FEATURES AND OPERATION
2-14
Part No. 001-4090-101/102
2.7 LOW POWER OPERATION
To accommodate users, who operate sites with limited available power, Integra-H offers the
following power saving features:
l
Reduced transmit power
l
Suspend mode
l
Sleep mode
2.7.1 REDUCED TRANSMIT POWER
The Integra-H transmitter is type-approved for power levels varying from .1 to 1 Watt. Select the
desired power setting using the Integra RSS.
2.7.2 SUSPEND MODE
Note: As long as the RTS is asserted (on any port), the unit will be kept awake.
2.7.2.1 Remote Station
Remote stations remain in “low power consumption mode” (< 20 mA) waking up
periodically for about 100 ms to check the presence of a carrier. If a carrier is present, the
unit will remain awake for a period set by the
Activity timeout
. At the end of that time, if a
carrier is present or if data has been decoded, the
Activity timeout
is restarted. If there is no
carrier or no data was decoded, the unit goes into “low power consumption mode” for the
duration of the
Suspend period
. The
Suspend period
can be set via the RSS to any value
between 50 to 12000 ms in 50 ms steps. Setting a value of 0 disables the Suspend mode. The
Activity timeout
can be set via the RSS to any value between 1 and 255 seconds.
The same
Activity timeout
and
Suspend period
values must be set for both master and remote
stations.
2.7.2.2 Master Station
Master stations always remain awake. To make sure those suspended remotes have time to
wake up for outbound master data transmission, the master unit will automatically extend its
start-of-transmission synchronization time to slightly exceed that of the remote stations'
Suspend period
. This is done only for the first transmission. If the subsequent master
transmissions begin within the
Activity timeout
setting, it will then begin with a normal start-
of-transmission synchronization time.
If the delay between master transmissions is more than the
Activity timeout
, the next
transmission will be extended.
