The Process Starts With Data Collection - HP 54710A User's Reference Manual

Measurements

The Process Starts With Data Collection

The Process Starts With Data Collection
In order to make measurements on a signal, the instrument must first collect
data about that signal. In the case of a live signal being measured from the
front panel, the measurement process begins as soon as any data is available.
In contrast, measurements being made over the bus require that a test be
performed before the measurement process is started to ensure that the
amount of data in the record meets a completion criterion. By default, 90
percent of the data must be acquired before the measurement process starts
as shown in figure 13-3. This feature keeps an interrupt over the bus from
stopping the data collection before enough data has been collected to make
accurate measurements. The completion criterion for measurements over
the bus can be controlled using the completion criterion command
ACQUIRE:COMPLETE.
The data record used for making measurements on waveform memories is
the stored data. Finally, measurements being made on functions require that
the function be calculated before the measurement process is started.
Figure 13–3
Measurements over the bus need a specified completion percentage
13–4