SV-XPNDR-261 Transponder Installation and Configuration
SkyView HDX System Installation Manual - Revision E 12-9
12.2.2 Power / Ground Input
The power supply can be 11-33 Volts DC; no voltage adjustment is required. 20 AWG
wire is sufficient for wire runs up to 50’ for this application. Note that the SV-XPNDR-261
must be connected to aircraft power – none of SkyView’s voltage outputs can provide a
sufficient amount of power to power the SV-XPNDR-261.
It is always good practice to use more than one (1) ground path in an installation. With
only one (1) wire there may be only a single grounding path for the SV-XPNDR-261,
controller and antenna. This can allow static electricity to build up and damage your
SkyView display(s). Ensuring that the mounting tray is grounded provides an adequate
alternative ground path to protect against such events. This is particularly important when
the SV-XPNDR-261 is mounted on a non-conducting surface, such as a composite
structure, where the mounting tray is often not grounded. Therefore, make sure that the
mounting tray is grounded in addition to having the ground wire connected as depicted
above.
Note: The SV-XPNDR-261 power input is not protected against reversed
power connections. If the power and ground inputs to the SV-XPNDR-261
are reversed, and power is applied to the Ground input, and Ground is applied
to the Power input, the SV-XPNDR-261 will be destroyed and this repair will
not be covered under warranty. Check wiring before applying power!
12.2.3 Pin 1/2 and 12/13 Loopbacks
Pins 1 and 2 must be connected together (as shown in Figure 75, Figure 76, and Figure
77 above). Pins 12 and 13 must be connected together (as shown in Figure 75, Figure
76, and Figure 77 above).
12.2.4 Serial RX (Pin 5) and Serial TX (Pin 7)
All communication between the SV-XPNDR-261 module and SkyView is accomplished
via a single bidirectional serial connection. To accomplish this:
• Choose an unused serial port on each display to connect the SV-XPNDR-261.
Note that both the TX and RX sides of the serial port are needed, and both the
RX and TX lines must be connected to all displays in parallel. It is required that
the same numerical serial port on each display be used.
• Connect the SV-XPNDR-261 TX wire (pin 7) to the SkyView serial RX of your
choosing. If you have multiple displays, the SV-XPNDR-261’s TX wire must be
connected to a serial RX wire on each display.
Note that Pin 1 and Pin 2 must be connected to each other as depicted above
as part of the wiring harness (they are not connected together inside the SV-
XPNDR-261).
Note that Pin 12 and Pin 13 must be connected to each other as depicted
above as part of the wiring harness (they are not connected together inside
the SV-XPNDR-261).
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