BNC 645 - Manual (Page 60)

60
Table 4.13-1
The available parameters in each burst mode.
Burst
Count
Burst
Period
Burst
Phase
Ext Trig
Signal
Polarity
Internal
√ √ √
Triggered
mode External,
Manual
√ √
Gated mode √ √
Burst Count
The Burst Count represents the number of cycles appeared in each burst.
It is only used in the triggered burst mode. The default burst count is 1
cycle, and the range is from 1 to 50,000 cycles in 1 cycle increment. One
may also set an infinite burst count.
When the trigger source is set to internal, the waveform generator
outputs bursts repeatedly at a rate determined by the specified burst
period, which represents the time interval between the start times of two
consecutive bursts. The burst count must be less than the product of the
burst period and the waveform frequency:
BurstCount < BurstPeriod x WaveformFrequency
The waveform generator will automatically increase the burst period up
to its maximum allowable value to accommodate the specified burst
count. The waveform frequency is not affected by burst count.
The burst count does not apply in the gated mode. If a new burst count
is specified in the gated mode, the waveform generator will remember it
and use it when the triggered mode is selected.
Waveform Frequency
The waveform frequency defines the frequency of the output waveform
while trigger signal is logic true. In the triggered mode, the specified
number of cycles is outputted at the waveform frequency. In the gated