Programming instructions

Downloading and Using Files
User File Data Downloads
Chapter 4174
Figure 4-3 Repeating Different Length User Files
Downloading User File Data
This section includes information that explains how to download user file data. It includes
data requirements and limitations, preliminary setup, SCPI commands and sample command
lines for both downloads to bit memory and binary memory.
Data Requirements and Limitations Summary
1. Data must be binary.
2. Bit length must be a multiple of the data-field length of the active TDMA format.
3. User file size is limited by the available memory.
4. When designing user files, you must consider the signal generator’s PRAM size
(8 Msample or 32 Msample), framing overhead, and available memory.
5. For downloads to binary memory, bit length must be a multiple of eight; SCPI specifies the
data in 8-bit bytes.
NOTE Not all binary values are ASCII characters that can be printed. Only ASCII
characters corresponding to decimal values 32 through 126 are printable
keyboard characters. Typically, the ASCII character corresponding to an 8-bit
pattern is not printable.
Because of this, the program written to download and upload user files must
correctly convert the binary data into 8-bit characters.