Remote Access via an External Controller R&S SMC100A
1411.4077.62 1.20 E-1
Remote Access via an External Controller
The R&S SMC can be remote-accessed from an external PC via a network link. This allows convenient
operation of the signal generator from the desktop although the instrument is integrated in a rack
s
omewhere else.
Remote access in contrast to remote control does not use remote-control commands but the regular
user interface displayed using separate software which is installed on the external PC. The instrument
can thus be manually operated from the PC as on the unit itself.
Preconditions for remote access are a connection between signal generator and PC via a LAN network
and the installation of the VNC client software on the PC and on the R&S SMC.
The VNC client software for setting up the connection is included in the Linux/Unix operating system per
default.
For Windows operating system, the free-of-charge software Ultr@VNC is provided on the R&S SMC
CD-ROM. VNC client programms for other operating systems are available free-of-charge on the
internet.
After the connection is established, the signal generator screen with the block diagram is displayed on
the external PC and the R&S SMC can be manually remote-accessed from the external PC. The
individual functions are operated using the mouse and keyboard. Specific instrument functions can be
executed using specific key combinations on the keyboard or a front panel key emulation that can be
operated with the mouse (see chapter 3, section "Legend of Front-Panel Controls").
Installation of the software Ultr@VNC and establishing the connection between external PC and signal
generator for Windows operating system is described in the following. Remote access via an external
controller with Linux/Unix operating system is performed accordingly.
Configuration for Remote Access via Ultr@VNC
The instrument is operated with the aid of the program Ultr@VNC. It is available as a free-of-charge
download on the internet for operating system Window XP (http://www.uvnc.com/download/index.html)
and on the R&S SMC CD-ROM.
Remote access of the signal generator is possible under the following conditions:
- The external PC with Linux/Unix or Windows operating system (Windows 95 or higher) is equipped
with a LAN interface which is configured for the network.
- The signal generator and PC are linked via a LAN.
- A user-specific password for the VNC connection is defined on the R&S SMC. The default
password is "instrument", it can be changed in the Environment-Security section of the Setup
menu.
- The Ultr@VNC Viewer software is installed on the external PC (or any other VNC client)
R&S SMC IP address and the user-specific password for the VNC connection are entered in the
VNC Viewer panel.
NOTICE Risk of unauthorized access!
After enabling the VNC connection, any user on the network who knows the
password and IP address of the signal generator can access this R&S SMC. Even
after cutting it, the connection is still enabled and the R&S SMC can be accessed any
time. To disable the connection, the VNC program on the R&S SMC must be
uninstalled or the VNC server service disabled.
To enhance security, also communication on the network via Ultr@VNC program
should be disabled in the firewall.
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