Programming instructions

Programming Examples
LAN Programming Examples
Chapter 2 89
Sockets LAN Programming Using PERL
This example uses PERL script to control the signal generator over the sockets LAN interface.
The signal generator power level is set to
−
5 dBm, queried for operation complete and then
queried for it’s identify string. This example was developed using PERL version 5.6.0 and
requires a PERL version with the IO::Socket library.
1. In the code below, enter your signal generator’s hostname in place of the xxxxx in the code
line: my $instrumentName= “xxxxx”; .
2. Save the code using the filename lanperl.
3. Run the program by typing perl lanperl at the UNIX term window prompt.
Setting the Power Level and Sending Queries Using PERL
The following program example is available on the PSG Family Documentation CD-ROM as
perl.txt.
#!/usr/bin/perl
# PROGRAM NAME: perl.txt
# Example of talking to the signal generator via SCPI-over-sockets
#
use IO::Socket;
# Change to your instrument’s name
my $instrumentName = "xxxxx";
# Get socket
$sock = new IO::Socket::INET ( PeerAddr => $instrumentName,
PeerPort => 7777,
Proto => ’tcp’,
);
die "Socket Could not be created, Reason: $!\n" unless $sock;
# Set freq
print "Setting frequency...\n";
print $sock "freq 1 GHz\n";
# Wait for completion
print "Waiting for source to settle...\n";
print $sock "*opc?\n";
my $response = <$sock>;
chomp $response; # Removes newline from response
if ($response ne "1")
{
die "Bad response to ’*OPC?’ from instrument!\n";
}
# Send identification query
print $sock "*IDN?\n";