To Trigger When Expected Data Does Not Appear When Requested - Agilent Technologies HP 1660E Series User Manual

Logic analyzers

Table of Contents

Triggering Examples

Single-Machine Trigger Examples

To trigger when expected data does not appear

when requested

1 Go to the timing analyzer's Trigger menu.

2 Define a term called DATA to represent the expected data, the

Edge1 term to represent the chip select line of the remote

device, and the Timer1 term to identify the time limit for

receiving expected data.

You can rename the Edge1 and Timer1 terms to match the problem

domain, for example, to REM_SEL and ACK_TIME.

3 Under Timing Sequence Levels, enter the following sequence

specification:

• Find "REM_SEL" Occurs "1" Else on "no state" go to level "1"

• TRIGGER on "ACK_TIME > 16.00 ms" Occurs "1" Else on "DATA" go to

You will need to start ACK_TIME timer (Timer1) upon entering this

state. You do this using the Timer Control field in the menu for

sequence level 2.

Troubleshooting