Keysight M9502A, Руководство пользователя

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Keysight M9502A/M9505A AXIe Chassis User Guide 89
MultiFrame Operation Features and Functions
MultiFrame Operation
MultiFrame is a Keysight feature by which multiple measurement instruments in
two or more chassis can be interconnected to appear as one integral instrument
to the user. It includes hardware, software, and cabling specifications.
In practice, the potential combinations of instruments which can share
synchronization and triggering are numerous, and there is no practical limit on
the number of chassis which you may interconnect. This section introduces basic
MultiFrame connection and features, based on a simple MultiFrame of three
M9505A chassis.
Use When:
Use MultiFrame to increase the number of measurement modules
which utilize a common time base or cross triggering to achieve correlation. The
MultiFrame cables extend trigger and timing features to instruments not
connected to the master chassis’s backplane.
Shared Features
All chassis (therefore all installed instruments) in the MultiFrame can share:
Clock Source
A common 100 MHz clock is sourced from the master chassis.
The time offset for clock signals to traverse the cable and signal path between
each pair of chassis is about 35 ns. The MultiFrame design calibrates this out,
within about 600 ps of error.
Cross Synchronization
A common SYNC signal is sourced from the master
chassis. The time offset for SYNC to traverse the cable and signal path between
each pair of chassis is about 35 ns. The MultiFrame design calibrates this out,
within about 600 ps of error.
Cross Triggering
Any instrument in the MultiFrame can source or receive a
trigger, using any of the four Flag signals carried between chassis using the
MultiFrame cables.
MultiFrame operation is a Keysight feature, not an AXIe specification. Cables may
be hot plugged.
MultiFrame operation is different from multiple chassis
operation; see “How does a multiple chassis system differ from a MultiFrame
system?” on page 42 for more information.
MultiFrame cables (such as the Y1223A and 1224A) can be hot plugged; that is,
you do not need to cycle chassis power when connecting multiple chassis. The
slave chassis detects the presence of the MultiFrame cable and automatically
switches its clock source to the master chassis’ clock output from the MultiFrame
cable.