Register Programming
Registers
There are two sets of associated registers:
rn
VXIbus standard configuration registers
-
these are part of the
VXIbus mainframe configuration and therefore are not discussed
here, information can be obtained from the VXIbus System
Specification.
rn
Device dependent or slave registers
-
these registers are provided in
the HP
E1440A
and are the subject of this manual appendix.
Status Reporting
The HP
E1440A
supports SCPI standard status register
configuration,
as
defined in
IEEE 488.2
Error Queue
The instrument maintains an error queue according to the SCPI
standard. The error queue is able to queue up to
30
errors.
Y
Status
Registers
The
HP
E1440A
has a set of status registers that can be interrogated
by the controller. Any error conditions which are contained in these
registers are also entered in the error queue. If required, registers can
be pre-loaded with values which will mask out certain conditions.
he
registers are identified as follows:
Register Contents (Flags)
Quest. Frequency
Ext ref missing, Ext ref unlocked, Main VCO unlock
1
Quest. Status Voltage, Freq.
Standard Event Status Operation complete, Query error, Dev. dep. error,
Execution error, Command error, Power on
Operation Status Calibrating, Sweeping
Status Byte
Quest. summary, MAV, ESB, RQS, Operational summary
Register
Programming
B-1
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