Agilent Technologies 93000 SOC Series Training Manual page 334

Lesson 3 – Setting Up the Digital Capturing
The number of vectors taking samples must be multiple of 64.
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The multiple of 64 is necessary because the data transfer to the
vector memory during capturing (writing), and also from the
vector memory when retrieving captured data (reading) is
performed in blocks of captured data of 64 vectors.
If the number of vectors is not an integer multiple of 64, the
remaining samples that exceed the last 64 vectors will be lost.
In the example of vectors for Sequential Capturing in Standard
Mode shown below, the overall number of executed vectors is
65664 = 1026 x 64.
For Sequential Capturing:
Capturing starts with the first vector and ends with the last vector
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of the main label. For each vector, the result data of each capture
pin will be captured once per capture edge. That is, at edge 1 in
Standard Mode, and at edge 1 and edge 4 in Double Mode.
You can disregard individual samples later on, when analyzing the
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captured data, by means of the vector variable which is used to
retrieve the captured data for further processing.
In the example shown below, the first 126 vectors are used to set
the device to a pre-capture state. The captured data of the
following 65536 vectors is the actual data of interest, and the last
two vectors set the device to some post-capture state.
The data captured at the first 126 and the last two vectors will
later on be ignored.
Example of Capture Vectors (Sequential Capturing, Standard Mode)
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