Agilent Technologies N5181A/82A User Manual download pdf (Page 299)

Agilent N518xA, E8663B, E44x8C, and E82x7D Signal Generators Programming Guide 289

Creating and Downloading User-Data Files

User File Data (Bit/Binary) Downloads (E4438C and E8267D)

The following figure shows the same downloaded data from the above example as viewed in the

signal generator’s bit file editor (see the User’s Guide for more information) and with using an

external hex editor program.

In the bit editor, notice that the ignored bit of the bit- data is not displayed, however the hex value

still shows all three bytes. This is because bits 1 through 7 are part of the first byte, which is shown

as ASCII character x in the SCPI command line. The view from the hex editor program confirms that

the downloaded three bytes of data remains unchanged. To view a downloaded bit file with an

external hex editor program, FTP the file to your PC/UNIX workstation. For information on how to

FTP a file, see “FTP Procedures” on page 303.

Even though the signal generator views the downloaded data on a bit basis, it groups the data into

bytes, and when the designated number of bits is not a multiple of 8 bits, the last byte into one or

SCPI Command

:MEM:DATA:BIT <"file_name">,<bit_interest>,<datablock>

:MEM:DATA:BIT "3byte",23, # 1 3 Z&x

0 1 0 1 1 0 1 0 0 0 1 0 0 1 1 0 0 1 1 1 1 0 0 0

Downloaded Data:

Byte 1

Byte 2

Byte 3

Bits of interest

Ignored bit (LSB)

Hex Value:

MSB

ASCII representation of the data (3 bytes)

ASCII Representation:

Start block data

number of bytes

number of decimal digits

Hex values

Bit data

Designated number of bits

3 bytes of data

10 byte file header

(added by signal generator)

Designated number of bits (hex value = 23 decimal)

As Seen in a Hex Editor

:MEM:DATA:BIT "3byte",23,#13Z&xSCPI command to download the data

As Seen in the Signal Generator’s Bit File Editor

1 2 ... 294 295 296 297 298 299 300 301 302 303 304 ... 365 366

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Agilent Technologies N5181A/82A User Manual Page 299