Root (:) Commands 7
Keysight InfiniiVision 4000 X-Series Oscilloscopes Programmer's Guide 259
:ACTivity
(see page 1610)
Command Syntax
:ACTivity
The :ACTivity command clears the cumulative edge variables for the next activity
query.
Query Syntax
:ACTivity?
The :ACTivity? query returns whether there has been activity (edges) on the digital
channels since the last query, and returns the current logic levels.
Return Format
<edges>,<levels><NL>
<edges> ::= presence of edges (16-bit integer in NR1 format).
<levels> ::= logical highs or lows (16-bit integer in NR1 format).
bit 0 ::= DIGital 0
bit 15 ::= DIGital 15
See Also • "Introduction to Root (:) Commands" on page 258
• ":POD<n>:THReshold" on page 703
• ":DIGital<d>:THReshold" on page 399
Because the :ACTivity? query returns edge activity since the last :ACTivity? query, you must
send this query twice before the edge activity result is valid.
A bit = 0 (zero) in the <edges> result indicates that no edges were detected on that channel
(across the specified threshold voltage) since the last query.
A bit = 1 (one) in the <edges> result indicates that edges have been detected on that channel
(across the specified threshold voltage) since the last query.
(The threshold voltage must be set appropriately for the logic levels of the signals being
probed.)
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