CXR 54500-16, Руководство пользователя

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Larus 80-100-400
Issue 1, July 2006
A-
2
ert) to tracking the primary
signal unless the secondary input fails and it is forced to.
e output driver cards will
switch to use either Input 1 or Input 2 as a timing reference.
. In both architectures, during normal operation:
•
tances, both cards will monitor the same type of input (primary or
secondary).
•
The track and hold card selected for output tracks its monitored input.
•
ks the output of the other
track and hold card for phase alignment purposes.
•
nd hold card will
switch to monitoring its other input (primary or secondary).
•
nputs are no longer good, the track and hold
card will go into a HOLD state.
•
inputs become good within 10 seconds, the primary input
will be monitored.
MHz Input 1 as its primary input and is the active source being used by the output
cards. If there is a failure of Input 1, Input Track and Hold A goes into holdover mode
and checks whether the secondary input signal is good. If it is, Input Track and Hold A
switches to track the secondary input. Subsequently, if the primary input returns and is
good, the Input Track and Hold A will not switch back (rev
In either case, the better input track and hold assembly will drive the output driver
cards. If the active assembly stops the output of timing pulses or goes into holdover
mode, the output driver cards will switch to use the other assembly as a timing
reference. If both input assemblies cease to produce pulses, th
4
Each track and hold card monitors either its primary or secondary input. Under
most circums
The track and hold card not selected for output trac
If its currently monitored input is no longer good, a track a
If both primary and secondary i
If at least one of the inputs becomes good, the track and hold card will exit the
HOLD state. If both