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SPECTRASYS RF amp and mixer model - only 3rd harmonic

Question asked by SAABERICSSON on Nov 16, 2003
Latest reply on Mar 16, 2004 by ROB_LEFEBVRE

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In Genesys 2003.03 it seems SPECTRASYS only calculates and displays up to 3rd harmonic for the RF amp and mixer model using power spectrum display. I see no way to change any option setting to calculate up to e.g. 7th overtone.

Am I missing a setting somewhere?

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rulonv Nov 18, 2003 3:49 AM
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The amplifier and mixer models in 2003.03 and all prior versions only support up to 3rd order products. In order to support higher order products the user must have the intercept points (IP4, IP5, IP6, IP7, etc) or polynomial coefficients for the nonlinear transfer characteristic. However, the table mixer will support higher order products than 3rd order.

In version 2003.10 we have a high order amplifier that supports up to 20th order ... this includes all intermods and harmonics. We have provided a convenient way for the user to enter measured intermod combinations which the amplifier model uses to determine the polynomial coefficients.
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SAABERICSSON Mar 9, 2004 8:36 AM
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Will there be a 20th order mixer in Genesys 2004?

"

In version 2003.10 we have a high order amplifier that supports up to 20th order ... this includes all intermods and harmonics. We have provided a convenient way for the user to enter measured intermod combinations which the amplifier model uses to determine the polynomial coefficients.
"
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ROB_LEFEBVRE Mar 16, 2004 9:42 AM
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There already is a high order mixer in 2003.10. Look at the spectrasys/mixer examples and the mixer reference in the element catalog.

Rob
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SPECTRASYS RF amp and mixer model - only 3rd harmonic

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