USGlobalsat ET-316A - Manual (Page 13)

ET-316A
The Specifications are subject to be changed without notice. Copyright © 2007, GlobalSat Technology.
Page 13 of 17
Version 1.2
0=None, 1=Odd, 2=Even
Example 1: Switch to SiRF Binary protocol at 9600,8,N,1
$PSRF100,0,9600,8,1,0*0C
Example 2: Switch to User1 protocol at 38400,8,N,1
$PSRF100,4,38400,8,1,0*38
**Checksum Field: The absolute value calculated by exclusive-OR the 8 data bits of
each character in the Sentence,between, but excluding “$” and “*”. The
hexadecimal value of the most significant and least significant 4 bits of the result are
convertted to two ASCII characters (0-9,A-F) for transmission. The most
significant character is transmitted first.
** : Hex 0D 0A
B). Navigation lnitialization ID：101 Parameters required for start
This command is used to initialize the module for a warm start, by providing current position （in X, Y, Z
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, produce a faster navigational solution.
When a valid Navigation Initialization command is received, the receiver will restart using the input
parameters as a basis for satellite selection and acquisition.
Format：
$PSRF101,,,,,,,,
*CKSUM
X coordinate position
INT32
Y coordinate position
INT32
Z coordinate position
INT32
Clock offset of the receiver in Hz, Use 0 for last saved