Analog Demod:FM DeEmphasis (s) Property

RFmx Demod 19.1 Help

Edition Date: October 2019

Part Number: 374641M-01

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Short Name: ADemod FM DeEmphasis (s)

Property of RFmxDemod

Specifies the time constant of de-emphasis filter, which compensates for the pre-emphasis filter in the FM transmitter. This value is expressed in seconds.

The lowpass characteristic transfer function of the de-emphasis filter is as shown in the following equation:

H(f) = 1/(1+j(2*pi*f*τ)

where τ is the de-emphasis filter time constant. This value is expressed in seconds.

You do not need to use a selector string to configure or read this property for the default signal instance. Refer to the Selector Strings topic for information about the string syntax for named signals.

The default value is 0 seconds. No filter is applied on the demodulated signal when de-emphasis is set to 0.

Remarks

The following table lists the characteristics of this property.

Datatype
Permissions	Read/Write
High-level VIs	RFmxDemod ADemod Configure FM DeEmphasis
Resettable	Yes