Appendix C: Wiring and Electrical Connections
17-18 SkyView System Installation Guide - Revision K
The SV-XPNDR-26X is designed to provide all of the required parameters listed in AMC20-24.
However, in order to be used for separation services AMC20-24 sets additional criteria related
to the position accuracy and integrity of the GPS position source used, and the ability for the
GPS to communicate those accuracy and integrity parameters to the ADS-B output system in
the transponder. At the publication date of this manual, the only commercially available GPS
receivers we are aware of that can be used with SV-XPNDR-26X to meet the system
requirements of AMC20-24 are the Freeflight 1201 and the NexNav 3101.
A wide range of other GPS receivers can be used as the position source for ADS-B, including
ETSO-129a receivers and simpler VFR GPS receivers. Whilst these receivers may be suitable for
Informational or Experimental installations, they generally lack one or more of the required
integrity parameters for an operational IFR separation application.
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