14-16 Status Structure
Questionable Event Register
The used bits of the Questionable Event Register (shown in Figure 14-7) are described as
follows:
• Bits B0 through B7 — Not used.
• Bit B8, Calibration Summary (Cal) — Set bit indicates that an invalid calibration con-
stant was detected during the power-up sequence. This error will clear after successful
calibration of the instrument.
• Bits B9 through B13 — Not used.
• Bit B14, Command Warning (Warn) — Set bit indicates that a Signal Oriented Mea-
surement Command parameter has been ignored.
• Bit B15 — Not used.
Condition registers
As Figure 14-1 shows, each status register set (except the Standard Event Register set) has a
condition register. A condition register is a real-time, read-only register that constantly updates
to reflect the present operating conditions of the instrument. For example, while the Source-
Meter is in the idle state, bit B10 (Idle) of the Operation Condition Register will be set. When
the instrument is taken out of idle, bit B10 clears.
The commands to read the condition registers are listed in Table 14-5. For details on reading
registers, see Reading registers.
Questionable Event
Enable Register
&
&
OR
To QSB of Status
Byte Register
(Figure 15-3)
Warn = Command Warning
Cal = Calibration Summary
& = Logical AND
OR = Logical OR
—
(B7 - B0)
CAL
(B8)
—
(B13 - B9)
—
(B15)
Warn
(B14)
Questionable
Condition Register
Questionable
Event Register
—
(B7 - B0)
CAL
(B8)
—
(B13 - B9)
—
(B15)
Warn
(B14)
—
(B7 - B0)
CAL
(B8)
—
(B13 - B9)
—
(B15)
Warn
(B14)
stat:ques:cond?
stat:ques?
stat:ques:enab <NRf>
stat:ques:enab?
gure
-
Questionable
event status
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