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Antenna Specifications Appendix C
SUPERSTAR II User Manual Rev 3 57
Table 12: Antenna Gain Depending on Cable Length Required
The +26 dB and +36 dB antenna can accept a supply voltage between 5 and 18 VDC. It is recommended to
compute the drop in the coaxial cable so the active antenna will always see the minimum operating voltage of
4.5 Volt. Table 13 lists the current taken by each of these antenna.
Table 13: Typical Current Consumption Versus Antenna Gain
C.2 Geodetic Active Antenna
For DGPS applications where <1 m accuracy is required, it is strongly recommended you use an active
geodetic GPS antenna if possible. In the event where the cable length between the receiver and the antenna is
very short (less than one meter), a passive antenna could then be considered. Table 14 lists the specifications
for recommended passive antennas. Complete drawings are at the end of this appendix.
Cable PNs ANTENNA GAIN CABLE TYPE
MAX. LENGTH
a
a. A 1 dB loss for the coaxial cable is usually required between the RG-58 cable and the GPS Receiver MCX
connector and it is included in attenuation number in parentheses. If the distance between the antenna and
the GPS receiver needs to be longer than 65 m, you should select another type of coaxial cable with a lower
loss per meter.
MIN. LENGTH
217-601730-XXX 0 dB (no LNA) RG-58 Low Loss 3 meter (3 dB) 0 feet
217-601730-XXX +12 dB RG-58 Low Loss 20 meter (12 dB) 0 feet
217-601730-XXX +36 dB RG-58 Low Loss 65 meter (36 dB) 50 meter (28 dB)
Antenna Gain Current Consumption
+12 dB 20 mA
+26 dB 35 mA
+36 dB 50 mA