Apogee Series
– Hardware Manual
APOGEEHM.1.5
4.5.2. Electrical specifications
Recommended electrical specifications for GNSS antenna selection from -40°C to 71°C.
Parameter
Specifications
Remark, conditions
Antenna connector
TNC female
IP-68 when connected
Input impedance
50 Ω
LNA supply voltage
5 VDC
±5%
LNA supply current
< 200 mA
Per antenna
RF input frequencies
L-Band
GPS/GLO L1
GPS L5/GLO E5a
GPS L2/GLO L2/ GLA E5b
1525 - 1559 MHz
1565 - 1610 MHz
1160 - 1196 MHz
1217 - 1252 MHz
Recommended Gain
15 dB to 50 dB
Antenna gain minus cable losses
Note: If you use an amplified antenna splitter or special GNSS antennas such as a Trimble Zephyr 2,
please make sure that the actual gain at the Apogee side isn't above 50 dB.
4.5.3. GPS antenna advice
The Apogee-D embed a high performance multi-constellation GNSS receiver that supports L1/L2/L5 as well
as L-Band signals. For best performances and robustness, please use low noise and high gain active GPS
antennas that support the frequencies band you are planning to use.
In addition, the Apogee D requires at least an L1/L2 GPS + GLONASS antennas to compute correct true
heading solutions.
Don't forget to also check the GPS antenna LNA power requirements such as input voltage (must accepts 5
VDC) and input current (must be below 200 mA per antenna).
SBG Systems has selected some high quality GPS antennas for different applications. Please refer to the
support center to get more details on available antennas.
Note: As a rule of thumb, true heading and/or RTK measurements require higher quality GPS
antennas to achieve the stated accuracy.
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