Intermodule Measurements
To use a timing analyzer to detect a glitch
To use a timing analyzer to detect a glitch
The following setup uses a state analyzer to capture state flow occurring at the time of the glitch. This can be useful in troubleshooting. For example, you might find that the glitch is ground bounce caused by a number of simultaneous signal transitions.
1Select the Intermodule menu.
2Select the timing analyzer from the Modules list and set it to Group Run. Select the state analyzer and set it to respond to the arm signal from the timing analyzer.
You must have fully independent state and timing analyzers to make this type of measurement. For example, though the HP 16550A can be configured to use some of its channels for a state analyzer and some for a timing analyzer, it cannot present those analyzers independently for intermodule measurements.
3Select the timing analyzer Trigger menu.
4Select an Edge term. Then assign glitch detection “*” to the channels of interest represented by the Edge term.
5Select the state analyzer Trigger menu.
6Set the analyzer to trigger on any state and store any state.
7Select Group Run in the upper right corner of the display.
If you don’t see the activity of interest in the state trace, try changing the trigger position using the Acquisition Control field in the Trigger menu of the state analyzer. By changing the Acquisition mode to manual, you can position the trigger at any state relative to analyzer memory.
The timing analyzer can detect glitch activity on a waveform. A glitch is defined as two or more transitions across the logic threshold between adjacent timing analyzer samples.
