R3131 Spectrum Analyzer Operation Manual
4.1 GPIB Remote Programming
4-14
Apr 10/98
4.1.9
GPIB Command Codes
The following tables list the GPIB commands by function.
Listener Code Column:
An asterisk (*) in the Listener Code Column indicates that the function
requires numeric data together with the function code.
The sign /***/ in the Listener Code Column indicates that the function requires
character string data together with the function code.
[ON], [ON,] and numeric data are omissible.
String data such as file name, label and so on can receive characters, which are
found after the command and prior to the delimiter, as input values. However,
when data begins with a “/”, the characters between “/” and “/” are received as
input.
Output Format Column:
A comma (,) in the Output Format column indicates that multiple items are
output.
ON/OFF or AUTO/MANUAL in the Output Format column indicates that the
code outputs 1 or 0, respectively.
All frequencies are in hertz (Hz), and all times are in seconds. Levels are
output in the currently displayed unit.
Table 4-1 Frequency
Function
Listener Code
Talker Request
Code
Output Format
Center frequency
CF*
CF?
Center frequency
CF Step size
CS*
CS?
CF Step frequency
CF Step AUTO
CA
CA?
0:Manual/ 1:Auto
Start frequency
FA*
FA?
Start frequency
Stop frequency
FB*
FB?
Stop frequency
Frequency span
SP*
SP?
Span frequency
Full span
FS
–––
–––
Zero span
ZS
–––
–––
Peak zoom
PKZOOM
–––
–––
Last span
LTSP
–––
–––
LSPAN
–––
–––
