Boonton 4540 Peak Power Meter User Manual - Manual (Page 215)

Boonton 4540 Series RF Power Meter
Remote Operation 5-81
TRIGger:SOURce
Description: Set or return the trigger source used for synchronizing data acquisition. The CH1 and CH2
(Model 4542 only) settings use the signal from the associated sensor. EXT setting uses the signal
applied to the rear panel TRIG IN connector.
Syntax: TRIGger:SOURce <character data>
Argument: <character data> = {CH1, CH2, EXT}
Valid Modes: Pulse mode only
TRIGger:VERNier
Description: Set or return the fine position of the trigger event on displayed sweep. The position is given in
divisions relative to the left edge of the screen, so with zero trigger delay, setting the vernier
control to 0.0 causes the entire trace to be post-trigger. Setting it to 10.0 causes the entire trace to
be pre-trigger. And setting to 5.0 will display both the pre- and post-trigger portions of the trace.
Note that the TRIGger:DELay setting is in addition to this setting, and will cause the trigger
position to appear in a different location. Setting the trigger vernier places the 4540 in trigger
vernier mode, which overrides the fixed “Left, Middle, Right” settings of the TRIGger:POSition
command.
Syntax: TRIGger:VERNier <numeric_value>
Argument: <numeric_value> = –30.0 to 30.0 divisions
Valid Modes: Pulse mode only