Signal Conditioning
The hardware Trigger and EndTrigger signals issued from differential inputs are conditioned before being applied to the acquisition controller.
Each signal is sampled at a constant frequency of 50 MHz and flows through a digital filter.
With such a filter:
- All the pulses having a duration larger than THIGH[ns] are transmitted to the output.
- All the pulses having a duration smaller than TLOW[ns] are blocked.
- Pulses having duration in between the above mentioned limits can be transmitted or blocked.
The following table shows for each possible value of the respective TrigFilter and EndTrigFilter parameters:
- TLOW[ns]: the lower limit of the time constant
- THIGH[ns]: the upper limit of the time constant
TrigFilter |
TLOW[ns] |
THIGH[ns] |
Note |
OFF |
96 |
112 |
|
ON |
496 |
512 |
|
MEDIUM |
496 |
512 |
|
STRONG |
2496 |
2512 |
Default value |
Note. TrigFilter and EndTrigFilter are not relevant for isolated inputs.