Agilent X-Series Signal Generators SCPI Command Reference 379
Real–Time Commands
Custom Subsystem–Option 431([:SOURce]:RADio:CUSTom)
Custom Subsystem–Option 431([:SOURce]:RADio:CUSTom)
:ALPha
Supported N5172B/82B with Option 431
[:SOURce]:RADio:CUSTom:ALPHa <val>
[:SOURce]:RADio:CUSTom:ALPHa?
This command changes the Nyquist or root Nyquist filter’s alpha value.
The filter alpha value can be set to a minimum level (0), a maximum level (1), or in between by
using fractional numeric values (0.001–0.999).
*RST
+3.50000000E001
Range 0.000–1.000
Key Entry Filter Alpha
Remarks
To change the current filter type, refer to “:FILTer” on page 388.
:BASeband:FREQuency:OFFSet
Supported N5172B/82B with Option 431
[:SOURce]:RADio:CUSTom:BASeband:FREQuency:OFFSet <value><unit>
[:SOURce]:RADio:CUSTom:BASeband:FREQuency:OFFSet?
This command offsets the baseband frequency relative to the carrier. The feature is useful for moving
the signal such that the carrier feed–through is not in the center.
Agilent X-Series vector signal generators provide automatic DAC over–range protection when the
offset value is something other than 0 Hz. It scales down the playing I/Q data by 1/square root of 2.
*RST +0.00000000E+000
Range +8.0E7 to –8.0E7 Hz
:BASeband:FREQuency:OFFSet:PHASe:RESet
Supported N5172B/82B with Option 431
[:SOURce]:RADio:CUSTom:BASeband:FREQuency:OFFSet:PHASe:RESet
This command clears the phase accumulation resulting in a phase shift of zero.
When the Baseband Frequency Offset is non–zero, the hardware rotator accumulates phase–shift of
the baseband signal. This residual phase remains even after the offset value is returned to zero.
While there is a non–zero residual phase present in the signal, the DAC Over–Range Protection
feature will automatically prevent DAC overrange errors from occurring by scaling the signal down by
1/square root of 2.
Key Entry Baseband Frequency Offse
t
Key Entry Baseband Frequency Offset Phase Reset
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