Proxim RangeLAN2 7920 Instrukcja Użytkownika Pobierz pdf (Strona 31)

Figure 9. BL2000 (Z-World) [From Ref. 8]

C. G.P.S

1. Motorola M12

The Motorola M12 GPS card is designed for use in either automotive or marine

applications. The card utilizes a 6VDC input and provides a standard serial port output.

A powered antenna is provided with a built-in magnetic base for ease of mounting on

automotive or marine applications. The accuracy of the GPS card is 100m without a

differential antenna but with a differential antenna an accuracy of 1-5m can be expected.

The output from the card is fully programmable and can easily be changed to meet the

users needs, the output string will always contain unneeded data about the status of the

satellites tracked and the signal strength, this unneeded data is filtered out in the software

and this process is covered in more detail later.

The string is formatted as follows:

@@Eq,mm,dd,yy,ss,dd,mm.mmmm,n,dd,mm.mmmm,w,shhhhh.h,sss.s,hhh.h,

m,t, dd.d,nn,rrrr,aa,CCC<CR><LF>.

• @@Eq >> Header

• mm,dd,yy,ss >> Time stamp

• dd,mm.mmmm >> Latitude

1 2 ... 26 27 28 29 30 31 32 33 34 35 36 ... 102 103

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Proxim RangeLAN2 7920 Instrukcja Użytkownika Strona 31