HBM GEN3i, Руководство пользователя, Страница: 134 / 1160

Figure 9.3: Run
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Storage: Sweeps only
The basic storage modes can be combined to create more advanced storage
modes:
Dual In this mode, sweeps and continuous data are stored. Therefore, the end
result is a recording that comprises the higher speed sweeps as well as the
lower speed continuous data between the sweeps.
Slow
-
Fast Sweep In this mode, sweep data with different sample rates are
stored. The difference from the dual mode is the fact that the slower data stream
is now actually a slower speed sweep, i.e. it has a predefined length and
requires a trigger. The trigger position is the same as the trigger of the first
high
-
speed sweep.
9.3.1 More on sweeps
Figure 9.1 "Simplified generic single channel data acquisition system" on
page 131 is a very simplified block diagram of the general concept of a single
channel digitizer. Once the analog values have been converted by the ADC into
binary codes, they are stored in successive order in a buffer memory, the on
-
board RAM. This memory can be divided into multiple segments to allow for the
storage of multiple sweeps.
If the last storage location of a segment is filled and acquisition is still taking
place, the first storage location is overwritten with a new sample, followed by
the second storage location, etc.
GEN3i
134 I3763-3.1 en HBM: public