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HP-IB Programming Basics
HP-IB Command Information
Order of Programming Commands
Use standard HP-IB protocol to program the system state using generally the same sequence as
you press receiver front panel hardkeys and softkeys . From the computer , the receiver system
is treated as a single instrument, just as the various instruments that make up the system are
controlled using the receiver front panel.
Syntax Requirements
Mnemonics may be written using all uppercase characters (as in ST AR; which is preferred), or
using initial uppercase followed by lowercase (as in Star; which is allowed).
Either uppercase or lowercase characters may be used. The receiver generally accepts syntax
with extraneous blanks; however note that spaces are not allowed within the mnemonic name:
F or example , entering the mnemonic name MARK 1 in a statement would cause a syntax error ,
but MARK1 would not.
Use the semicolon (;) to separate instructions . Use the comma (,) to separate each value in a
series .
If no units terminator follows the value for frequency and time units , the system defaults
to receiver Basic Units (Hz, seconds). Other quantities (power , length) do not use a units
terminator .
Mnemonics
The program code for each function is a four-to-eight character mnemonic version of its label.
Many mnemonics must be followed by a numeric value in the basic measurement units . F or
example , the STIMULUS 4
ST ART
5 key is programmed using STAR . Programming mnemonics
for all receiver front panel controls and menu softkeys are given in the HP 8530A K eyword
Dictionary.
Strings of commands are written in logical sequences , separated by the semicolon, such as
OUTPUT 716;"FACTPRES;STAR 2E9;STOP 18E9;PARA1;LINP;MARK1 9E9;"
This series of command mnemonics executes a F actory Preset, selects a 2 GHz to 18 GHz sweep ,
displays P arameter 1 using the polar format, and then positions measurement marker #1 to 9
GHz. The semicolon (;) is used to terminate each individual command. Notice that the values
are in units raised to a power of 10. MARK1 9E9 means to place marker #1 (MARK1 ) to 9 GHz (9 x
10
9
) The E represents \raised to the power of."
Numeric entries and units
Numeric entries with no units terminator are equivalent to pressing the 4
x1
5 key in the entry
area. Instead of using the \E" exponent system you can simply enter the actual units for
frequency , time , or voltage:
Example:
OUTPUT 716;"FACTPRES; STAR 2 GHz; STOP 18 GHz; PARA1; LINP; MARK1 9 GHz;"
Frequency Use GHz, MHz, and kHz. No terminator is required for Hz units .
Time Use fs , ps , ns , us , and ms . No terminator is required for seconds .
Angle Angles should be entered into your program in degrees units . No terminator is
required.
18-2 HP-IB Programming