TB8100 Installation and Operation Manual Functional Description 63
© Tait Electronics Limited June 2005
Further
Considerations
■ Hysteresis mode is only available if a standby power supply card is fitted
and the auxiliary power output has not been turned on by Task Manager
action.
■ Auxiliary power is not available in Sleep or Deep Sleep modes.
■ There may be a significant delay in the setting of digital outputs if
PWR_ON is cycling. A change, such as the state of a digital input, is
only read when the power cycles on. Task Manager carries out the action
to set the digital output while the power is off, but this action only takes
effect next time the power cycles on.
■ During receiver cycling, the base station is unable to provide a
continuous output on its audio output lines. When the receiver cycles
off, so does its line output, even if the outputs are not gated.
4.8.4 Using the Service Kit with Power Save Base Stations
You can connect the Service Kit to a base station in Sleep or Deep Sleep
mode and log on. The reciter is still able to communicate with the Service
Kit when powered by the standby power supply card. The control panel
needs to wake up, but the rest of the base station does not change mode. The
reciter can also initiate communications via the control panel to an Alarm
Center.
You can use the Service Kit to monitor Power Save operation and see what
power saving measures are currently active.
Important Displaying any PA monitoring or diagnostic screen turns
the PA on. The PA stays on until the screen is closed. Make
sure that you do not waste power by leaving any of these
screens on.
Table 4.4 Power Saving measures selected by Tx keyup time
Power
Saving
Mode
Tx Keyup
Time
PMU PA
28V Power Fast key
Normal 2ms
ab
a. The Tx Keyup time you select using the Service Kit refers to the amount of time need-
ed to key the transmitter AFTER the reciter detects valid RF or receives a Tx Key signal.
The total time needed is increased by receiver cycling and varies according to where
in the cycle the RF or Tx Key is applied. The reciter only looks for RF or Tx Key when
the PWD_RX rail is on.
b. The actual Tx Keyup time may be slightly shorter or longer than this value. Refer to
the TB8100 Specifications Manual for further details.
on enabled
5ms
a
on disabled
20ms
a
on disabled
Sleep Medium Hysteresis mode disabled
Deep Sleep Slow off n/a: PA is off
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