HP 8530A, Руководство по эксплуатации и программированию, Страница: 333 / 439

HP-IB Programming Basics
Overview of Computer-Controlled Measurements
In a typical computer-controlled measurement, you:
Set up the system for a particular measurement.
P erform an appropriate measurement calibration for each parameter to be measured.
Save the calibration in a cal set memory .
Install the test device , measure its response . The receiver will apply calibration osets to the
data.
Output the data from the desired array to the computer .
The Stimulus settings and P arameter used during the calibration must match those used during
the calibrated measurement. Cal sets remember the stimulus settings that were in eect when
the calibration was made . When you recall a cal set, it automatically changes the stimulus
settings accordingly . The cal set does not remember any non-stimulus settings .
Setting up the System
Connect the External Computer
Connect the computer to the main HP-IB connector . Connect RF sources to the System
Interconnect. Y ou must not connect the same device to the HP-IB connection and System Bus
at the same time!
A ddress Settings
Instrument interconnections and the HP-IB System Bus address settings in the receiver system
are shown at the beginning of the HP 8530A Installation Guide.
The receiver's System Bus uses two-digit HP-IB addresses to control instruments and
peripherals connected to it. T o change these addresses , use the menu under the receiver's front
panel 4 LOCAL 5 key (the same menu is available under 4 SYSTEM 5
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
HP-IB ADDRESSES ).
Set Up the Measurement Using HP-IB Commands
Set up the measurement using HP-IB Commands , following the guidelines already covered on
previous pages . Here is an example setup command string:
OUTPUT 716;"FACTPRES;STAR 2E9;STOP 18E9;PARA1;LINM;MARK1 19E9;"
This command string:
P erforms a F actory Preset (which selects Frequency Domain and Step Sweep mode)
Sets start frequency to 2 GHz
Sets stop frequency to 18 GHz
Selects P arameter 1
Selects Linear Magnitude Display F ormat
Puts a marker at 19 GHz
Here is another example
OUTPUT 716;"FACTPRES;ANGL;STAR -180;STOP 180;FREM 10E9;INCA 0.5;
TWOP;PARA1;POLM;PARA2;LOGM;EXTTPOIN;"
18-4 HP-IB Programming