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4-16
Waking up a Compact Modem
The Teledyne Benthos Compact Modems function the same as all the other
Teledyne Benthos manufactured acoustic telemetry modems, including
SMART releases and SMART modems. However, because the Compact
Modems are designed for long deployment, they are in a low power state
most of the time. While in this low power state, a Compact Modem will not be
able to receive commands or to transmit messages. The modem must be
awakened first before it can perform these functions.
The UDB-9000 can be used to wake up Compact Modems by transmitting a
wakeup signal. Although a Compact Modem is in its low power state most of
the time, it will periodically listen for this signal. The time between which a
Compact Modem listens for the wakeup signal is the wakeup period and is
preset by the user for each Compact Modem. The wakeup period must first
be selected before the deck box can be used to wake up a Compact Modem.
Selecting the Wakeup Period for a
Compact Modem
To select the wakeup period:
1. Touch the Modem Address control
on the Status and Control bar, or
touch the Modem Config function
button.
The Modem Config screen opens.
2. Determine the wakeup period
setting for the Compact Modem.
3. Select the wakeup period from the
Compact Modem Wakeup Period
drop-down list as shown in
Figure 4-19.
When the UDB-9000 is used to
transmit a wakeup signal, the
duration of the transmission sequence will be automatically set such that
it will be present when the Compact Modem listens for it. The longer the
wakeup period, the longer sequence.
User's Manual
TELEDYNE BENTHOS
Figure 4-19 Modem Config
Screen—Wakeup Period
Selected
P/N M-270-10, Rev. B
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