CALAMP WIRELESS NETWORKS INC. MCUB5R Manual Do Utilizador

 

To accommodate users, who operate sites with
limited available power, Integra-TR offers the
following power saving features:

1.  Reduced transmit power
2.  Suspend mode
3.  Sleep mode

 

Integra-TR’s transmitter is type-approved for
power levels less than 5 watts. Simply select the
desired power setting using the Integra RSS.
Reducing transmitter output power from 5 watts
to 1 watt will reduce maximum current con-
sumption by approximately 0.5A to 1.0 A de-
pending on radio model.

Note: as long as the RTS is asserted (on any
port), the unit will be kept awake.

 

In Suspend mode, remote stations remain in
“low power consumption mode” (nominal 7
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 of time 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 re-
mote stations.

 

 

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 pe-
riod. 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 syn-
chronization time.

 

If the delay between master transmissions is
more than the Activity timeout, the next trans-
mission will be extended.

In this mode, the unit is always in low power
consumption (nominal 7 mA). Only asserting
RTS on the COM or the SETUP ports can wake-
up the unit. When the unit is sleeping, it cannot
detect the presence of a carrier. This mode can
be selected from the RSS.

The unit will be ready to receive a carrier and
decode data within 45 to 65 ms (depending on
radio model and temperature) after wake-up.

A Remote Terminal Unit (RTU) connected at an
Integra-TR (configured as remote) can be awak-
ened by raising either RTS inputs.

DOX mode: either COM or SETUP ports RTS
can be used for wake-up. Data from DTE cannot
wake-up the unit.

RTS mode: the SETUP port RTS can be used
for wake-up without causing transmission.

 

Integra-TR is equipped with a 30-second trans-
mitter timeout (Tx Timeout) designed to protect
both Integra-TR itself and the network in case a
transmitter becomes “stuck” on the air.

 

Should this happen with a remote station, the
master would be unable to hear some or all of
the other remote stations (depending on relative