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USING THE COMBISCOPE INSTRUMENTS 3 - 29
3.4.2 Reading trace acquisitions
Once acquisitions are completed, the resulting traces ares placed in TRACe
memory, as shown in the following figure.
The last acquired trace at input channel 1 is placed in the TRACe memory
element named CH1. The trace acquired at channel 2 in CH2, etc. This trace data
can be read by using the TRACe[:DATA]? query.
Example:
TRACe? CH2 Returns the trace that was last acquired at input channel 2.
When new acquisitions are executed, the previously stored traces are not
automatically saved, but overwritten by the new result. When these traces need
to be saved, they have to be copied into other TRACe memory elements, before
a new acquisition is initiated. Refer to section 3.10.2 "Copying traces to memory"
for a description about how to copy traces.
As response to the TRACe? query the data is returned as block data.
Section 3.4.3 "Conversion of trace data" specifies the coding of this data and
describes how to convert this data into voltage values.
INPut[1]
INPut
@1
@2
INPut2
INPut3
@3
INPut4
@4
:VOLTage[1]
:VOLTage2
:VOLTage3
:VOLTage4
:SWEep
Main Time Base
ST7160
SENSe
TRACe
CH 1
CH 2
CH 3
CH 4
memory
Figure 3.10 The trace acquisition flow