7.9 How to configure of the baseline stabilization?
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Acqiris SA230E User's Manual
7.9 How to configure of the baseline stabilization?
Using the Soft Front Panel
Parameters
Mode:
defines the baseline stabilization mode.
The same baseline stabilization mode should be configured to both channels.
Pulse Polarity:
Define the pulse polarity for the baseline stabilization.
Pulse Threshold:
Define the baseline pulse detection threshold. Signed left-aligned 16-bit ADC code,
from -32768 to + 32767 LSB.
Digital Offset
: Applies a digital offset after the baseline stabilization. Signed left aligned 16-bit ADC
code, from -32768 to + 32767 LSB.
Step-by-step procedure from an example
In the following example, pulses of 10 mV amplitude are acquired at 100 kHz from a signal generator
using the external trigger.
1. Set the range and configure the offset such as the full baseline is visible in the trace.
Note that if the baseline is outside the range, the baseline stabilization may not work correctly.
In the example range = 2.5 V and
offset
t = -1.24 V.
2. Determine the pulse polarity: negative in the example.
3. Determine the pulse threshold: select the
RawData
display mode and do measurements in
Normal mode or with 1 average if using the averager mode (-AVG required). The threshold
should be placed at the limit of the baseline and the pulses, you will use 32300 LSB in the
example below.
4. Determine the digital offset: to keep the baseline at the same voltage level, set
Digital Offset
to
- offset
in ADC code.
In the example
offset
= -1.24 V, therefore digital offset should be set to 32506 LSB to keep the
baseline closed to 0 V.
