Specifications

Reading Event

Registers

The Questionable Data, Operation Status, and Standard Event Groups all have

Event Registers. These Registers log the occurrence of even temporary status

conditions. When read, these registers return the sum of the decimal values for the

condition bits set, then are cleared to make them ready to log further events. The

commands to read these Event Registers are:

STAT:QUES:EVENT? Questionable Data Group Event

STAT:OPER:EVENT? Operation Status Group Event

*ESR? Standard Event Group Event

Clearing Event

Registers

To clear the Event Registers without reading them execute:

*CLS clears all group’s Event Registers

Reading Condition

Registers

The Questionable Data and Operation Status Groups each have a Condition

“real-time.” These registers are not latched so transient events may be missed when

the register is read. The commands to read these registers are:

STAT:QUES:COND? Questionable Data Group

Condition Register

STAT:OPER:COND? Operation Status Group

Condition Register

VT1419A Background Operation

The VT1419A inherently runs its algorithms and calibrations in the background

mode with no interaction required from the driver. All resources needed to run the

measurements are controlled by the on-board Control Processor (DSP).

The driver is required to set up the type of measurement to be run, modify

algorithm variables and to unload data from the card after it appears in the CVT or

FIFO. Once the INIT[:IMM] command is given, the VT1419A is initiated and all

functions of the trigger system and algorithm execution are controlled by its

on-board control processor. The driver returns to waiting for user commands. No

interrupts are required for the VT1419A to complete its measurements.

While the module is running algorithms, the driver can be queried for its status,

variables and algorithms can be accessed and data can be read from the FIFO and

CVT. The ABORT command may be given to force continuous execution to

complete. Any changes to the measurement set up will not be allowed until the

TRIG:COUNT is reached or an ABORT command is given. Of course any

commands or queries can be given to other instruments while the VT1419A is

running algorithms.

Programming the VT1419A Multifunction

Plus

VT1419A Background Operation

94 Chapter 3

Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com