Product Name: |
Sarantel Geohelix SMP-Passive Antenna with GPS Module Sirf Star III chipset |
Description: |
新增網頁1
2.
SPECIFICATION
2.1. ABSOLUTE MAXIMUM RATING
|
Parameter |
Min |
Typ |
Max |
Units |
|
Power
Supply
Voltage |
3.1 |
3.3 |
3.5 |
V |
|
Operating
Current |
67 |
75 |
82 |
mA |
2.2. GEOHELIX-SMP
GPS ANTENNA CHARACTERISTICS
|
Parameter |
Min |
Typ |
Max |
Unit |
|
Frequency |
1573.42 |
1575.42 |
1577.42 |
MHz |
|
Gain |
-5.5 |
-3.5 |
|
dBic |
|
Beamwidth |
|
>120 |
|
Degrees |
|
VSWR |
|
2.0:1 |
2.3:1 |
|
|
Impedance |
|
50 |
|
Ω |
|
Operating
Temperature
Range |
-40 |
+20 |
+85 |
℃ |
2.3. GPS TECHNICAL
SPECIFICATION
|
|
ITEMS |
DESCRIPTION |
|
Chipset |
GRF3w&GSP3f |
SiRF
StarIII
technology |
|
General |
Frequency |
L1, 1575.42
MHz |
|
C/A
code |
1.023 MHz
chip rate |
|
Channels |
20 |
|
Accuracy |
Position |
10 meters,
2D RMS |
|
5 meters
2D RMS,
WAAS enabled |
|
< 5meters(50%),
DGPS corrected |
|
Velocity |
0.1
meters/second |
|
Time |
1
microsecond synchronized
to GPS time |
|
Datum |
Default |
WGS-84 |
|
Other |
selectable
for other Datum |
|
Time
to First Fix (Open Sky & Stationary
Requirements) |
Reacquisition |
0.1 sec.,
average |
|
Snap start |
1 sec.,
average |
|
Hot start |
8 sec.,
average |
|
Warm
start |
38 sec.,
average |
|
Cold
start |
42 sec.,
average |
|
Dynamic
Conditions |
Altitude |
18,000
meters (60,000
feet) max. |
|
Velocity |
515 meters/second
(1000
knots) max. |
|
Acceleration |
Less than
4g |
|
Jerk |
20
meters/second3,
max. |
|
Power |
Main power
input |
3.3 ± 5%V
DC input. |
|
Power
consumption |
Less than
250 mW (Continuous
mode) |
|
Supply Current |
≈75
mA (Continuous
mode) |
|
Backup Power |
See section
2.9 PIN DESCRIPTION Pin#7 |
|
Serial Port |
Electrical
interface |
One full
duplex serial
TTL UART
interface. |
|
Protocol
messages |
NMEA-0183@4800
bps
(Default) |
|
Timemark-1PPS
Pulse(Customization
Device) |
Level |
TTL |
|
Pulse duration |
100ms |
|
Time
reference |
At the
pulse positive edge. |
|
Measurements |
Aligned to
GPS second,
±1
microsecond |
2.4.
EXTERNAL BACKUP
POWER CONDITIONS
|
PARAMETER |
Symbol |
Min |
Typ |
Max |
Units |
|
RTC(Battery)
Power |
BATTERY |
|
2.0 |
5.0 |
V |
|
Supply Current |
|
|
15 |
|
µA |
|
|
|
|
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