10
Trigger modes
The LDP-QCW supports tree different trigger modes as explained below
Internal
Internal
Internal
Internal
The pulse generation is performed by an internal pulse generator. The pulse width and repetition
rate is user configurable via the PLB-21 or the serial interface.
In addition, the number of pulses to be generated can be configured. To use this feature the
wie soll das gehen?
user has to set the TRG_COUNT bit in the LSTAT register to “1”. The current output is automatically
disabled after an internal counter reaches the configured value. The counter is reset by setting the
L_ON bit of the LSTAT register to “0” or by setting the ENABLE pin to 0V.
Please note that the maximum pulse width depends on the current repetition rate as well as the
maximum repetition rate on the current pulse width.
The following diagram shows an example of generated pulses. The lower graph shows the internal
pulse generator, the upper two graphs the trigger pulses generated out of it.
meaning
T
1
enabling of the output
T
1
-T
2
The delay between output enable and the first generated pulse depends on the
configured repetition rate. It nearly equals the pulse pause time.
T
2
-T
3
Pulse rise time. It depends on the load inductance.
T
4
-T
5
Pulse fall time. It depends on the load inductance.
T
6
disabling of the output
T
7
re-enabling of the output
