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4.3.3
Phase of Burst
Phase of pulse train is phase at starting point of pulse train. It is in the range of -360°~+360°. The default initial phase is 0°.
To change it, you can use the multi-functional control and direction keys on the interface for selecting type of pulse train or
press soft function key Phase.
•
For sine wave, square wave, sawtooth wave and pulse wave, 0° is the point at which the waveform passes 0V
(or DC offset value) in forward direction.
•
For arbitrary waveform, 0° is the first waveform point downloaded to the storage.
•
Initial phase has no effect on the noise wave.
4.3.4
Period of Burst
Burst period (period of pulse train) is only applicable to N cycle mode, and is defined as the time from one pulse train to
the next pulse train. When trigger source is external or manual, burst period (period of pulse train) will not be shown in the
parameter list. The range of burst period (period of pulse train) is 1µs~500s; the default “burst period” is 1ms. To change it,
you can use the multi-functional control and direction keys or press the soft key Period after selecting type of pulse train
as N cycle.
•
Burst period (period of pulse train) ≥ waveform period ×recurring number (number of pulse trains). The waveform
period is reciprocal of waveform frequency mentioned in “select pulse train”.
•
If burst period (period of pulse train) is too short, signal generator will automatically increase the period to allow
output of a designated number of cycles.
Figure 4- 138 Set period of pulse train
4.3.5
Counting of Burst
In N cycle mode, counting of pulse train is used to designate the number of waveform cycles. It is in the range of 1~50000
periods and 1 by default. To change it, you can use the multi-functional control and direction or press soft function key
Cycles after selecting the type of pulse train as “N cycle”.
•
Recurring number≤ burst period × waveform frequency
•
If recurring number exceeds the above limit, signal generator will automatically increase period of pulse train to
adapt to the designated counting of pulse train (without changing waveform frequency).
