Agilent Technologies 6814B, 6834B, 6843A, 6813B, 6811B, 6812B manual Questionable Status Group

Programming Examples - 4

Questionable Status Group

The Questionable Status registers record signals that indicate abnormal operation of the ac source. As shown in the figure 4-5, the group consists of the same type of registers as the Status Operation group.

Register

Condition

PTR Filter

NTR Filter

Event

Enable

Command

STAT:QUES:COND?

STAT:QUES:PTR <n>

STAT:QUES:NTR <n>

STAT:QUES:EVEN?

STAT:QUES:ENAB? <n>

Description

A register that holds real-time status of the circuits being monitored. It is a read-only register.

A positive transition filter that functions as described under STAT:QUES:NTRPTR commands in Chapter 3. It is a read/write register.

A negative transition filter that functions as described under STAT:QUES:NTRPTR commands in Chapter 3. It is a read/write register.

A register that latches any condition that is passed through the PTR or NTR filters. It is a read-only register that is cleared when read.

A register that functions as a mask for enabling specific bits from the Event register. It is a read/write register.

The outputs of the Questionable Status group are logically-ORed into the QUEStionable summary bit (3) of the Status Byte register.

NOTE: In a three-phase ac source, each signal that is fed into the Questionable Status Condition register is logically-ORed from three corresponding status signals that originate from each phase. Figure 4-5 illustrates this for the OV bit; the same illustration also applies to the other bits in the Condition register.

Questionable Instrument Isummary Status Group

Although only one group of Questionable Instrument Isummary Status registers is shown in figure 4-4, there are actually three identical register groups. With the exception of bit 13, the register structure is the same as the Questionable Status group. These three register groups monitor the status signals of each individual phase of the three-phase ac source. To determine which phase of the ac source is currently selected, use:

INSTrument:NSELect?

To set or read the status registers of another phase, first use:

INSTrument:NSELect <n>

where <n> is the phase number. Then send the appropriate register commands.

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