Novatel 600-G - Manual (Page 2)

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 –
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