Agilent Technologies E1441A trigger source, The command sequence to configure this mode is

trigger source.

Counted Burst Modulation Output

burst ends when

count reached

burst starts on rising edge

Burst Modulation Trigger Signal (INTernal timer shown)

1/(Burst Rate)

Figure 2-3. Counted Burst Mode with INTernal Trigger

The command sequence to configure this mode is:

APPLY:<shape>		<freq>,<ampl>,<offset>		set up wave form
BM:STATE	ON		enable burst modulation
BM:SOURce	INTernal		this selects the "counted" mode
TRIG:SOURce		INTernal	trigger from internal trigger
			timer
BM:NCYCles	<cycle_count>		set the burst count
BM:INTernal:RATE <frequency>			set the burst rep rate

Figure 2-3shows the operation of the counted burst mode with external trigger source.

Counted Burst Modulation Output

burst ends when count reached

burst starts on edge set by TRIG:SLOPE

Burst Modulation Trigger Signal (TRIG:SOUR EXT, :SLOPE POS)

Figure 2-4. Counted Burst Mode with EXTernal Trigger

The command sequence to configure this mode is:

APPLY:<shape>		<freq>,<ampl>,<offset>		set up wave form
BM:STATE	ON		enable burst modulation
BM:SOURce	INTernal		this selects the "counted" mode
TRIG:SOURce		EXTernalTTLTRG<0-7>BUS		use external trigger
BM:NCYCles	<cycle_count>		set the burst count

34 Agilent E1441A Application Information Chapter 2