Motorola Pro FLX Manuel d'utilisateur télécharger pdf (Page 47)

Design and Implementation of a Practical FLEX Paging Decoder

Grayson Wireless 39

due to not decoding Sync1 and thus not receiving Sync1. The

rate

is always 4 for 6400-4FSK.

The

An_Errs

is the error bits for both synchronization words in Sync1. The

frameInfo

is the

received 21-data bits in the frame information codeword plus the 2-bit error indication. The

C_Errs

is the error bits for both synchronization words in Sync2. The

blockData

is the received

21-data bits in each block codeword plus the 2-bit error indication. The

result

is a byte value to

indicate which data was received.

Table 4-3

Format of each frame in RrF4nnnn.aaa files

An analyzing program was written to compare the known random pattern and each decoded

pattern at each signal level to produce a resultant file of bit error rates. The source code for the

analyzer code is in the Appendix.

C variable type name byte size

unsigned char rate 1

unsigned char An_Errs[2] 2

unsigned long int frameInfo 4

unsigned char C_Errs[2] 2

unsigned long int blockData[352] 1408

unsigned char result 1

1 2 ... 42 43 44 45 46 47 48 49 50 51 52 ... 73 74

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Motorola Pro FLX Manuel d'utilisateur Page 47