Tektronix Keithley SourceMeter 2470, Reference Manual

Page: 839 / 995

2470 High Voltage SourceMeter Instrument Reference Manual Section 14: TSP command reference
2470-901-01 Rev. A /
May
2019 14-199
trigger.digin[N].edge
This attribute sets the edge used by the trigger event detector on the given trigger line.
Type TSP-Link accessible Affected by Where saved Default value
Attribute (RW) Yes Restore configuration
Instrument reset
Power cycle Configuration script trigger.EDGE_FALLING
Usage
detectedEdge = trigger.digin[ N ].edge
trigger.digin[ N ].edge = detectedEdge
detectedEdge The trigger logic value:

Detect falling-edge triggers as inputs:
trigger.EDGE_FALLING

Detect rising-edge triggers as inputs:
trigger.EDGE_RISING

Detect either falling or rising-edge triggers as inputs:
trigger.EDGE_EITHER

See Details for descriptions of values
N Digital I/O trigger line (1 to 6)
Details
This command sets the logic on which the trigger event detector and the output trigger generator
operate on the specified trigger line.
To directly control the line state, set the mode of the line to digital and use the write command. When
the digital line mode is set for open drain, the edge settings assert a TTL low-pulse.
Trigger mode values
Value Description
trigger.EDGE_FALLING Detects falling-edge triggers as input when the line is configured as an input or
open drain
trigger.EDGE_RISING
Detects rising-edge triggers as input when the line is configured as an open
drain
trigger.EDGE_EITHER Detects rising- or falling-edge triggers as input when the line is configured as
an input or open drain
Example
digio.line[4].mode = digio.MODE_TRIGGER_IN
trigger.digin[4].edge = trigger.EDGE_RISING
Sets the trigger mode for digital I/O line 4 to
detect a rising-edge trigger as an input.
Also see
digio.line[N].mode (on page 14-52)
digio.line[N].reset() (on page 14-53)
digio.writeport() (on page 14-56)
Digital I/O port configuration (on page 8-13)
trigger.digin[N].clear() (on page 14-198)