TB8100 Installation and Operation Manual Functional Description 61
© Tait Electronics Limited June 2005
Once the base station’s Power Saving Modes licence is enabled, you can use
the Service Kit to enable and configure its Sleep and Deep Sleep modes (see
the Service Kit online Help for details).
Each mode is defined by a receiver cycling time and a Tx keyup time and
the values of these parameters determine which power saving measures are
used. The transitions from Normal mode to Sleep and from Sleep to Deep
Sleep modes are initiated by an idle timer.
Normal mode needs no enabling and can be configured without a Power
Saving Modes licence. The configuration can involve no current reduction
at all (no receiver cycling and the fastest possible Tx Keyup time), or a
modest reduction to give similar performance to the T800.
The transitions between modes are shown in Figure 4.8. On startup, the
base station operates in Normal mode. A timer starts as soon as there is no
channel activity. PTT, front-panel carrier-only transmission, CWID bursts,
and alarm tones do not count as activity, and can all occur in Sleep and Deep
Sleep modes without affecting the timer.
When the timer reaches the value set in the Service Kit (in the ‘Start after’
box) for Sleep mode, the base station enters Sleep mode. If the receiver
Figure 4.8 Transitions between sleep modes
Normal Mode
User-selected Rx cycling time
and Tx keyup time
Deep Sleep Mode
User-selected Rx cycling time.
Tx keyup time Slow
Tx Key is activated or receiver
detects activity and determines
that the signal is valid
Idle timer continues until it
reaches the Deep Sleep value
Idle timer reaches Sleep
mode value
Tx Key is activated or receiver
detects activity and determines
that the signal is valid
Sleep Mode
User-selected Rx cycling time.
Tx keyup time Medium
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