User`s guide

40-9
Trigger Subsystem
SOURce
SOURce
Description Selects/queries the measurement TRIGger SOURce.
Syntax TRIGger:SOURce?
TRIGger:SOURce <string>
Options ’EXT MEAS’ | ’EXT DEMOD’ | ’RF RISE’
Where;
• EXT MEAS means the measurement is triggered from an external trigger signal that is
normally intended for doing measurements.
• RF RISE means the measurement is triggered automatically when a rising edge is
detected on the RF envelope of the input.
• EXT DEMOD means the measurement is triggered from an external trigger signal that
is normally intended for doing demod.
UMEMory:SOURce
Description Selects/queries the USE MEM (Use MEMory) TRIGger SOURce.
Syntax TRIGger:UMEMory:SOURce?
TRIGger:UMEMory:SOURce <string>
Options ’EXTERNAL’ | ’BAD SYNC’
Where;
• BAD SYNC means that the UMEMory (USE MEM) memory will be automatically
filled when the Demod Sync Status changes from ’No Error’ to ’Bad Sync’
(DDEMod:SYNC:SSTatus?).
• EXTERNAL means that the UMEMory (USE MEM) memory will be automatically
filled when an external line on the SYSTEM BUS connector on the rear panel is in a
particular state when a valid demod trigger occurs.