steven_l
Member level 1
I have a question：
I upload a mixer tutorial.
The tutorial teaches me how to test IIP3 with the help of QPSS+QPAC.
As to the mixer example, variable frf=2.4GHz, and variable flo=2.4GHz. This means fif=0 Hz.
But when stimulating IIP3, frf is set to 2.401GHz, and in the QPAC panel, Sweep Type is set to 2.4011GHz.
If frf=2.401GHz, then fif=1MHz ,not 0 Hz.
Why？
So if a mixer needs frf=2.4GHz, flo=2GHz, meaning fif=400MHz:
how to set frf and QPAC?
Still make frf=2.401GHz and Sweep Type is set to 2.4011GHz？
When plot IIP3, still select 3rd Order Harmonic:1 -2 and 1st Order Harmonic:-1 0?
I upload a mixer tutorial.
The tutorial teaches me how to test IIP3 with the help of QPSS+QPAC.
As to the mixer example, variable frf=2.4GHz, and variable flo=2.4GHz. This means fif=0 Hz.
But when stimulating IIP3, frf is set to 2.401GHz, and in the QPAC panel, Sweep Type is set to 2.4011GHz.
If frf=2.401GHz, then fif=1MHz ,not 0 Hz.
Why？
So if a mixer needs frf=2.4GHz, flo=2GHz, meaning fif=400MHz:
how to set frf and QPAC?
Still make frf=2.401GHz and Sweep Type is set to 2.4011GHz？
When plot IIP3, still select 3rd Order Harmonic:1 -2 and 1st Order Harmonic:-1 0?