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Agilent N518xA, E8663B, E44x8C, and E82x7D Signal Generators Programming Guide 309
Creating and Downloading User-Data Files
Pattern RAM (PRAM) Data Downloads (E4438C and E8267D)
Pattern RAM (PRAM) Data Downloads (E4438C and E8267D)
NOTE This section applies only to the E4438C with Option 001, 002, 601, or 602, and the E8267D
with Option 601 or 602.
If you encounter problems with this section, refer to “Data Transfer Troubleshooting
(N5182A, E4438C and E8267D Only)” on page 340.
To verify the SCPI parser’s responsiveness when remotely using the :MEM:DATA SCPI
command to upload files, the file’s upload should be verified using the *STB? command.
Refer to the SCPI Command Reference.
This section contains information to help you transfer user-generated PRAM data from a system
controller to the signal generator’s PRAM. It explains how to download data directly into PRAM and
modulate the carrier signal with the data.
The control bits included in the PRAM file download, control the following signal functions:
•bursting
• timing signal at the EVENT 1 rear panel connector
• data pattern reset
PRAM data downloads apply to only real-time Custom and TDMA modulation formats. In the TDMA
formats, PRAM files are available only while using the unframed data selection. The following table
on page 310 shows which signal generator models support these formats.
20 ns
32QAM (5 bits per symbol)
100 ns
10 Msps
10.000001 Msps
bit rate = bits per symbol x symbol rate
NOTE: The pulse widths values are only for example purposes. The actual width may vary from the above values.