Programming instructions

Downloading and Using Files
FIR Filter Coefficient Downloads
Chapter 4180
Downloading FIR Filter Coefficient Data
Use the following SCPI command line to download FIR filter coefficients from the PC to the
signal generator’s FIR memory:
:MEMory:DATA:FIR "<file_name>",osr,coefficient{,coefficient}
Use the following SCPI command line to query list data from FIR memory:
:MEMory:DATA:FIR? "<file_name>"
Sample Command Line
The following SCPI command will download a typical set of FIR filter coefficient values and
name the file “FIR1”:
:MEMory:DATA:FIR "FIR1",4,0,0,0,0,0,0.000001,0.000012,0.000132,0.001101,
0.006743,0.030588,0.103676,0.265790,0.523849,0.809508,1,1,0.809508,0.523849,
0.265790,0.103676,0.030588,0.006743,0.001101,0.000132,0.000012,0.000001,0,
0,0,0,0
FIR1 assigns the name FIR1 to the associated OSR (over sample ratio) and
coefficient values. The file is then represented with this name in the FIR
File catalog.
4 specifies the oversample ratio.
0,0,0,0,0,
0.000001,... represent FIR filter coefficients.
Selecting a Downloaded User FIR Filter as the Active Filter
FIR Filter Data for TDMA Format
The following front panel key presses or remote commands will select user FIR filter data as
the active filter for a TDMA modulation format.
Via the front panel:
1. Press
Mode > Real Time TDMA > desired format > Modify Standard > Filter > Select > User FIR
2. Highlight the desired file in the catalog of FIR files.
3. Press
Select File.
To activate the TDMA format press
Mode > Real Time TDMA > desired format and toggle the
format on.