Time Controller Series User Manual
Section 6: Operating the Time Controller Software
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•
Channel:
Flip the toggle switch next to each channel name to make that channel active
(green) or inactive (grey).
•
Threshold (mV):
Set the voltage (in millivolts) that corresponds to a detection event on the
incoming pulse. Any incoming pulses that fail to reach this threshold level will be
disregarded.
•
Edge:
Select whether a detector count is registered on the rising or falling edge of an
incoming pulse. A count is registered at the time the incoming pulse reaches the threshold
voltage on the
pulse’s
rising or falling edge (as selected).
•
Delay:
Specify a relative signal delay on each channel as required (up to 1 s with 1 ps
precision).
•
Frequency (Hz):
View the single-channel count rate with the specified Threshold and Edge
choices.
6.2.3
Configuring Output Channels
In the Delay / pattern generator workspace of the Time Controller software, there are four
pulse / pattern generators that can each be configured and mapped to one or more output
channels.
To produce a user-
created signal for one of the generators, select ‘Internal’ trigger, and select the
duration of a single period of the pattern in the ‘Period’ field.
Figure 17: Delay / pattern generator configuration view
To generate a signal triggered by one of the input channels,
select ‘External’ trigger, and specify the
input channel Source, Edge and Threshold choices, similar to Section 6.2.2. Given these choices, you
will see the rate of pulses being generated in the ‘Frequency’ field.
There are three choices for the type of pulse pattern:
1.
Clock:
(Internal trigger only) The generator produces a binary pulse train with a 50% duty
cycle and periodicity specified in the trigger’s ‘Period’ field.
2.
Single Pulse:
At the start of each internal triggered period, or on registering an external
trigger event, the generator outputs a single pulse of a
duration specified in the ‘Pulse width’
field.
3.
Multiple pulse:
At the start of each internal triggered period, or on registering an external
trigger event, the generator outputs a train of up to seven pulses, each pulse with an
identical duration specified in the ‘Pulse width’ field
, and where the number of pulses and