Electrical Specifications
Mechanical and Environmental Specifications
Elevation Gain Patterns
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POINT, Inc. - Advanced Measurements Solutions from Sokkia and NovAtel
Sokkia L1/L2 GPSAntenna™
Model SK-600
- User Information -
Introduction
The performance of the model SK-600 can be summarized as follows:
• Very good sensitivity to signals over a wide range of elevations and
in all azimuth directions
• Excellent pattern roll-off near the horizon (eliminating multipath-
generated replicas of the original line-of-sight signal)
• Very good axial ratio (ensures a high quality signal is received)
• Common location and stable phase center for both L1 and L2
channels
• Enhanced immunity against electromagnetic interference
• Better radiation “hardening” from lightening or EMP
(electromagnetic pulse) effects
• High-speed transient voltage suppressor
• Operational temperature range from cold to hot extremes
3 dB pass band:
L1: 1575 ± 8 MHz
L2: 1228 ± 10 MHz
Out-of-band rejection:
f
c
± 30 MHz:
25 (min.)
f
c
± 50 MHz:
30 (min.)
f
c
± 100 MHz:
50 (min.)
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.)
LNA gain:
26 ± 3 dB (L1) 26 ± 3 dB (L2)
Polarization:
Right-hand circular
Noise figure:
≤
1.5 dB (typical)
L1-L2 differential propagation
delay:
1.5 nsec (typical)
Axial ratio:
0
°
≤
θ
≤
90
°
:
5 dB max. (L1), 3 dB max. (L2)
(90
°
= zenith)
Nominal impedance:
50
Ω
VSWR:
≤
2.0:1
Power requirements:
≤
50 mA @ +4 to +18 VDC, 40 mA (typical) @ 5 VDC
Power handling:
≤
1 W
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)
0
30
60
90
120
150
180
210
240
270
300
330
RHP
Angle
5
−
10
−
15
−
20
−
25
−
30
−
35
−
40
−
0
30
60
90
120
150
180
210
240
270
300
330
RHP
Angle
5
−
10
−
15
−
20
−
25
−
30
−
35
−
40
−
