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130 Chapter 6

O:\Manuals\E6380A_Progguid\Book\Advoper.fm

Advanced Operations

Status Reporting

Status Reporting Structure Operation

In general the status reporting structure described on the previous

pages is used as follows:

• Determine which conditions, as defined by their bit positions in the

Condition Register, should cause the Summary Message to be set

TRUE if they occur.

For example, Condition Register Bit 3 = Overpower Protection

Tripped

• Determine the polarity of the bit-state transition which will indicate

the condition has occurred.

For example,

— logic 0 = Overpower Protection not tripped

— logic 1 = Overpower Protection tripped

— occurrence indicated by a 0 to 1 transition

— use positive transition (PTR) filter for bit 3

• Set the Transition Filters to the correct polarity to pass the bit-state

transition to the Event Register.

For example,

1. Set Positive Transition Filter bit 3 to 1, all other bits to 0.

2. Set Negative Transition Filter bit 3 to 0, all other bits to 0.

• Set the correct bits in the Enable Register to generate the Summary

Message if the condition has been latched into the Event Register.

For example,

Set bit 3 of the Enable Register to a logic 1, all other bits to 0.

• Repeat these steps for any register containing the Summary

Message bit.

Status Queue Model

This section explains how status queues are structured in the Test Set.

The generalized status queue model shown in Figure 6-4 is the basis

upon which all the status queues in the Test Set are built. A queue is a

data structure containing a sequential list of information. The queue is

empty when all information has been read from the list. The associated

Summary Message is TRUE, logic 1, if the queue contains some

information and FALSE, logic 0, if the queue is empty. Queues can be

cleared by reading all the information from the queue. Queues, except

the Output Queue, can also be cleared using the *CLS (clear status)

command. A status queue can also be referred to as a Status Register

Group.

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Agilent Technologies 8935 Series Manual do Utilizador Página 130