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The Jupiter 31 is a 20 channel GPS receiver module based on the Jupiter 21 form factor that is significantly enhanced to take advantage of the SiRFStar III architecture. The Jupiter 31 offers a substantial increase in sensitivity, faster time to fix, lower power consumption and the option of using either an active or passive antenna.
Navman’s Jupiter 31 GPS receiver module has been designed for low power consumption in reduced signal areas at a very competitive price. The Jupiter 31 normally acquires GPS position under low signal conditions faster than other GPS engines. Tracking continues in areas of dense foliage or built-up inner city environments and even indoors greater than –159 dBm.
Using the new and highly integrated GSC3e/LP from SiRF and carefully selected key components including TCXO, LNA and Flash, the Jupiter 31 offers faster acquisition, a wider operating voltage range and greater noise rejection than leading competitors’ products using a similar architecture.
Key features:
- Popular Jupiter 21 form factor
- Low power SiRFStarIII technology
- Ultra-high sensitivity , with faster times to fix under most conditions
- 200,000 effective correlators allows for improved indoor fixes and tracking capability
- Low power consumption and power management options to Further reduce current consumption
- Integral LNA with low power control
- SiRFLoc and SiRFInstantFix multimode
- 0.5 PPM TCXO for optimal performance
- User selectable SBAS (WAAS, EGNOS and MSAS) support
- Environmentally friendly RoHS compliance
Receiver architecture
20-channel, 200 000 effective correlators, L1 1575.42 MHz
C/A code (1.023 MHz chip rate)
code-plus-carrier tracking (carrier-aided tracking)
velocity, up to 500 m/s
acceleration, up to 4 G
Tracking capability
20 satellites simultaneously
Accuracy
horizontal accuracy: 2.5 m (CEP), 5.5 m (2 dRMS)
velocity accuracy: speed <0.01 m/s; heading < 0.01°
Acquisition/reacquisition performance
@ -125 dBm
- hot start TTFF: <1s (90%), 500 ms (typ) valid almanac, time, position and ephemeris
- warm start TTFF: 36 s (90%), 31 s (typ) valid almanac, time and position
- cold start TTFF: 38 s (90%), 33 s (typ) valid almanac
Antenna input
integral LNA for use with passive antenna
active antenna powered through receiver (50 mA max at 12 VDC max)
Datums
supports selection of datums, default: WGS-84
Environmental
operating temperature: –40°C to +85°C
humidity: up to 95% non-condensing
altitude: –305 m to 18 000 m
Compliance
EMC: FCC - Part 15, class B
EN: 55022, class B
Physical
dimensions: 40.6 x 71.4 x 10.0 mm
weight: 25 g
On-board filtering
L1 –75 MHz, –30 dB
L1 +50 MHz, –20 dB
Data interfaces
- two serial ports available
- CMOS-level (3.3 VDC)
- selected NMEA-0183/SiRF binary messages: latitude, longitude, elevation, velocity, heading, time, satellite tracking status, command/control messages
- SiRF binary interface
- Electrical
- input power range: 3.0 – 0.1 / + 0.3 VDC
- battery backup current: 5 to 6 µA (typ) for 2.85 to 6.0 VDC (SRAM and RTC)
- 5 VDC power option available. Contact your Navman Distributor for more information.
Power consumption
- average sustained power (after 1st solution) <82 mW at 3 V, <95 mW @ 3.3 V
- Connectors
- data/power: 20-pin (2x10) on 2 mm centers
- RF: right angle or straight OSX, or right angle SMB
JUPITER 31接口定义：
|
J1
|
Name
|
Type
|
Description
|
|
1
|
VANT
|
P
|
external power supply for active antenna
|
|
2
|
PWRIN
|
P
|
primary VDC power input
|
|
3
|
VBATT
|
P
|
backup battery input
|
|
4
|
PWRIN
|
P
|
primary VDC power input
|
|
5
|
RESET
|
I
|
master reset (active low)
|
|
6
|
GPIO 14
|
I/O
|
reserved - no connect
|
|
7
|
GPIO 15
|
I/O
|
reserved - no connect
|
|
8
|
BOOT
|
I
|
serial boot (active low; can be held high or open circuit for normal operation)
|
|
9
|
GPIO 1
|
I/O
|
reserved - no connect
|
|
10
|
GND
|
P
|
ground
|
|
11
|
TXA
|
O
|
CMOS level asynchronous output for UART A
|
|
12
|
RXA
|
I
|
CMOS level asynchronous input for UART A
|
|
13
|
GND
|
P
|
ground
|
|
14
|
TXB
|
O
|
CMOS level asynchronous output for UART B
|
|
15
|
RXB
|
I
|
CMOS level asynchronous input for UART B
|
|
16
|
GND
|
P
|
ground
|
|
17
|
GND
|
P
|
ground
|
|
18
|
GND
|
P
|
ground
|
|
19
|
PPS
|
O
|
pulse per second output 1uS wide
|
|
20
|
WAKE-UP
|
I
|
PTF wake-up, active on positive-going edge
|
|
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