Specifications

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Chapter 8: Theory of Operation
The 16740/41/42A logic analyzer as an expander
The logic analyzers can be connected together in multi-card master/expander
configuration. All of the functions of the logic analyzer configured as a master are
retained by the logic analyzer configured as an expander with a few exceptions.
As a master and expander multi-card logic analyzer module, most of the
supporting circuitry on the expander configured card is disabled to allow both
the master and expander cards to operate together as one module with no
compromise in functionality in 136-, 204-, 272-, or 340-channel configurations.
The same signals that drive the acquisition ICs on the master configured card also
drive the acquisition ICs on the expander configured card.
Acquisition. The four clocks sent to the master card are also sent to the
acquisition ICs on all expander cards. The acquisition ICs on the expander cards
individually generate their own sample clock for the state acquisition mode. For
timing acquisition mode, the master card also passes the synchronization signal
to the expander cards.
The four clock/data lines on expander card pods are not available for either state
mode clocking or state clock qualification. However, the four clock/data lines are
still available as data channels.