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REB-1722 Operational Manual
(4)
RF_IN:
Connecting to the antenna has to be routed on the PCB. The transmission line must
to controlled impedance to connect RF_IN to the antenna or antenna connector of
your choice. (Impedance 50
Ω
)
(5)
Power:
Connect VCC pin to DC+3.0~3.6V. The power supply must add bypassing capacitor
(10uF and 0.1uF).It can reduce the Noise from power supply and increase power
stability.
(6)
Active antenna bias voltage:
The VCC_RF pin (pin 18) is provided voltage 2.85V. If you use active antenna, you
can connect this pin to V_ANT pin (pin 19) to provide bias voltage of active
antenna. The bias voltage will be through GPS_RF_IN pin to provide active antenna
bias voltage from VCC_RF pin.
If your bias voltage of active antenna isn’t 2.85V, you can input bias voltage to
V_ANT pin (pin 19) and input bias voltage of you need. The input bias voltage will
through GPS_RF_IN pin to provide active antenna bias voltage from V_ANT pin.
PS:
(1)
The maximum power consumption of active antenna is about 85mW.
(2)
The input gain ranges are 19~ 27dB.
