Remote Control Basics
R&S
®
SMB100A
251
Operating Manual 1407.0806.32 ─ 21
The instrument response is
4000000000
, i.e. the frequency is returned in Hz.
While remote control is active, the "Remote" icon in the status bar indicates that the
instrument is in remote control mode. The operation via the front panel or via
mouse and keyboard are locked, allowing a remote control program to be per-
formed without interruption.
On the display, keys and entry fields are grayed out and cannot be activated or
modified, but you can still open dialogs, for example to verify settings.
5. To disable the access to the dialogs, use the command
SYST:KLOC ON
.
6. To prevent unintentional return to manual operation, use the command
&LLO
.
Chapter 6.1.3.4, "LAN Interface Messages"
The instrument switches to "Remote LLO" state. The LOCAL key is disabled.
7. To enable the LOCAL key, use the command
>R
.
8. To return to manual operation, see
Chapter 6.2.2, "Returning to Manual Opera-
Tip:
Switching from manual operation to remote control and vice versa does not
affect the other instrument settings.
6.2.3.3
Remote Control over LAN using Socket Communication
This chapter provides an example on how to establish a remote control connection
over telnet protocol and a simple sockets-based program example that can be further
developed.
Setting up a Telnet Connection
To control the software, only a telnet program is required. The telnet program is part of
every operating system.
1. To establish a Telnet connection with the R&S
SMB, start the telnet program.
2. Enter the access string to connect to the instrument and confirm with ENTER.
The access string is composed of the open command short form) and the socket
address. The socket address is a combination of the IP address or the host name
of the R&S
SMB and the number of the port configured for remote-control via tel-
net. The R&S
SMB uses the port number 5025 for remote connection via Telnet.
Example:
o 10.113.1.150 5025
Starting a Remote Control Session
