05 | Keysight | N8834A MultiScope Application - Data Sheet
Calibration Methods
There are three calibration methods available with the N8834A
MultiScope software. Each calibration method provides a
different level of channel-to-channel skew value. Manual
calibration is available for users who are interested in viewing
multi-channel signals but not concerned about the skew factor
across channels. External trigger helps users achieve 100 ps
channel-to-channel skew. The most accurate measurements can
be achieved with the drift correction method with skew in the
range of 200 fs.
3. Precision
The horizontal position of channels within different oscilloscope
frames can drift with temperature (inter-oscilloscope drift). The
drift correction synchronization process corrects for this drift by
monitoring the inter-oscilloscope drift on a separate, dedicated
synchronization channel. The idea is that any “time corrections”
that keep the synchronization channels aligned will also keep
the signals aligned. Precision calibration will consume one of the
channels on each oscilloscope and is only available on 90000 X-,
90000 Q-, V-Series, and Z-Series oscilloscopes. On the Infiniium
90000 X- and V-Series, a maximum of two oscilloscopes can
be connected to perform precision calibration. A sync port is
available for precision calibration on 90000 Q- and Z-Series.
1. Manual
Manual calibration requires no cabling and users can achieve
skew correction by manually dialing in the right skew values
between the channels. InfiniiVision scopes supports only manual
calibration.
2. Basic
The trigger out process provides the most basic level of inter-
oscilloscope time synchronization. This process connects the
trigger output signal (Trig Out) from the leader oscilloscope
through each follower oscilloscope (Aux Trig) in a daisy chain
configuration. The followers are each armed in descending order
from furthest from the leader (F{N}) to nearest to the leader (F{1}).
The leader’s trigger is armed last. Once the leader triggers, each
follower will trigger in turn, down through the chain.
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