RfsaIQAcquisitionConfiguration.SignalBandwidth Property
- Updated2025-07-17
- 1 minute(s) read
Rfsa
Gets or sets the bandwidth of the input signal around the I/Q carrier frequency. This value must be less than or equal to (0.8 × I/Q rate).
Namespace: NationalInstruments.ModularInstruments.NIRfsa
Assembly: NationalInstruments.ModularInstruments.NIRfsa.Fx45 (in NationalInstruments.ModularInstruments.NIRfsa.Fx45.dll) Version: 2025
Syntax
public double SignalBandwidth { get; set; }
Public Property SignalBandwidth As Double Get Set
Property Value
DoubleThe default value is 0 Hz.
Exceptions
| Exception | Condition |
|---|---|
| ObjectDisposedException | The SignalBandwidth property was accessed after the associated NIRfsa object was disposed. |
Remarks
NI-RFSA defines signal bandwidth as twice the maximum I/Q signal deviation from 0 Hz. Usually, the baseband signal center frequency is 0 Hz. In such cases, the
signal bandwidth is simply the baseband signal's minimum frequency subtracted from its maximum frequency, or fmax - fmin.
If you do not set this property, NI-RFSA uses the maximum available signal bandwidth. Depending on your device settings, setting this attribute enables certain
optimizations. Based on the specified signal bandwidth, NI-RFSA decides the minimum equalized bandwidth and equalizer gain.
You must set this property to enable the DownconverterFrequencyOffsetMode property.
Ensure you set the signal bandwidth wide enough to encompass all significant anticipated input power. In cases where NI-RFSA optimizes the input gain based on the
signal bandwidth, significant input power outside the signal bandwidth can lead to clipping and associated overflow warnings if you do not have enough margin in your reference level.