Technical data

354 Agilent Signal Generators Programming Guide
Creating and Downloading User–Data Files
FIR Filter Coefficient Downloads (N5162A, N5182A, E4438C and E8267D)
Downloading FIR Filter Coefficient Data
The signal generator stores the FIR files in the FIR (/USER/FIR) directory, which utilizes non–volatile
memory (see also “Signal Generator Memory” on page 309). Use the following SCPI command line to
download FIR filter coefficients (file) from the PC to the signal generator’s FIR directory:
:MEMory:DATA:FIR <"file_name">,[REAL,]osr,coefficient
:MEMory:DATA:FIR
<"file_name">,COMPlex,osr,realCoefficient,imaginaryCoefficient,...
Use the following SCPI command line to query list data from the FIR file:
:MEMory:DATA:FIR? <"file_name">
Sample Command Line
The following SCPI command will download a typical set of real modulation 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,... the FIR filter coefficients
Selecting a Downloaded User FIR Filter as the Active Filter
NOTE For information on manual key presses for the following remote procedures, refer to the
User’s Guide.
FIR Filter Data for TDMA Format
The following remote command selects user FIR filter data as the active filter for a TDMA modulation
format.
:RADio:<desired format>:FILTer <"file_name">
This command selects the user FIR filter, specified by the file name, as the active filter for the TDMA
modulation format. After selecting the file, activate the TDMA format with the following command:
:RADio:<desired format>:STATe On