / Stop flight display Press the F1/Up button during the normal display mode to manually start/stop a flight. This key is only active if the ASV-1 is setup to select the manual flight option under the “TIMERS”...

  • Page 6: Exiting The Menu System

    Vega ASV-1 Operating Manual Page 6 4 Menu System Press the rotary control button during the normal display mode to enter the menu system. Use the rotary control to navi- gate through the menu system. 4.1 Exiting the menu system Press the F1/Up button to exit the menu system when the “EXIT”...

  • Page 7: Flight Timer

    Vega ASV-1 Operating Manual Page 7 4.2 Flight Timer View Flight Log: Use the rotary control to view the next flight log entry. Erase Flight Log: Use this function to erase the flight log stored in the ASV-1. Flight: Select whether you want the ASV-1 to automatically detect a flight or whether the pilot must press the F1/Up button to start/stop a flight.
  • Page 8 Vega ASV-1 Operating Manual Page 8 4.3 ALT Setup (Altitude Setup) Altitude Unit: Select if you want the altitude displayed in ft (feet) or m (meters). Pressure Unit: Select if you want the local pressure displayed in mb (millibars) or “Hg (inches of mercury).

  • Page 9: Cal Factor

    Select the protocol of the serial RS232 output message. The protocol can be selected between GARMIN AT, Magellan, Northstar / Garmin, Trimble / Garmin, MGL Avionics and Microair UAV. Please note that the baud rate is automatically ad- justed according to which protocol is selected. The output format is as follows. The message contains the current pres- sure altitude with a fixed reference to 1013.25mB (29.92 inches mercury).
  • Page 10 Vega ASV-1 Operating Manual Page 10 sure), L, local pressure setting in millibars, +/-, four digit VSI reading right justified zero padded in ft/min, X, checksum, carriage re- turn The checksum is a simple modulo 256 sum of the binary values of the individual char- acters.
  • Page 11 Vega ASV-1 Operating Manual Page 11 Test Alt Encoder: This is a handy function to test the ASV-1 transponder interface once the installation has been completed. The serial out- put will output specific altitudes which can then can be used to test the serial RS232 output and the parallel gillham output if using a CNV-ALT converter.
  • Page 12 Vega ASV-1 Operating Manual Page 12 4.4 VSI Setup (Vertical Speed Indicator Setup) VSI Display: Select if you want the VSI to be displayed. VSI Unit: Select if you want the VSI to be displayed in "ft/min" (feet/minute) or "m/s" (meters/second).
  • Page 13 Vega ASV-1 Operating Manual Page 13 4.5 ASI Setup (Airspeed Setup) Zero ASI Sensor: This setup allows your instrument to measure the zero airspeed reading of the airspeed sensor and set a calibration value internally for this. This is equivalent to some mechanical airspeed indicators that have an adjustment to set the needle to zero when the aircraft is not moving.
  • Page 14 Vega ASV-1 Operating Manual Page 14 ASI Span: Select the maximum airspeed that you want the airspeed tape to display. This can give you increased display resolution. ASI In View: Adjust this setting to set the amount of tape to view. For example, setting this value to 30% and your "ASI SPAN" to 250 will result in the tape showing 75 on the display at a time.

  • Page 15: Security Setup

    Vega ASV-1 Operating Manual Page 15 4.6 MISC Setup (Miscellaneous Setup) Backlight: Select this menu option to adjust the backlight brightness. Security Setup: Select this menu option if you want to password protect the menu system. Information: This menu option displays information about the unit.

  • Page 16: Sensor Info

    Vega ASV-1 Operating Manual Page 16 Default Settings: Select this menu option to reset all the settings to factory defaults. 4.7 Sensor Info This menu displays information about the altitude and airspeed sensors. 5 Loading factory default settings Press and hold the F1/Up button and rotary control during power up to load the pre- programmed factory default settings.

  • Page 17: Error Messages

    Vega ASV-1 Operating Manual Page 17 6 Error Messages Unit settings CRC error. Load default settings to restore to factory defaults. If the error message still persists then it could possibly be a non-volatile memory failure in which case the instrument will then have to be returned to the factory.

  • Page 18: Specifications

    Vega ASV-1 Operating Manual Page 18 7 Specifications Operating Temperature Range -20ºC to 50ºC (-4ºF to 122ºF) Storage Temperature Range -30ºC to 80ºC (-22ºF to 176ºF) Power Supply 10 to 30Vdc Approx. 73mA @ 13.8V (backlight highest setting), 33mA @13.8V (back-...

  • Page 19: Installation

    Vega ASV-1 Operating Manual Page 19 10 Installation Connect a pitot tube to the “pressure port” and if required connect the static port. Connect the static port to a suitable static air pressure line. If you have a slow aircraft or an aircraft where the internal cabin pressure does not change during flight and is equivalent to the outside air pressure you may find that it is not re - quired to connect a static port.

  • Page 20: Cable Connections

    Vega ASV-1 Operating Manual Page 20 10.2 Pressure Port Dimensions Version 1 pressure ports (Plastic) Inches Millimeters 0.248 0.278 6.30 7.06 0.420 0.440 10.67 11.18 0.182 0.194 4.62 4.93 0.310 0.330 7.87 8.38 Version 2 pressure ports (Brass) Inches Millimeters 0.157...
  • Page 21 10.4 CNV-ALT (Serial altitude to parallel Gillham code converter) The CNV-ALT accepts RS232 serial data from a compatible MGL Avionics instrument and produces parallel Gillham codes in a format compatible with mode C transponders. The ASV-1 serial protocol must be set to MGL Avionics.
  • Page 22 Vega ASV-1 Operating Manual Page 22 11 Dimensions...

  • Page 23: Warranty

    IMPORTANT NOTICE: You must make your own determination if the products sold by MGL Avionics are safe and effective for your intended ap- plications. MGL Avionics makes no representations or warranties as to either the suitability of any of the products we sell as to your particular application or the compatibility of any of the products we sell with other products you may buy from us or anywhere else, and we disclaim any warranties or representations that may otherwise arise by law.
  • Page 24 Vega ASV-1 Operating Manual Page 24 Other instruments in the Stratomaster Vega series AHRS-1 Artificial Horizon and Magnetic Compass Indicator AHRS-3 Self contained Artificial Horizon and Magnetic Compass Indicator ALT-5 Altimeter and Vertical Speed Indicator (VSI) ASI-4 Airspeed Indicator (ASI)

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