Agilent Technologies A.18.00 Manual Do Utilizador

Chapter 7, IBASIC Controller

The dedicated GPIB interface at select code 8 conforms to the IEEE 488.2 Standard in all

respects but one. The difference being that each instrument on the bus does not have a
unique address. The Instrument Control Hardware determines which instrument is being
addressed with the command syntax. As such an explicit device address does not have to
be specified. The address 800 and 814 are equally correct. 

An IBASIC PROGram subsystem has been developed to allow the external 
BASIC language controller to download programs to the Test Set through GPIB 
(refer to the 

 for more information 

on the PROGram Subsystem). Four commands from the external BASIC 
language controller to the Test Set are necessary to transfer the program. The 
commands are executed serially allowing enough time for each command to finish 
executing. (The Test Set’s GPIB 

 field must be set to 

, and the 

TESTS (IBASIC CONTROLLER) screen must be displayed). 

 

Deletes any programs that reside in Test Set RAM. 

 

Defines the address in Test Set RAM where the downloaded program will be stored. 

 

Causes all program lines to transfer over GPIB to the Test Set which is at address 
714. 

 

Defines end of download process by generating an EOI command. 

After the above commands complete the program code will be in the Test Set 
ready to run. If any bugs are detected when the program is run, the program can be 
uploaded back into the external BASIC language controller to correct the error. 
Alternately the full screen IBASIC EDIT function through RS-232 can be used to 
correct the error (refer to 

 for details). 

After the program is working properly in the Test Set IBASIC environment, it 
should be stored for backup purposes.