Dc Power Output - Iridium 9601 Product Developer Manual

Iridium Satellite LLC
9601 SBD Transceiver Product Developers Guide
V1.24 120505
the satellites are not visible. Every time a ring search fails, the time to wait is increased by 96 frames up
to a maximum of 1344 frames, or 121 seconds.
If Network Available is currently off, the Field Application may still attempt an SBDI session. This will
force the 9601 Transceiver to look for the Ring Channel immediately, and on finding it, to attempt to send
the message. In this case Network Available will not come on immediately. The Network Available does
not turn on while in a +SBDI session. It will however turn on 4 seconds later assuming that the Ring
Channel is present. After the SBD session completes, the 9601 performs a new Ring Channel search
sequence, at the end of which Network Available gets turned on. That can take between 4 and 12
seconds.
The wait time between search windows is reset to 4 seconds every time a search succeeds. Otherwise it
continues to increase. So if the +SBDI attempt fails to find the ring channel, the search window does not
reset to 4 seconds.
Note that the behavior of +CIEV:1 is identical in to that of the Network Available output.

3.6 DC Power Output

A limited power output can be provided by the 9601 which could be used for driving an LED to provide a
visible indication that the transceiver is on, or the output could be used in application logic to determine if
the transceiver is on.
Iridium Satellite LLC Proprietary & Confidential Information
Information contained herein is subject to change without further notice
25