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Remote Control

Use the :CONDition? query commands in the STATus Subsystem to read the

condition registers.

1.4 Event registers

As Figure shows, each status register set has an event register. An event

condition register, once a bit in an event register is set, it remains set (latched)

until the register is cleared by a specific clearing operation. The bits of an event

and applied to an OR gate. The output of the OR gate is applied to the Status

Byte Register.

Use the *ESR? Common Command to read the Standard Event Register. All

other event registers are read using the :EVENt? query commands in the

STATus Subsystem.

An event register is cleared when it is read. The following operations clear all

event registers:

 Cycling power

 Sending *CLS

1.5 Enable registers

As Figure shows, each status register set has an enable register. An enable

event register. An event bit is masked when the corresponding bit in the enable

bit in the Status Byte Register (1 AND 0 = 0).

To use the Status Byte Register to detect events (i.e., serial poll), you must

unmask the events by setting (1) the appropriate bits of the enable registers. To

program and query the Standard Event Status Register, use the *ESE and

*ESE? Common Commands respectively. All other enable registers are

programmed and queried using the :ENABle and :ENABLe? commands in the

STATus Subsystem.

An enable register is not cleared when it is read. The following operations affect

the enable registers:

 Cycling power - Clears all enable registers

 :STATus:PREset clears the following enable registers:

 Operation Event Enable Register

 Questionable Event Enable Register

 Channel Summary Event Enable Register

 *ESE 0 - Clears the Standard Event Status Enable Register.

ITech IT8731 Programming Guide

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