HP 1660, 70 manual Define a Term for the Timing Trigger

Introduction to Timing Analysis

Define a Term for the Timing Trigger

Define a Term for the Timing Trigger

For the analyzer to capture the data you want, you need to tell it what to trigger on by defining a term. Trigger terms are variables that you can use to tell the analyzer when to start recording data, what to store, and when to stop.

In this exercise, you will set up the analyzer to trigger when the counter on the training board reaches its maximum value of 255, or FF (hex). To do this, you will assign the hex value FF to term "a" of TCOUNT.

1Press the Trigger MENU key.

2Highlight the base field under TCOUNT and press the Select key.

3Highlight Hex in the pop-up menu, press the Select key.

Hex is the default setting. Notice the other display options other than hex.

4Under TCOUNT, highlight the field to the right of term a, enter FF, and press the Done key.

The base field specifies the type of values entered. In this exercise you selected Hex and entered the hex value FF.

A term is a variable that stores a value.

	Defining a Term for the Timing Trigger
Result	TCOUNT’s term "a" is assigned the value FF. The "a" term is a variable that
	the analyzer will trigger on once you set up the trigger specification in the
	next exercise.

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