Teledyne SP Devices ADQ14, User Manual

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Classification Revision
Public PA1
Document ID Print date
18-2074 2018-04-06
Figure 1: A block diagram presenting the main features of the ADQ14-FWPD data path.
• Digital baseline stabilizer
The digital baseline stabilizer (DBS) provides a highly accurate and stable baseline, specifically
intended for pulse applications. Additional information on the DBS is provided in Section 4.1 .
• Moving average
The moving average function tracks the baseline of the signal using a configurable window looking
at the last 100 samples. Tracking the baseline allows the user to input the pulse specification rela-
tive to the baseline rather than in absolute ADC codes. The moving average function is discussed
further in Section 4.2 .
• Acquisition engine
The acquisition engine is tasked with creating records of data. Each channel is configured inde-
pendently and requires a trigger condition and a specification of the horizontal parameters.
– Trigger
The trigger condition may be selected from one of the three global trigger sources: external
trigger, internal trigger or software trigger. The latter is mainly used for debugging purposes
and has limited practical application. In this case, the selected source is shared among all
channels using the global trigger source. Another option is to use the level trigger, in which
case each channel operates independently since the trigger condition is detected by analyzing
the local data stream. The ways to trigger a record are discussed throughout Section 4 ,
particularly in Sections 4.4 , 4.6 and 4.11 .
– Coincidence
The coincidence function allows the user to impose additional conditions to the trigger mecha-
nism. Each channel has a configurable logic OR expression which needs to evaluate to true in
order for a record to be generated from a trigger event. An example of a coincidence condition
is provided below.
ADQ14-FWPD – User Guide www.teledyne-spdevices.com Page 5 of 28