The Noise Power Ratio signal is typically composed of thousands of equally spaced tones. The relative phase between the tones can be random, parabolic, or constant. Random phase results in a Gaussian noise signal as indicated on the CCDF plot. Constant phase results in an impulse with an extremely high crest factor as shown on the CCDF plot. Parabolic phase results in a low crest factor and a CCDF plot that is much less stressful than Gaussian noise.
The NPR parameters are independent of the system configuration. That is to say that the parameters are always available regardless of the system configuration. However, many parameter limits are dependent on the actual system configuration. The ESG/PSG internal Arb can provide NPR signals with modulation bandwidths up to 80 MHz. The MXG internal Arb can provide NPR signals with modulation bandwidths up to 100 MHz. The following parameters are used to define the NPR signal.
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NPR instrument control parameters require a Play command to update their settings. These parameters include Frequency, Amplitude, RF Output, Trigger Mode, Marker Polarity. The NPR signal and correction parameters require a Download command to update. |
