GPS S
MART
R
ECEIVER WITH
A
NTENNA
GPS-622F
Settin
2.2 Serial Port Settings
The default configuration within the standard GPS firmware is the Standard configuration of
serial port:
Supporting 9600 baud rate, 8 data bits, no parity, 1 stop bit, no flow control
2.3
2.3 GPS Status Indicator
Non-
Non-Fixed mode : LED is always on
Fixed mode : LED toggle every second
1. Communication Specifications
Item
Interface
Bit rate
Start bit
Stop bit
Data bit
Parity
Transmission data
Update rate
Output sentence
Description
Full duplex serial interface
Default 9600
1bit
1bit
8bit
None
SACII NMEA0183 Ver:3.01
1Hz
GGA/GSA/GSV/RMC/VTG (typ)
Table 2: Communication specifications
Multi-
2.6 Multi-path Mitigation
Multipath refers to the existence of signals reflected from objects in the vicinity of a receiver's
antenna that corrupt the direct line-of-sight signals from the GPS satellites, thus degrading
the accuracy of both code-based and carrier phase–based measurements. Particularly difficult
is close-in multipath in which the reflected secondary signals arrive only slightly later (within
about 100 nanoseconds) than does the direct-path signal, having been reflected from objects
only a short distance from the receiver antenna.
GPS-622F deploys the advanced multi-path detection and suppression algorithm to reduce
multipath errors, the GPS signals themselves can be designed to provide inherent resistance
to multipath errors
DS-GPS-622F-2
Sept 11
©2010
www.rfsolutions.co.uk
Page 5
RFSOLUTIONS [ RFSOLUTIONS.LTD ]
