RT-2087/ZPX-A User and Installation Guide
UAV-1005667-001 Rev A
ECCN 7A994
Page 39 | 48
Appendix A Control Interface
ZPX-A is controlled and configured using the data interface specified below.
Characteristics
Specifications
Physical
RS-232
Data rate
57,600 bps (default)
Parity
None
Data bits
8
Stop bits
1
Protocol
UCP (RX/TX enabled by default)
UCP-HD (disabled by default)
Apollo (disabled by default)
UCP is enabled by default for use as the input protocol. Apollo input can
optionally be enabled simultaneous with UCP, and messages are
processed based on the received data format.
UCP is enabled for use as the output protocol. Additionally, Apollo output is
enabled automatically upon receipt of an Apollo input message.
The data rate and protocols can be configured by the UCP/UCP-HD
Transponder Configuration message. UCP or UCP-HD input is required to
be enabled to allow device configuration.
A.1
UCP
uAvionix Control Protocol (UCP) is documented in
uAvionix UCP
Transponder Interface Control Document
UAV-1002375-001 (Rev. T or
later). This document is available to authorized parties and may be
obtained by contacting uAvionix.
UCP can be used to configure, control, and monitor status of ZPX-A.
A.1.1
Control Message
The Control message must be supplied to ZPX-A as documented in the
UCP ICD. Minimally, Mode A (squawk) code, IDENT, emergency state, and
transponder mode are provided in this message.