Motorola Pro FLX Manuel d'utilisateur télécharger pdf (Page 45)

Design and Implementation of a Practical FLEX Paging Decoder

Grayson Wireless 37

could be extracted out. The program saved the random data to a file for later processing (file

number and flex rate given). The program would also adjust the output power level of the

generator and start the flex encoder. The program would also stop the encoding. The listing of

this program is in the Appendix. Each function that the program performed was based on its

command line arguments.

Figure 4-4

FLEX data measurement

The PAGETRACKER



Pro software, owned by Grayson Wireless, was mostly coded by the

author. The code was modified to incorporate a raw FLEX data frame collected using the HP-IB

program that interfaces to the HP8648A. Figure 4-5 shows the block diagram of how the test

was performed. All HP8648A accesses were performed by calling the previously discussed HP-

IB program with the appropriate arguments. The filename that the random data is saved to is

FLX4nnnn.RND

, where nnnn is the unique file number assigned to each random FLEX cycle.

The file format for this file is shown in Table 4-2. The unsigned long int is the actual 32-bit

codeword downloaded to the HP8648A.

Table 4-2

Format of

FLX4nnnn.RND

files

HP8648A

Sig Gen

Output

Ant 1

PC running

PAGETRACKER

Pro

HP-IB

Ant 2

Ant 3

Ant 4

4 to 1

Splitter

Grayson

Wireless

Measurement

System

Serial

Port

C variable type name byte size

unsigned long int frameInfo 4

unsigned long int blockData[352] 1408

1 2 ... 40 41 42 43 44 45 46 47 48 49 50 ... 73 74

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Motorola Pro FLX Manuel d'utilisateur Page 45

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