Agilent Technologies 8935 Series Bedienungsanleitung PDF herunterladen (Seite 32)

32 Chapter 1

O:\Manuals\E6380A_Progguid\Book\Usehpib.fm

Using HP-IB

Getting Started

General HP-IB Programming Guidelines

The following guidelines should be considered when developing

programs which control the Test Set through HP-IB:

• Guideline #1.

1. Bring the Test Set to its preset state using the front-panel

PRESET key. This initial step allows you to start developing

the measurement sequence with most fields in a known state.

2. Make the measurement manually using the front-panel

controls of the Test Set. Record, in sequential order, the

screens selected and the settings made within each screen. The

record of the screens selected and settings made in each screen

becomes the measurement procedure.

3. Record the measurement result(s).

4. Develop the program using the measurement procedure

generated in step 2. Be sure to start the programmatic

measurement sequence by bringing the Test Set to its preset

state using the *RST Common Command. As the

measurement procedure requires changing screens, use the

DISPlay command to select the desired screen followed by the

correct commands to set the desired field(s).

NOTE

When IBASIC programs are running the display is dedicated to the

IBASIC controller for program and graphics display. This means

instrument front panels are not displayed when an IBASIC program is

running. However, the DISPlay <screen> command causes all setting

and measurement fields in the <screen> to be accessible

programmatically. Attempting to read from a screen that has not been

made accessible by the DISPlay command will cause

HP-IB Error:

−

420 Query UNTERMINATED, or

HP-IB Error:

−

113 Undefined header

Make sure the desired measurement is in the ON state. This is

the preset state for most measurements. However, if a previous

program has set the state to OFF, the measurement will not be

available. Attempting to read from a measurement field that is

not in the ON state will cause HP-IB Error:

−

420 Query

UNTERMINATED.

5. If the trigger mode has been changed, trigger a reading.

NOTE

Triggering is set to FULL SETTling and REPetitive RETRiggering

after receipt of the *RST Common Command. These settings cause the

Test Set to trigger itself and a separate trigger command is not

necessary.

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