Motorola M12 Oncore User Manual page 47

Input Command
Response Message
Motorola GPS Products
M12 Oncore User' s Guide Supplement
Revision 1.0 01/25/00
ALMANAC DATA OUTPUT
Motorola Binary Format
• Request Almanac Data:
@@BemC<CR><LF>
m mode
C checksum
Message length: 8 bytes
• To above command:
@@Cbspxxx...xxxC<CR><LF>
sp subframe/page
xxx....xxx data words
C checksum
Message length: 33 bytes
NOTE: If an almanac is present in the GPS receiver, then the receiver outputs all of the
almanac pages. Otherwise, it returns one output message with all of the
message bytes set to zero.
0 = output response message once (polled)
1 = output response message when almanac
data changes (continuous)
subframe 5 / pages 1 – 25, or
subframe 4 / pages 2 – 5, 7 – 10, 25
words 3 - 10, each word is 3 bytes long
(format per ICD-GPS-200)
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