Navman jupiter la000605d 用户手册

LA000605D © 2007 Navman New Zealand. All rights reserved. Proprietary information and specifications subject to change without notice.

The purpose of this feature is to provide some typical application profiles which users can 

select through a simple NMEA message. These profiles are macro-like commands that modify 

parameters used for common applications. These profiles produce optimal navigation default 

settings which conform specifically to an application’s requirements. They can be then be saved 

using the Write-to-Flash feature. The new profile will not be written to Flash automatically. 
Available Profiles include:

Default - A general profile that balances the needs of most applications.
Automotive - Takes into consideration higher velocities with occasional stopping.
Pedestrian - Takes into consideration slower velocities.
TricklePower - Power saving mode for battery applications. See Low Power Operating 

Modes Application Note LA000513
Push to Fix - Only performs a fix when requested. For use in special applications. See Low 

Power Operating Modes Application Note LA000513

The profiles will be selected by an NMEA command 

$PSRF197,n<cr><lf>

where n is the profile number: 

1. Automotive 
2. Pedestrian 
3. TricklePower
4. Push to Fix 

Refer to Application Note LA000266.

The GPS fix output is an active low output on pin 23 of the module. Whenever the unit has either 

a 2D or a 3D fix, this output will be low. When the unit has no fix, the output will be high. 

The module provides custom modification of the firmware to use available CPU processing 

capacities and I/O capabilities. The custom application software can be invoked internally or 

externally, providing the ability to dedicate the module as the host application or an external 

processor as the host. The module also provides the ability to communicate externally with 

standard or customer specific communication protocols.
The custom application software has access to the flash memory, navigation data from the GPS 

Navigation software, and access to various I/O lines used on the module.
This can be developed using the SiRF SDK. The SDK provides all the tools and resources 

necessary for custom software development. Refer to http://www.sirf.com for more information 

about the SDK.