Agilent Technologies E4438C Manuel d'instructions télécharger pdf (Page 193)

Downloading and Using Files

Downloads Directly into Pattern RAM (PRAM)

Chapter 4 187

Via the remote interface:

For TDMA formats, send the following SCPI command:

[:SOURce]:RADio:<desired format>[:STATe]:ON

For custom modulation, send:[:SOURce]:RADio:CUSTom[:STATe]:ON

To adjust symbol rate, filtering, or other parameters, send the appropriate SCPI command.

SCPI Command to Download Data in Block Format

:MEMory:DATA:PRAM:BLOCk <datablock>

This command downloads the block-formatted data directly into pattern RAM.

Sample Command Line

A sample command line:

:MEMory:DATA:PRAM:BLOCk #ABC

#A the number of decimal digits to follow in B

B a decimal number specifying the number of data bytes in C

C the binary user file data

Example 1

:MEMory:DATA:PRAM:BLOCk #1912S407897

#1 defines the number of decimal digits to follow in “B”.

9 denotes how many bytes of data are to follow.

12S407897 is the ASCII representation of the data downloaded to the signal generator.

This variable is represented by C in the sample command line.

NOTE Not all binary values can be printed as ASCII characters. In fact, only ASCII

characters corresponding to decimal values 32 to 126 are printable keyboard

characters. The above example was chosen for simplicity. Typically, the binary

value corresponding to your 8-bit pattern is not printable.

Therefore, the program written to download and upload user files must

correctly convert between binary and the visible representation of the data

sequence.

1 2 ... 188 189 190 191 192 193 194 195 196 197 198 ... 207 208

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Agilent Technologies E4438C Manuel d'instructions Page 193