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equivalent mount. Attach coaxial cable from the antenna connector to the antenna port on
your receiver.
Caution: Over tightening the metal adaptor into the plastic baseplate will damage
the baseplate.
The maximum directivity at 90° elevation angle (antenna boresight) is typically 8 to 10
Decibels (dB). This is on average 5 dB more than a typical patch antenna. In addition
the pattern roll-off from boresight to antenna horizon (0° elevation angle) is in the order
of 15 to 20 dB. This roll-off compares well to a patch antenna roll-off mounted on a
large choke ring ground plane. This antenna has a major advantage above the choke ring
ground plane antenna – it is lighter by several pounds and much smaller.
There is no difference in phase center location between the L1 and L2 channels. This is a
very important feature of the antenna. Base stations with very long GPS baselines
normally use a choke ring type antenna that has a physical vertical offset (z-axis) between
the L1 and L2 channels in the order of 20 mm. The vertical phase center offset then has
to be corrected because the choke ring antenna sees a different GPS/GLONASS satellite
constellation. The GPS-600-G then is very suitable for long baseline applications such as
tectonic plate movement monitoring or telescope alignment. The phase center in the x
and y-axis is located in the center of the antenna for all four channels due to its inherent
symmetry and co-centric type design.
– ELECTRICAL TECHNICAL SPECIFICATIONS –
GPS GLONASS
3 dB pass L1:
band: L2:
1575 ± 8 MHz
1228 ± 10 MHz
1602 ± 7 MHz
1246 ± 6 MHz
Out-of-band
rejection:
f
c
(L1)-50 MHz: 15 dB; +50: 10
f
c
(L1)-100 MHz: 40 dB; +100: 30
f
c
(L2)-50 MHz: 25 dB; +50: 20
f
c
(L2)-100 MHz: 45 dB; +100: 45
f
c
(L1)-50 MHz: 5 dB; +50: 15
f
c
(L1)-100 MHz: 25 dB; +100: 45
f
c
(L2)-50 MHz: 5 dB; +50: 25
f
c
(L2)-100 MHz: 30 dB; +100: 50
LNA gain: L1:
L2:
28 ± 3 dB
31 ± 3 dB
24 ± 3 dB
28 ± 3 dB
Antenna elev. pattern: θ = 90°: 7.5 dBic (L1 min.), 6.5 dBic (L2 min.)
(90° = zenith) 20° ≤ θ < 90°: -1.5 dBic (L1 min.), -1.5 dBic (L2 min.)
5° ≤ θ < 20°: -5.5 dBic (L1 min.), -3.5 dBic (L2 min.)
0° ≤ θ < 5°: -7.0 dBic (L1 min.), -5.0 dBic (L2 min.)
Polarization: Right-hand circular
Noise figure: ≤ 2.0 dB (typical)
Differential propagation delay: 1.5 nsec (typical)
Axial ratio (90° = zenith): 0° ≤ θ ≤ 90°: 5 dB max. (L1), 3 dB max. (L2)
Nominal impedance: 50 Ω
VSWR: ≤ 2.0:1
Power requirements: ≤ 50 mA @ +4 to +18 VDC, 40 mA (typical) @ 5VDC
Power handling: ≤ 0.5 W
– MECHANICAL & ENVIRONMENTAL SPECIFICATIONS –
Finish: Weatherable polymer
Weight:
≈ 730 g (25.75 oz)
Altitude: 3000 m (9842.5 ft)
Temperature:
-55 °C to +85 °C (-67 °F to +185 °F)
– MECHANICAL DRAWINGS –
H/W Rev: A
P/N: xxxxxxxx
MADE IN CAN ADA
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