General Description
The ZX4125WP is a high sensitivity; WAAS
enable GPS module designed for a broad spectrum of OEM applications.
This product is based on the proven technology found in other Wondeproud
16-channel GPS receivers. The GPS module receiver will track up to
16 satellites at a time while providing fast time-to-first-fix and
1Hz navigation updates. Its far-reaching capability meets the sensitivity
& accuracy requirements of car navigation as well as other location-based
applications, such as AVL system. Handheld navigator, PDA, pocket
PC, or any battery operated navigation system.
The ZX4125WP design utilizes the latest surface mount technology and
high level circuit integration to achieve superior performance while
minimizing dimension and power consumption. This hardware capability
combined with software intelligence makes the board easy to be integrated
and used in all kinds of navigation applications or products. The
module communicates with application system via RS232 (TTL level)
with NMEA0183 protocol. |
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Features
Built-in high performance NEMERIX chipset
Average Cold Start in 45 seconds
Ultra Low power consumption
16 channels "All-in-View" tracking
On chip 4Mb flash memory
TTL level serial port for GPS receiver command
message Interface
Compact Board Size for easy integration into hand-held
device.
Support Standard NMEA-0183 V3.0
Option Accurate 1PPS Output Signal Aligned with
GPS Timing
Multi-path Mitigation Hardware
Optimum clock drift adjustment
External antenna open/short detector
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Specification
| Electrical Characteristics |
| General |
| Frequency |
L1, 1575.42 MHz |
| C/A code |
1.023 MHz chip rate |
| Channels |
16 |
| |
| Sensitivity |
| Tracking |
-152dBm typical |
| Acquisition |
-140dBm typical |
| |
| Accuracy |
| Position |
7 meters CEP (90%) horizontal,
SA off |
| Velocity |
0.1 meters/second |
| Time |
1 microsecond synchronized to GPS
time |
| |
| Datum |
| Default |
WGS-84 |
| Other |
Support different datum by request |
| |
| Acquisition Rate
(Open sky, stationary requirements) |
| Hot start |
6 sec, average |
| Warm start |
38 sec, average |
| Cold start |
45 sec, average |
| |
| Dynamic Conditions |
| Altitude |
10,000 meters max |
| Horizontal Velocity |
300 kilometers/hour max |
| Vertical Velocity |
36 kilometers/hour max |
| Acceleration |
2g, max |
| Jerk |
4 meters/second3, max |
| |
| Power |
| Main power input |
3.3 ±5% VDC input. |
| Supply Current |
ZX4120 27mA@3.3V (Continuous mode)
ZX4125P 33mA @ 3.3V (Continuous mode) including LNA |
| |
| Serial Port |
| Electrical interface |
one full duplex serial communication,
TTL interface |
| Protocol message |
NMEA-0183, version 3.0 optional |
| Default NMEA |
GGA, GSA, GSV, RMC and VTC. 9600
baud rate, 8 bits data, 1 start, 1 stop, no parity. |
|
(GSA & GSV is 3sec output
1msg, option baud rate: 4800,19200, 38400)
|
| |
| Time-1PPS Pulse
(optional) |
| Level |
TTL |
| Pulse duration |
100ms |
| Time reference |
at the pulse positive edge |
| Measurements |
Aligned to GPS second, +/-1 microsecond |
| |
| Recommended External
Antenna Specification |
| Gain |
20dB (including cable loss) |
| Noise figure |
1.5dB |
| Current |
3 ~ 30mA |
| Operate Voltage |
2.5 ~ 2.8V |
| |
| Environmental Characteristics |
| Operating temperature range |
-40°C to +80°C |
| Storage temperature range |
-55°C to +100°C |
|
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