Fluke PM-3380B, PM-3390B, PM-3370B, PM-3394B, PM-3384B user manual Trigger Slope, Trigger Coupling

USING THE COMBISCOPE INSTRUMENTS 3 - 21

Trigger Slope

The TRIGger:SLOPe command allows you to define the trigger edge for all input channels, which can be POSitive, NEGative, or EITHer. After a *RST command the TRIGger:SLOPe is set to POSitive.

PROGRAM EXAMPLE:

CALL Send(0, 8, "CONFigure:PTPeak (@2)", 1) ’Configures channel 2 CALL Send(0, 8, "SENSe:FUNCtion 'XTIMe:VOLTage2'", 1)’Sets channel 2 ON

CALL	Send(0,	8,	"TRIGger:SOURce INTernal2", 1)	’Trigger source = channel 2
CALL	Send(0,	8,	"TRIGger:LEVel 0.2", 1)	’Trigger level = 0.2 V

'The TRIGger:LEVel command also switches level peak-peak off.

CALL Send(0, 8,	"TRIGger:SLOPe NEGative", 1)	’Trigger slope = negative
CALL Send(0, 8,	"INITiate", 1)	’Single initiation
CALL Send(0, 8,	"FETCh:PTPeak? (@2)", 1)	’Queries for peak-to-peak
response$ = "	"
CALL Receive(0,	8, response$, 256)	’Enters peak-to-peak
PRINT "Measured	peak-to-peak = "; response$	’Prints peak-to-peak

Trigger Coupling

The TRIGger:LPASs and TRIGger:HPASs commands allow you to select the Main Time Base (MTB) trigger coupling by programming a fixed cutoff frequency. The possible trigger coupling options AC coupling, DC coupling, Low Frequency reject, and High Frequency reject are mutually exclusive. The TRIGger:LPASs and TRIGger:HPASs commands are also mutually exclusive. So, activating the Low-Pass filter will switch off the High-Pass filter, and vice versa. After a *RST command, the cutoff frequency is 10 Hertz, which selects trigger coupling AC.

Note: When the trigger source is INTernal<n>, signal coupling for one input channel (n) can be programmed to AC, DC, or GROund using the INPut<n>:COUPling command.