ThinkRF WSA5000 Series, Руководство программиста, Страница: 29 / 101

VITA-49 Radio Transport Protocol
Receiver Context Packet Class Stream
The Receiver Context Packet Class Stream is used to convey informational messages
about changes in the configuration and status of the RF receiver in the WSA5000.
Digitizer Context Packet Class Stream
The Digitizer Context Class Stream is used to convey information messages about
changes in the configuration and status of the IF digitizer in the WSA5000.
Extension Context Packet Class Stream
The Extension Context Packet Class Stream is used to convey metadata for the IF Data
Packet Stream, which no provision has been made in the IF Context Packet Stream.
IF Data Packet Class Stream
The IF Data Packet Stream is used to convey complex IQ samples from the digitizer to
devices external to the WSA5000.
Table 8 summarizes numerically the list of Stream Identifiers used by ThinkRF for
different Packet Class Stream. Each ID will be mentioned in the subsequent
corresponding Packet Class sections.
Table 8: A List of Stream Identifiers As Used by ThinkRF for Different Packet Classes
Stream Identifier Packet Class
0x90000001 Receiver Context
0x90000002 Digitizer Context
0x90000003 IF Data – {I
14
Q
14
} Format
0x90000004 Extension Context
0x90000005 IF Data – {I
14
} Format
0x90000006 IF Data – {I
24
} Format
Packet Classes and Streams
This section describes in details the rules and structure of those Packet Classes and
Streams. By definition, a series of packets instantiated from the same Packet Class
form a Packet Stream.
Note: All data words in each VRT packets are in big-endian order, and sent MSB first.
Receiver Context Packet Class
This Packet Class is a type of IF Context Packet Class. The packet information conveys
changes in the configuration and status of the WSA5000's RF receiver.
ThinkRF WSA5000 Wireless Signal Analyzer Programmer's Guide 29