Приемника в составе модуля нету.
Этот разъем GPS, повторяю, просто коммутируемый вывод с антенны. Во время передачи сигнал отключается. Во время приема - не помню...
Во время "спящего состояния" - сигнал на выводе GPS присутствует.
Вообще, посмотрите файлик Iridium 9602 SBD Transceiver Product Developers Guide.pdf - там все подробно разрисовано!
У меня версия 6.0 - это страница 29.
Звониться не будет, там конденсатор в цепи стоит.
4.3 GPS Connector
The second RF connector, labeled “GPS” in the board silkscreen, is a pass-through connection from the antenna path and is provided for GPS receivers that wish to share the main antenna. An overview of this circuit is provided in Figure 7. The following operational points should be noted when using GPS receivers connected to this point.
o The GPS pass-through path is activated by detecting the presence of a DC voltage on the center-pin of the GPS connector. The 9602 uses the voltage from the GPS center pin to switch on the RX path and requires minimal current (<100uA). The GPS path activated when this center-pin voltage is higher than 1.2V.
o There is a path loss of approximately 3dB in the receive direction from ANT to GPS.
o The GPS receive path is temporarily switched off during transmissions from the 9602.
o As long as the 5V supply to the 9602 is connected and the DC voltage on the GPS connector is present, the GPS pass-through path is made available. The GPS path is available even when the 9602 module has been turned off using its ON/OFF control signal.
o If the GPS port is not used it may be left un-terminated with no adverse affect.
o The GPS receiver must present 50 ohm impedance across the Iridium band or SBD performance could be degraded.
o The output return loss is typically -8 dB.
Figure 7:
Equivalent circuit for GPS connection when GPS path is active and 9602 is not transmitting
Спутниковый модем Iridium 9602 - как считать GPS?, как считать поле $GPGGA
Jun 30 2014, 06:37
