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Network operation and remote control R&S ® LCX Series 151 User Manual 1 179.2260.02 ─ 08 Remote file access (FTP) ● A remote client device accesses the instrument's file system over an Ethernet con- nection, usi…

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Network operation and remote control
R&S
®
LCX Series
150User Manual 1179.2260.02 ─ 08
10.1 Overview of remote access modes
This section outlines the possible access modes and their major characteristics.
Remote control (SCPI)
●
A remote PC controls the instrument, usually using VISA (Virtual Instrument Soft-
ware Architecture) interfaces.
●
Remote control disables the manual operation of the instrument; you can set differ-
ent lock states.
●
The GUI is not visible on the controller PC.
●
Remote control commands (SCPI) perform the settings, either individually or in
sequences (SCPI programs).
●
Using SCPI programs is faster than the manual operation, since they automate
repeating applications.
Remote operation (VNC)
●
A remote device accesses the instrument using the common platform technology
VNC (Virtual Network Computing).
●
The protocol allows simultaneous operation from several remote devices and the
instrument nevertheless remains locally operable.
●
The GUI is visible.
●
To perform the settings, you can operate the instrument as with the manual control.
●
During remote operation over VNC, the direct control of the instrument is not dis-
abled.
You can control the instrument from the front panel and over the remote computer
alternately.
●
Clients supporting remote operation depend on the used remote device, see
Table 10-1.
●
How to: see Section 10.6.1.2, "Accessing the R&S LCX over VNC", on page 175.
Table 10-1: Supported VNC operation modes
Remote device VNC client Requirements Characteristics
Desktop
(Windows, Linux,
Mac
TM
OS)
●
Dedicated client software
Client Software must be installed. Fast, supports several options like
full-screen mode or auto-login.
●
Any web browser
Java Runtime must be installed
and activated in the browser set-
tings.
Fast and convenient - only the
instrument address required.
Java runtime is sometimes con-
sidered as security concern.
●
Web browser with HTML5
Web sockets must be supported. Slower than the other modes.
No additional installation or acti-
vation is required.
No security concern.
Overview of remote access modes
Network operation and remote control
R&S
®
LCX Series
151User Manual 1179.2260.02 ─ 08
Remote file access (FTP)
●
A remote client device accesses the instrument's file system over an Ethernet con-
nection, using FTP (file transfer protocol).
●
The protocol enables you to get direct access to the file directory of the R&S LCX
to transfer files from or to the instrument.
●
The access requires a dedicated FTP client on the host device. Usually, each oper-
ating system provides a basic build-in FTP client, but the functionality can vary and
be limited to upload and download operation. The accessible file types depend on
the contents of the instrument's file manager, see Section 9.1, "File and data man-
agement", on page 120.
●
For authentication, you require the instrument's user name and password.
How to: see Section 10.6.2, "Accessing the file system of the R&S LCX using FTP",
on page 177.
10.2 Remote control interfaces and protocols
The R&S LCX supports various interfaces for remote control. You need the connection
between both devices and an apllication on the controller PC that supports communi-
cation over the used interface. Table 10-2 gives an overview on the connectivity:
Table 10-2: Remote control interfaces and protocols
Interface
Protocols, VISA
*)
address string and library
Remarks
Local area network
(LAN)
●
Address string
TCPIP::host address[::
LAN device name][::INSTR]
VISA
●
VXI-11
TCPIP::host address[::inst0][::INSTR]
VISA
●
Socket communication (Raw Ethernet, simple
Telnet)
TCPIP::host address[::
LAN device name]::<port>::SOCKET
VISA or socket controller
The LAN connector is at the rear panel of the
instrument.
The interface is based on TCP/IP, see Sec-
tion 10.2.1, "LAN interface", on page 152 for
details on the address information.
USB
●
USBTMC
USB::<vendor ID>::<product ID>::
<serial number>[::INSTR]
VISA
●
CDC
(communications device class, corresponds to
VCP (virtual COM port))
The USB B connector is at therear panel of the
instrument.
For a description of the interface, see Sec-
tion 10.2.2, "USB interface", on page 154
Remote control interfaces and protocols
Network operation and remote control
R&S
®
LCX Series
152User Manual 1179.2260.02 ─ 08
Interface
Protocols, VISA
*)
address string and library
Remarks
GPIB (IEC/IEEE Bus
Interface)
(option R&S NG-B105
●
–
GPIB::<address>[::INSTR] (no secondary
address)
VISA (optional)
The optional GPIB bus interface according to
standard IEC 625.1/IEEE 488.1 is at the rear
panel of the instrument.
For a description of the interface, see Sec-
tion 10.2.3, "GPIB interface (IEC/IEEE bus
interface)", on page 155.
*
) VISA (Virtual Instrument Software Architecture) is a standardized software interface library providing input and output functions to
communicate with instruments. A VISA installation on the controller is a prerequisite for remote control over LAN and USB inter-
face. For remote control over socket communication VISA installation is optional. When using socket communication or the GPIB
interface, VISA installation is optional. For basic information, see Remote control via SCPI.
Rohde & Schwarz provides the standardized I/O software library R&S VISA for down-
load at the Rohde & Schwarz website http://www.rohde-schwarz.com/rsvisa.
How to: see Section 10.4, "Connecting the R&S LCX for remote access", on page 167
and Section 10.5, "Adjusting interface addresses", on page 169
● LAN interface........................................................................................................ 152
● USB interface........................................................................................................154
● GPIB interface (IEC/IEEE bus interface)...............................................................155
● Status reporting system........................................................................................ 156
10.2.1 LAN interface
To be integrated in a LAN, the instrument is equipped with a LAN interface, consisting
of a connector, a network interface card and protocols.
The network card can be operated with the following interfaces:
●
10 Mbit/s Ethernet IEEE 802.3
●
100 Mbit/s Ethernet IEEE 802.3u
For remote control, the PC and the instrument must be connected over the LAN inter-
faces to a common network with TCP/IP network protocol. The instruments are con-
nected with a commercial RJ45 cable (shielded or unshielded twisted-pair category 5).
The TCP/IP network protocol and the associated network services are preconfigured
on the instrument. Software for instrument control and (for specified protocols only) the
VISA program library must be installed on the controller.
Identifying instruments in a network
If several instruments are connected to the network, each instrument has its own IP
address and associated resource string. The controller identifies these instruments by
the resource string.
10.2.1.1 VISA resource strings
The VISA resource string is required to establish a communication session between
the controller and the instrument in the LAN. The resource string is a unique identifier,
Remote control interfaces and protocols