Et-314 – USGlobalsat ET-314 User Manual
Page 17
ET-314
The Specifications are subject to be changed without notice. Copyright © 2007, GlobalSat Technology.
Page 17 of 19
Version 1.2
<Parity>
0=None,Odd=1,Even=2
Example: Set DGPS Port to be 9600,8,N,1
＄PSRF102,9600,8,1.0*12
D). Query/Rate Control ID:103 Query standard NMEA message and/or set output rate
This command is used to control the output of standard NMEA message GGA, GLL, GSA,
GSV
RMC, VTG. Using this command message, standard NMEA message may be polled once, or
setup for periodic output. Checksums may also be enabled or disabled depending on
the needs of the receiving program. NMEA message settings are saved in battery backed
memory for each entry when the message is accepted.
Format:
＄PSRF103,<msg>,<mode>,<rate>,<cksumEnable>*CKSUM<CR><LF>
<msg>
0=GGA,1=GLL,2=GSA,3=GSV,4=RMC,5=VTG
<mode>
0=SetRate,1=Query
<rate> Output every <rate>seconds, off=0,max=255
<cksumEnable> 0=disable Checksum,1=Enable checksum for specified
message
Example 1: Query the GGA message with checksum enabled
＄PSRF103,00,01,00,01*25
Example 2: Enable VTG message for a 1Hz constant output with checksum enabled
＄PSRF103,05,00,01,01*20
Example 3: Disable VTG message
＄PSRF103,05,00,00,01*21
E). LLA Navigation lnitialization ID:104 Parameters required to start using
Lat/Lon/Alt
This command is used to initialize the module for a warm start, by providing current
position (in Latitude, Longitude, Altitude coordinates), clock offset, and time. This
enables the receiver to search for the correct satellite signals at the correct signal
parameters. Correct initialization parameters will enable the receiver to acquire
signals more quickly, and thus, will produce a faster navigational soution.
When a valid LLANavigationInitialization command is received,the receiver will restart
using the input parameters as a basis for satellite selection and acquisition.
Format:
＄PSRF104,<Lat>,<Lon>,<Alt>,<ClkOffset>,<TimeOfWeek>,<WeekNo>,