Rohde & Schwarz SMU200A - Page 79

Preparing for Use
R&S
®
SMU200A
59Operating Manual 1007.9845.32 ─ 15
Like GPIB, LXI determines and standardizes the way the instrument behaves in a LAN.
The LXI implementation by the R&S Signal Generators allows you to change certain LAN
settings, to reset the LAN connection as well as function for easy instrument identification.
LXI classes and LXI functionality
LXI-compliant instruments are divided into three classes, A, B and C, with the functionality
of the classes hierarchically based one upon the other:
●
Class C instruments are characterized by a common LAN implementation, including
an ICMP ping responder for diagnostics. The instruments can be configured via a
web browser; a LAN Configuration Initialize (LCI) mechanism resets the LAN con-
figuration. The LXI class C instruments shall also support automatic detection in a
LAN via the VXI-11 discovery protocol and programming by means of IVI drivers.
●
Class B adds IEEE 1588 Precision Time Protocol (PTP) and peer-to-peer commu-
nication to the base class. IEEE 1588 allows all instruments on the same network to
automatically synchronize to the most accurate clock available and then provide time
stamps or time-based synchronization signals to all instruments with exceptional
accuracy.
●
Class A instruments are additionally equipped with the eight-channel hardware trig-
ger bus (LVDS interface) defined in the LXI standard.
For information about the LXI standard refer to the LXI website at http://www.lxistan-
dard.org. See also "News from Rohde & Schwarz, article 2006/II - 190".
Instruments of classes A and B can generate and receive software triggers via LAN mes-
sages and communicate with each other without involving the controller.
The R&S SMU complies with LXI class C and provides an integrated "LXI Status" dialog
for LXI status indication and reset of the LAN configuration (LAN Configuration Initialize,
LCI). To accesss the LXI Status dialog, press the SETUP key and select "Remote > LXI
Status".
For further information, see section "LXI Status" in the Operating Manual.
LXI Configuration