Model
8901B
Operation
3-6.
REMOTE OPERATION VIA THE HEWLETT PACKARD INTERFACE BUS (HP-IB)
Introduction to the Section
This section documents how the instrument interacts with a controller over HP-IB
in
remote operation.
This section
is
intended as a reference document for operators who are familiar with their controller
protocol and programming language, and
is
designed
to
be used
after
you have been introduced
to
basic
front-panel operation as shown in the
Local
section.
Accurate measurements are dependent on the proper functioning of both the HP-IB and the
Modulation Analyzer. The
Basic finctional Checks
of
the
Modulation
Analyzer
and the
Basic
finctional Checks
of
the Hewlett
-
Packard Interface Bus (HP-IB)
verify that the Modulation Analyzer
and HP-IB are operating properly and can respond
to
or
send bus messages.
How to Use this Section
to
Make a Measurement
Beginning Users:
You will need to read the information presented in the
Local
section and perform
the procedures described there to become familiar with the basic operation of the instrument. Then
read the portions of the
Detailed Operating Instructions
(in this manual) describing the measurement
you want to make. Then return to this section and read “Programming the Modulation Analyzer”,
paragraph
3-7.
This information should be enough to enable you
to
make most measurements.
Intermediate Users:
If
you are familiar enough with programming the instrument to feel you can skip
the above steps, you may be interested in more specific information. In this case read the paragraphs
titled, “Data Output”, “Hewlett Packard Interface Bus”, “Modulation Analyzer Remote Capabilities”,
and/or “Additional Information” as appropriate
to
your needs.
Advanced Users:
You may be able to program the instrument just using the tables in the back of
this section which list the codes required
to
make measurements, the modifiers for each measurement,
and other related information. Specific subjects such as Triggering, the Service Request Message and
the Status Byte may be of interest. Explanations can be found in paragraphs of the same name.
3-7.
PROGRAMMING THE MODULATION ANALYZER
Overview
All Modulation Analyzer functions are fully programmable, except the POWER switch.
The Modulation Analyzer can be externally triggered (Refer
to
“Triggering Measurements”, under
paragraph
3-10.)
Triggering can be used to allow the Modulation Analyzer
to
settle before making
a measurement. It can be used
to
control when the Modulation Analyzer takes a measurement and
outputs the result.
Valid Programming Codes
The HP 8901B will execute:
0
The function codes described in Table 3-11, “Modulation Analyzer Function to Code Summary”.
0
Valid special functions (refer
to
page 3-241 for a list of special functions). All special function
0
The HP-IB commands described in Table
3-7,
“Modulation Analyzer Remote Capabilities Table”.
As
a convenience, all lower case alpha characters are treated
as
upper case. Commas and spaces
between program codes are ignored by the instrument and therefore may be used to improve readability
in programming.
codes are formed by the special function number followed by the code
“SP”.
3-13
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