Control Over Telnet Server - Keysight E4980A User Manual

Overview of Remote Control
LAN remote control system

Control over telnet server

In a control system that operates over the telnet server, communications are
performed through connection between the sockets provided by the processes
of the external controller and the E4980A/AL to establish a network path
between them.
A socket is an endpoint for network connection; port 5024 and port 5025 are
provided for the sockets for the E4980A/AL. Port 5024 is provided for
conversational control using telnet (user interface program for the TELNET
protocol) and port 5025 for control from a program.
Preparing the external controller
As in the case of the SICL-LAN server, you need to set the I/O interface of the
external controller in advance to establish communication to the E4980A/AL
using the TCP/IP protocol. For the procedure, refer to
controller" on page 226
Conversational control using telnet (using port 5024)
You can use telnet to perform conversational control by sending SCPI
commands to the E4980A/AL on a message-by-message basis. For telnet, the
socket of port 5024 is used for communications.
For port 5024, service requests are asynchronous. Also, use Ctrl+C to clear
the device.
In this example, to show you the control procedure using telnet, in a Windows
environment you control the E4980A/AL (IP address: 192.168.1.101) from the
external controller.
Step 1. Open the MS-DOS command prompt screen.
Step 2. At the MS-DOS prompt, type "telnet 192.168.1.101 5024" and press Enter.
Step 3. The telnet screen opens.
Step 4. Type a command and press Enter; it is sent to the E4980A/AL and executed. If
you enter a command that queries some data, the query response is
displayed below the line in which you entered the command.
Figure 8-4
using the :FREQ command to set measurement frequency to 10 kHZ, the
:FUNC:RANG:AUTO command to set the auto range setting to on, the
:FUNC:IMP command to set a measurement item to Cp-D, and the *TRG
command to trigger the instrument. The setting check is made with the query
after each setting.
230
of the "Control over SICL-LAN server"
shows the screen displaying the measured value with :FETC? after
"Preparing the external
Keysight E4980A/AL Precision LCR Meter
section.