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Ansoft Designer / Ansys Designer 在线帮助文档：

System Simulator >
System Component Models >
Probes >
   Signal to Noise & Distortion Probe (SINADP)       

Signal to Noise & Distortion Probe (SINADP)

 

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Properties

Description

Units

Default

Range/Type

Name

Probe name

None

Required

String

INITSAMP1

Number of initial samples removed from input1 waveform

None

0

[0,Inf)/Integer

INITSAMP2

Number of initial samples removed from input2 waveform

None

0

[0,Inf)/Integer

RIN1

Input1 impedance

Ohm

Inf

(0, Inf]/Real

RIN2

Input2 impedance

Ohm

Inf

(0, Inf]/Real

Notes

1. This model is used to calculate the signal to noise and distortion ratio (SINAD) in a digital communications system by computing the average power E(Vv+n (t))2 for the received input stream with noise and distortion (Signal+Noise+Distortion) and the average E(Vv (t))2 of the corresponding input stream without noise (Signal). The average noise power is computed as:

The final SINAD value is computed as:

Systems with a high SINAD ratio require a large number of samples be transmitted through the system to obtain an accurate measure of SINAD.

Netlist Form

SINADP:NAME n1 n2 [Initsamp1=val] [Initsamp2=val] [Rin1=val] [Rin2=val]

Netlist Example

SINADP:my_sinadp 1 2

 



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