Tait TB8100, Руководство пользователя

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TB8100 Service Kit User’s Manual
Glossary 229
F
flag
A flag is a programming term for a “yes/no” indicator used to
represent the current status of something. The base station has a
set of system flags that are read and set by Task Manager. There
is also a separate set of flags that you can use in your own Task
Manager tasks.
frequency band
The range of frequencies that the equipment is capable of
operating on.
front panel
The cover over the front of the base station containing fans for
the PA and PMU.
G
gating
Gating is the process of opening and closing the receiver gate.
When a valid signal is received, the receiver gate opens.
H
hiccup mode Many power supplies switch off in the event of a short-circuit
and try to start again after a short time (usually after a few
seconds). This “hiccup”-type of switching off and on is repeated
until the problem is eliminated.
hysteresis
Hysteresis is the difference between the upper and lower trigger
points. For example, the receiver gate opens when the upper
trigger point is reached, but will not close until the level falls to
the lower trigger point. An adequate hysteresis prevents the
receiver gate from repeatedly opening and closing when the level
is about that of the trigger point.
Hysteresis mode
A mode of PMU operation designed to save power. The PMU
is mainly turned off, but switches back on intermittently to
maintain output voltage when the output current is low.