SkyView System Installation Guide - Dynon Avionics

SV-XPNDR-26X Installation, Configuration, and Testingconducting surface, such as a composite structure, where the mounting tray is often notgrounded. Therefore, make sure that the mounting tray is grounded in addition to having theground wire connected as depicted above.Note: The transponder power input is not protected against reversed powerconnections. Reversing the power and ground inputs to the transponder willdestroy it. Check wiring before applying power.Pin 1/2 and 12/13 LoopbacksPins 1/2, and pins 12/13 must be connected to each other as depicted in the figures above.Serial RX/TXAll communication between the SV-XPNDR-26X module and SkyView is accomplished via asingle bidirectional serial connection. To accomplish this:Choose an unused serial port on each display to connect the SV-XPNDR-26X to. Notethat both the TX and RX sides of the serial port are needed, and both the RX and TX linesmust be connected to all displays in parallel. It is required that the same numerical serialport on each display be used.Connect the SV-XPNDR-26X TX wire (pin 7) to the SkyView serial RX of your choosing. Ifyou have multiple displays, the transponder TX wire must be connected to a serial RXwire on each display.Connect the SV-XPNDR-26X RX wire (pin 5) to the SkyView serial TX of your choosing. Ifyou have multiple displays, the transponder RX wire must be connected to a serial TXwire on each display.Record the SkyView serial port that you have chosen on each display as you will need toconfigure it later for use with the transponder.Mutual Suppression (optional)Mutual Suppression allows two or more transmitters on adjacent frequencies to inhibit theother transmitters when one is active to limit the interference effects. It is commonly usedbetween transponders and DME systems, and between transponders and collision avoidancesystems. Most installations will not make use of this feature, since most Dynon-equippedaircraft have only one transponder and often do not have DME equipment or other activetraffic system that interrogate other aircraft.The Mutual Suppression pin (18) is an ARINC compatible suppression bus interface, which actsas both an input and an output. The SV-XPNDR-26X will assert this signal when it is transmitting,and can be suppressed by other equipment that asserts the signal. The SV-XPNDR-26X willdrive approximately 24 Volts on the output (independently of supply voltage), and will treat theinput as active whenever the bus has greater than 10 Volts.SkyView System Installation Guide - Revision O 11-9