Справочник Пользователя для Iridium Satellite LLC 9603
Iridium 9603 SBD Transceiver Product Developers Guide
Revision 1.0
Proprietary & Confidential Information
Distribution of guide restricted to product developers only • Information contained in this guide is subject to change without notice.
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3.2.1
Power On/Off Control
An external on/off input is provided on a pin of the User connector. The 9603 starts up when power is applied and the power on/off
input is high. As long as the input voltage is applied, logic high on this line turns the transceiver on and a logic low turns it off. If this
line is not required then it must be connected directly to the +5 V supply.
Note that this on/off control is similar to the Iridium 9601 and 9602 products, but it is not the same as the 9522, 9522A or 9522B
products.
Prior to turning of
input is high. As long as the input voltage is applied, logic high on this line turns the transceiver on and a logic low turns it off. If this
line is not required then it must be connected directly to the +5 V supply.
Note that this on/off control is similar to the Iridium 9601 and 9602 products, but it is not the same as the 9522, 9522A or 9522B
products.
Prior to turning of
f the modem a “flush memory” (AT*F) command should be issued to ensure all memory write activity is
completed. When a transceiver has been turned off, Product Developers should not reapply power on a unit until more than 2
seconds has elapsed after power has reached 0V. Additionally, if a unit does not respond to AT commands, power off the module,
wait for 2 seconds and then power it back on.
When a 9603 is powered off the power on reset circuit requires 2 seconds for voltages to decay. If the 2 second wait time is not
adhered to the reset circuit may not operate and the modem could be placed in a non-operational state. The state is not
permanent and can be rectified by the above procedure.
seconds has elapsed after power has reached 0V. Additionally, if a unit does not respond to AT commands, power off the module,
wait for 2 seconds and then power it back on.
When a 9603 is powered off the power on reset circuit requires 2 seconds for voltages to decay. If the 2 second wait time is not
adhered to the reset circuit may not operate and the modem could be placed in a non-operational state. The state is not
permanent and can be rectified by the above procedure.
3.2.2
Typical Power Usage Profile
This section is designed to give the Product Developer some insight to the electrical power profile that the 9603 uses. It does not
describe every situation and permutation possible. It should be used as a starting point for the Product Developer to continue its
own development design. The actual usage profile can vary for a number of reasons:
describe every situation and permutation possible. It should be used as a starting point for the Product Developer to continue its
own development design. The actual usage profile can vary for a number of reasons:
1) View of the sky
– if in poor visibility of the sky where a clear line of sight is not available between the transceiver and the
satellite.
2) The higher the antenna VSWR the higher the current consumed
3) How often the 9603 module is activated/deactivated by the Host Controller system
4) Manufacturing variation from transceiver to transceiver.
3) How often the 9603 module is activated/deactivated by the Host Controller system
4) Manufacturing variation from transceiver to transceiver.
The host system designer should ensure their design covers for worst case power consumption scenarios.