Table of Contents
Advertisement
SCPI-defined Status Registers
The Instrument has two 16-bit SCPI-defined status structures, the operation status register
and the questionable data register. These are 16 bits wide, while the status byte and the
standard status groups are 8 bits wide. See Figure 5B-12.
Operation Status Group
Only bits 3 and 5 are used by the Instrument in this register.
Bit 5 (weight 32) — Waiting for Trigger
This bit shows when the Instrument is ready to start a new sweep via the trigger control
option. The Instrument is now in the wait for the trigger state of the trigger model.
Bit 3 (weight 8) — Sweep In Progress
This bit shows that the Instrument is sweeping. It is set when the sweep has been
triggered. For internally triggered sweeps, it is set at the same time as the Waiting for
trigger bit.
Summary, Operation Status Reporting
:STAT:OPER:ENAB
Enable reporting of Operation Status in the status byte.
*SRE 128
Enable SRQ when operation status has something to report.
:STAT:OPER?
Reading and clearing the event register of the Operation Status Register structure
:STAT:OPER:COND?
Reading the condition register of the Operation Status Register structure.
Questionable Data/Signal Status Group
The Questionable Data Status reports when the output data from the Instrument may not
be trusted.
Bit 11 (weight 2048) — External AM or FM Overload
This bit shows that the external AM or FM signal that is being applied to the Instrument
is too large.
Bit 10 (weight 1024) — Head Serial Number Mis-match
This bit is set when the head that is plugged in (50 Ω or 75 Ω) to the Instrument was not
calibrated with this base unit.
Bit 3 (weight 8) Frequency
The Instrument sets this bit true when it has lost frequency lock.
Bit 0 (weight 1) Voltage
The Instrument sets this bit true when it cannot level the output voltage.
Power-on Status Clear
Power-on clears all event enable registers and the service request enable register if the
power-on status clear flag is set TRUE (see the common command *PSC.)
SCPI and IEEE Bus Descriptions
Status Reporting System
4B
4B-23
Advertisement
Table of Contents
