User File Data (Bit/Binary) Downloads (E4438C And E8267D) - Keysight E4428C ESG RF Programming Manual

User File Data (Bit/Binary) 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 (N5162A,
N5182A, E4438C and E8267D Only)" on page 380.
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.
The signal generator accepts externally created and downloaded user file data for real–time
modulation formats that have user file as a data selection (shown as <"file_name"> in the data
selection SCPI command). When you select a user file, the signal generator incorporates the user file
data (payload data) into the modulation format's data fields. You can create the data using programs
such as MATLAB or Mathcad. The following table shows the available real–time modulation formats
by signal generator model:
E4438C ESG
a
CDMA TDMA
c
Custom W–CDMA
GPSe
a
Requires Option 401.
b
Real–time TDMA modulation formats require Option 402 and include EDGE, GSM, NADC, PDC,
PHS, DECT, and TETRA.
c
For ESG, requires Option 001, 002, 601, or 602, for PSG requires Option 601 or 602.
d
Requires Option 400.
e
Requires Option 409.
The signal generator uses two file types for downloaded user file data: bit and binary. With a bit file,
the signal generator views the data up to the number of bits specified when the file was downloaded.
For example, if you specify to use 153 bits from a 160 bit (20 bytes) file, the signal generator
transmits 153 bits and ignores the remaining 7 bits. This provides a flexible means in which to
control the number of transmitted data bits. It is the preferred file type and the easiest one to use.
With a binary file, the signal generator sees all bytes (bits) in a downloaded file and attempts to use
them. This can present challenges especially when working with framed data. In this situation, your
file needs to contain enough bits to fill a frame or timeslot, or multiple frames or timeslots, to end
on the desired boundary. To accomplish this, you may have to remove or add bytes. If there are not
enough bits remaining in the file to fill a frame or timeslot, the signal generator truncates the data
causing a discontinuity in the data pattern.
Keysight Signal Generators Programming Guide
E2867D PSG
b
Custom
d e
GPS
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User File Data (Bit/Binary) Downloads (E4438C and E8267D)

c
Creating and Downloading User–Data Files
323