Instructions

T3VNA Programming Guide 63
Parameter
Range
IMMediate: free-run triggering.
VIDeo: triggers on the video signal level.
EXTernal: allows you to connect an external trigger source.
Return Enumeration
Default IMMediate
Menu Trigger
Example :TRIGger:SOURce IMMediate
3.8.2 Video Trigger Level
(:TRIGger[:SEQuence]:VIDeo:LEVel)
Command
Format
:TRIGger[:SEQuence]:VIDeo:LEVel <value>
:TRIGger[:SEQuence]:VIDeo:LEVel?
Instruction Specifies the level at which a video trigger will occur. Video is adjusted using
this command, but must also be selected using the command.
Gets video Trigger Level.
Parameter
Type
Float, unit: dBm, dBmV, dBuV, V, W
Parameter
Range
Unit is dBm: -300 dBm ~ 50 dBm
unit is dBmV: -253.01 dBmV ~ 96.99 dBmV
unit is dBuV: -193.01 dBuV ~ 156.99 dBuV
unit is Volts: 223E-16V ~ 70.71 V
unit is Watts: 1.00E-33 W ~ 100 W
Return Float, unit: dBm, dBmV, dBuV, V, W
Default 0 dBm
Menu Trigger > Video Level
Example :TRIGger:VIDeo:LEVel 0.5 dBm
3.8.3 Trigger Edge
(:TRIGger[:SEQuence]:RFBurst:SLOPe)
Command
Format
:TRIGger[:SEQuence]:RFBurst:SLOPe POSitive|NEGative
:TRIGger[:SEQuence]:RFBurst:SLOPe?
Instruction This command activates the trigger condition that allows the next sweep to start
when the external voltage (connected to EXT TRIG IN connector) passes
through approximately 1.5 volts. The external trigger signal must be a 0V to
+5V TTL signal. This function only controls the trigger polarity (for positive or
negative-going signals).
Gets Trigger edge.
Parameter
Type
Enumeration
Parameter
Range
POSitive: positive edge.
NEGative: negative edge.
Return Enumeration
Default POSitive
Menu Trigger > External Trigger
Example :TRIGger:RFBurst:SLOPe POSitive