The procedure for requesting AWR support has changed. Please read all about
the new AWR product support process.
HTML |
---|
<!--support, this is good and keep it around--> |
Problem
Why, when assembling an I/Q modulator or demodulator using MIXER_B/MIXER_F, is a phase shift of +90 degrees applied to the LO signal rather than -90 degrees?
Version and Product
All Versions of VSS
Solution
In an ideal I/Q modulator or demodulator, the I channel is mixed with cos(2Ï€ fLO t), while the Q channel is mixed with -sin(2Ï€ fLO t):
Using the identity:
...