Rainbow Electronics DAB-GPS-C01 - Manual (Page 5)

LEA-5H, LEA-5S, LEA-5A - Data Sheet Preliminary u-blox proprietary
GPS.G5-MS5-07026-P4 Page 5
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1.8 Antenna
LEA-5 modules are designed for use with passive and active antennas.
An optional antenna supervisor is available with the LEA-5H, LEA-5S and LEA-5A. In the default operation mode
the antenna supervisor is activated and enables the receiver to detect short circuits to the active antenna by
checking the bias voltage level and can shut down the voltage bias immediately. A series resistor is needed in
front of the V_ANT input. UBX and NMEA messages are provided to report the condition of the antenna supply.
Open circuit detection can also be supported with an additional external circuit. For details, please refer to the
LEA-5 Hardware Integration Manual [1].
Parameter Specification
Antenna Type Passive and active antenna
Active Antenna
Recommendations
Minimum gain
Maximum noise figure
Maximum gain
15 - 20 dB (to compensate signal loss in RF cable)
1.5 dB
30 dB
Table 3: Antenna Specifications for all LEA-5 Modules
Parameter Specification
Antenna Supply Using VCC_RF or external voltage source
Antenna Supervisor
Short circuit detection
Open circuit detection
Built-in
Enabled with external circuit
Table 4: Antenna Supervisor Specifications for LEA-5H, LEA-5S and LEA-5A