User`s guide

6-10

Status Reporting

Service Request Enable Register (SRER)

Setting the Service Request Enable Register bits enable corresponding bits in

the Status Byte Register. These enabled bits can then set RQS and MSS (bit 6)

in the Status Byte Register.

Bits are set in the Service Request Enable Register using the *SRE command

and the bits that are set are read with the *SRE? query.

Refer to figure 6-2.

Example The following example sets bit 4 (MAV) and bit 5 (ESB) in the Service Request

Enable Register.

OUTPUT 707;"*SRE 48"

This example uses the parameter 48 to enable the oscilloscope to generate an

SRQ interrupt under the following conditions:

• When one or more bytes in the Output Queue set bit 4 (MAV).

• When an enabled event in the Standard Event Status Register generates a

summary bit that sets bit 5 (ESB).

Trigger Event Register (TRG)

This register sets the TRG bit in the status byte when a trigger event occurs.

The TRG event register stays set until it is cleared by reading the register or

using the *CLS command. If your application needs to detect multiple triggers,

the TRG event register must be cleared after each one.

If you are using the Service Request to interrupt a program or controller

operation, you must clear the event register each time the trigger bit is set.