USGlobalsat EM-408 - Manual (Page 11)

EM-408
Specifications are subject to be changed without notice.
Page 11 of 14
Version 1.4.1
Y coordinate position
INT32
Z coordinate position
INT32
Clock offset of the receiver in Hz, Use 0 for last saved value if
available.
If this is unavailable, a default value of 75000 for GSP1, 95000 for
GSP 1/LX is used.
INT32
GPS Time Of Week
UINT32
GPS Week Number
UINT16
Week No and Time Of Week calculation from UTC time
Number of channels to use.1-12. If your CPU throughput is not high
enough, you could decrease needed throughput by reducing the
number of active channels
UBYTE
bit mask
0×01=Data Valid warm/hotstarts=1
0×02=clear ephemeris warm start=1
0×04=clear memory. Cold start=1
UBYTE
Example: Start using known position and time.
$PSRF101,-2686700,-4304200,3851624,96000,497260,921,12,3*7F
C.) Set DGPS Port ID:102 Set PORT B parameters for DGPS input
This command is used to control Serial Port B, an input serial only port used to receive RTCM
differential corrections. Differential receivers may output corrections using different
communication parameters. The default communication parameters for PORT B are set for 9600
Baud, 8data bits, 0 stop bits, and no parity. If a DGPS receiver is used which has different
communication parameters, use this command to allow the receiver decode data correctly.
When a valid message is received, the parameters are stored in a battery backed SRAM.
Resulting, GPS receiver using the saved Parameters for restart.
Format:
$PSRF102,,,,*CKSUM
1200,2400,4800,9600,19200,38400
8
0,1
0=None,Odd=1,Even=2
Example: Set DGPS Port to be 9600,8,N,1
$PSRF102,9600,8,1.0*12