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LTDVE4CH-20 | INSTRUCTIONS MANUAL
•
No filtering (pass through)
•
Filtering with a 10µs time constant
•
Filtering with a 20µs time constant
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Filtering with a 50µs time constant
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Filtering with a 100µs time constant
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Filtering with a 200µs time constant
•
Filtering with a 500µs time constant
Setting of the filters can be done using the serial RS485 or Ethernet interfaces.
12.3. Input multiplexers
The input multiplexers are used to send the filtered inputs to the pulse generators. There are eight
input multiplexers organized in a 5x8 routing matrix.
Each multiplexer can have its output selected from one of the following sources:
•
No selection
•
Filtered synchronization input 1 (TR1)
•
Filtered synchronization input 2 (TR2)
•
Filtered synchronization input 3 (TR3)
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Filtered synchronization input 4 (TR4)
•
Free running oscillator
The free running oscillator is an autonomous asynchronous trigger source described in detail in the
. Setting of the input multiplexers can be done using the serial RS485 or Ethernet
interfaces.
12.4. Pulse generator
There are eight pulse generators. Each of them is characterized by two parameters: pulse delay and
pulse width. The pulse delay can range from 0 µs to 1,023,000 µs with variable resolution. The pulse
width can range from 1 µs to 1,023,000 µs with variable resolution.
The diagram in
Figure 6: time diagram of pulse generator
describes the relationship between input
and output. As depicted, the rising edge of the input signal triggers the generator, while the falling
edge has no special meaning and can happen anywhere in time.
Figure 6: time diagram of pulse generator
Setting of the pulse generators can be done using the serial RS485 or Ethernet interfaces.
delay
width
input
output
