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Leadtek's new generation LR9551 of products utilizes SiRFstarV ™ and feature Quad-GNSS for tracking GPS, GLONASS, BDS and Galileo satellites. The product family delivers highly accurate continuous location, advanced power management and high interference immunity. These continue to push the envelope of performance in sensitivity, TTFF and urban canyon availability and accuracy. With a built-in DSP and extremely low power consumption, the family can get fast location fixes for geo-tagging images or videos, asset tracking and wearable applications.
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Features/Performance
- GPS, GLONASS, Galileo, BDS and SBAS reception for high GNSS availability and accuracy
- High sensitivity navigation engine (PVT) tracks as low as
− GPS : -165 dBm
− GLONASS : -161 dBm
- 52 track verification channels
- SBAS (WAAS, EGNOS, QZSS, MSAS, GAGAN)
- Active Jammer Remover, removes in-band jammers up to 80 dB-Hz
- Tracks up to 8 CW jammers
- Multimode A-GPS (Autonomous, MS-Based, and MS-Assisted), need operator support.
- Embedded CGEE / SGEE (With back-end server support) speed up TTFF a lot and makes cold start time to be around 20+ seconds.
- SiRFGeoRecovTM Reverse EE makes positioning process being done under power saving mode.
- Reacquisition Time : 0.1 second
- RF Metal Shield for best performance in noisy environments
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Features/Hardware and Software
- Based on the high performance features of SiRFstarV™ low power single core logic.
- Adaptive micropower controller
- Only 50 to 500μA maintains hot start capability (core logic)
- <10mW required for TricklePower™ mode
- RoHS compliant (lead-free)
- Advanced navigation features
- External interrupt input for context change detection
Specification
| Feature |
Item |
Description |
| Chipset |
GSD5e/ROM Base |
SiRFstarV™ low power single chipset |
| General |
Frequency GPS |
L1, 1575.42 MHz |
| Frequency GLONASS |
L1,1602~1615MHz |
| C/A code |
1.023 MHz chip rate |
| Channels |
52 |
| Sensitivity GPSSensitivity GPS |
-165dB |
| Sensitivity GLONASS |
-161dB |
| Accuracy |
Position |
< 2.5 meters |
| Velocity |
0.01 meters/second |
| Time |
1 uS synchronized to GPS time |
| Datum |
Default |
WGS-84 |
| Other |
selectable for other Datum |
TTFF
(@ -130dBm) |
Reacquisition |
0.1 sec., average |
| Snap start |
1 sec., average |
| Hot Start |
< 2 sec. |
| Warm start |
< 20 sec. |
| Cold start |
< 30 sec. |
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Dynamic Conditions
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Altitude |
18,000 meters (60,000 feet) max. |
| Velocity |
515 meters/second (1000 knots) max. |
| Acceleration |
4g, max. |
| Jerk |
20 meters/second3, max. |
| Power |
Main power input |
5 VDC input |
| Power Consumption |
Average: 60mA (Tracking Mode) |
| Backup Power (VSTBY) |
3.3V DC battery input |
| Serial Port |
Electrical interface |
Default RS232/UART/USB |
| Protocol messages |
NMEA-0183@9600bps |
| Device Size |
42.3 x 40 x 14.1 mm |
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