Lan Connector - R&S AFQ100A Operating Manual

R&S AFQ100A

LAN Connector

The unit is equipped with an LAN interface as standard. The LAN connector is at the rear of the
instrument. Provided the appropriate rights have been assigned by the network administrator, files can
be transmitted via the network, and network resources, e.g. a network folders, can be used. The
instrument can also be remote-controlled and manually operated in the network. It is connected by
means of a commercial RJ45 cable.
The network card functions with 100/1000 MHz Ethernet IEEE 802.3u. The TCP/IP network protocol
and the associated network services are preconfigured. TCP/IP ensures connection-oriented
communication, where the order of the exchanged messages is adhered to and interrupted links are
identified. With this protocol, messages cannot be lost.
Connection of the instrument is described in chapter 1, section
control via Ethernet is described in chapter 5, section
architecture of a LAN remote-control connection is described in detail in the following.
Remote control of an instrument via a network is based on standardized protocols which follow the OSI
reference model (see Fig. below).
Application
Presentation
Session
Transport
Network
Data Link
Physical
Fig. 8-2 Example for LAN remote control based on the OSI reference model
Based on TCP/UDP, messages between the controller and the instrument are exchanged via open
network computing (ONC) - remote procedure calls (RPC). With XDR, legal RPC messages are known
as VXI-11 standard. Based on this standard, messages are exchanged between the controller and the
instrument. The messages are identical with SCPI commands. They can be organized in four groups:
program messages (control command to the instrument), response messages (values returned by the
instrument), service request (spontaneous queries of the instrument) and low-level control messages
(interface messages).
1401.3084.32
SCPI SCPI [3]
XDR (VXI-11) RFC 1014 [1,2]
ONC-RPC RFC 1057
TCP / UDP RFC 793
IP RFC 791
Ethernet/802.3 8802-3
802.3/10BASE-T 8802-3
8.6
"Connection to the
"Remote Control via IEC/IEE
Hardware Interfaces
Network", remote
Bus". The
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