Rohde & Schwarz RTP Series - Spacewire (Option R&S RTP-K65); Spacewire Basics

Protocol analysis
R&S
®
RTP
861User Manual 1337.9952.02 ─ 12
4. Tap "Source" and select the serial bus that is set to USBPD (e.g. "SerBus1", unless
already selected).
The search dialog for USBPD protocol analysis is opened.
5. Specify search criteria according to Chapter 13.20.5.1, "USBPD search setup",
on page 858.
6. To acquire a waveform, press [Single].
The R&S RTP performs a USBPD decode according to the thresholds and protocol
settings of the associated serial bus source (here in our example SB1).
7. To start searching the acquired waveform for specific events, tap "Enable" in the
search setup dialog:
The R&S RTP displays the "Search Results" box that lists the detected events.
For information on how to configure the search results presentation and how to navi-
gate the search results, see also "To display search zoom windows" on page 470.
13.21 SpaceWire (option R&S RTP-K65)
The SpaceWire is a communication network standard used for spacecrafts. It is based
on the IEEE 1355 standard of comunications and coordinated by the European Space
Agency (ESA).
● SpaceWire basics................................................................................................. 861
● SpaceWire configuration.......................................................................................862
● SpaceWire trigger................................................................................................. 866
● SpaceWire decode results.................................................................................... 869
● Search on decoded SpaceWire data.................................................................... 870
13.21.1 SpaceWire basics
The SpaceWire links are a Point-to-point (P2P) connection between a node and
another node or a rooter. The link is full-duplex bidirectional serial data link.
The SpaceWire has two types of characters:
●
Data characters containing a parity bit, a data control flag and eight bits of data.
Figure 13-34: SpaceWire data characters
SpaceWire (option R&S RTP-K65)