Query Commands GPIB Operation
8-4 PN: 10585-00001 Rev. P ML2437A/38A OM/PM
8-2 Query Commands
Many ML24XXA (native) GPIB commands have an equivalent query command that will
return a current value or setting. Query commands and their returned strings are provided
with each command where applicable.
A complete listing of valid query commands and returned strings is provided in Appendix C.
8-3 GPIB PC Card Setup
The following GPIB driver configuration set up is recommended for reliable GPIB
communication with the ML243xA Power Meter. The set up is expressed in the terms used by
the National Instruments GPIB ISA and PCI cards and drivers for Windows and DOS.
GPIB Device Template
The ML243xA default primary address is 13. Separate device templates for the primary
address of each device can usually be set up separately. The settings for the device template
for the ML243xA are shown in the table below.
GPIB Card Settings
The recommended GPIB card settings for use with the ML243xA are shown in the table
below.
Table 8-2. Template Settings
Item Setting
Set EOI with EOS on write YES
Type of compare on EOS 8 bit
EOS byte 0x0A (10 decimal)
Send EOI at end of write YES
Readdressing YES
Secondary address NONE
Table 8-3.
item Settings
Terminate read on EOS No
Set EOI with EOS on writes YES
Type of compare on EOS 8 bit
EOS byte 0x0A (10 decimal)
Send EOI at end of write YES
System controller YES
Assert REN when SC YES
Enable Auto Serial polling NO
NI card. Cable length for HS488 OFF
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