參數(shù)資料
型號: GXB1000
廠商: Sony Corporation
英文描述: 16-Channel GPS Receiver Module(16通道全球數(shù)字定位系統(tǒng)(GPS)接收器模塊)
中文描述: 16通道GPS接收機模塊(16通道全球數(shù)字定位系統(tǒng)(GPS)的接收器模塊)
文件頁數(shù): 17/61頁
文件大?。?/td> 300K
代理商: GXB1000
S-8
GXB1000
1-2-3. Almanac data output
No.
BIT
76543210
Contents
Setting value
Output data
(HEX)
1
2
·
·
·
·
·
44
45
10100100
0xxxxxxx
·
·
·
·
·
0xxxxxxx
11011010
Header
Terminator. "Z" + 80H
A4
DA
Example
After the receiver receives an almanac output request, it transmits a response and then outputs the almanac
data. The above format is for 1 subframe of the almanac data, and 64 frames of this data are sent in
succession. Almanac communication data is sent by dividing the original data into 7-bit sections.
The almanac data stored in the GPS receiver memory has the configuration shown below. Normally each word
of the almanac data has 6-bit parity, but this is eliminated when the data is stored in the memory. In addition, a
16-bit checksum is added in consideration of communication.
WORD1
24 bits
WORD2
24 bits
WORD3
24 bits
WORD4
24 bits
WORD5
24 bits
WORD6
24 bits
WORD7
24 bits
WORD8
24 bits
WORD9
24 bits
WORD10
24 bits
Checksum
16 bits
The relationship between the above
data and the communication data is
shown to the right.
(1) Relationship between word data and communication data
23
Before conversion
After conversion
31
0
0
0
0
0
0 0 0 0
0
15
Before conversion
After conversion
23
0
0
0
0
0 0 0 0 0
0
(2) Relationship between checksum and communication data
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