Model 6487 Reference Manual
IEEE-488 and SCPI Conformance Information
E-3
GPIB 488.1 Protocol
The Model 6487 supports two GPIB protocols: SCPI (488.2) and 488.1. The 488.1 proto-
col is included to significantly increase speed over the GPIB.
When using the 488.1 protocol, throughput is enhanced up to 10 times for data sent to the
6487 (command messages) and up to 20 times for data returned by the Picoammeter
(response messages). The speed of readings sent over the GPIB is also increased.
klqb
With the 488.1 protocol selected, you will still use SCPI commands to program
the Model 6487. Operation differences between the two protocols are discussed
in this appendix.
(15)
(16)
(17)
(18)
(19)
(20)
(21)
(22)
(23)
Macro information.
Response to *IDN (identification).
Storage area for *PUD and *PUD?
Resource description for *RDT and *RDT?
Effects of *RST, *RCL, and *SAV.
*TST information.
Status register structure.
Sequential or overlapped commands.
Operation complete messages.
Not applicable.
See Common Commands in
.
Not applicable.
Not applicable.
See Common Commands in
.
See Common Commands in
.
See Status Structure in
All are sequential except :INIT which is
overlapped.
*OPC, *OPC?, and *WAI; see
Common Commands in
.
Table E-2
Coupled commands
Sending
Changes
To
CALC2:NULL:ACQ
TRAC:POIN <n>
TRAC:CLE
CALC2:NULL:OFFS <n>
TRAC:FEED:CONT <name>
TRAC:FEED:CONT <name> TRAC:CLE
Acquired value
NEV
NEV
Table E-1 (cont.)
IEEE-488 documentation requirements
Requirements
Description or Reference