Measuring phase, delay errors accurately in I/Q modulators
Keywords: I/Q modulator RF signals phase and delay errors
[Summary of tips] A direct I/Q modulator, such as the LT5528, translates baseband I and Q signals to RF, and combines them to produce a modulated single sideband signal with (ideally) minimal residual carrier (LO feedthrough) and image signals (undesired sideband). In an ideal I/Q modulator, with perfect 90° phase shift between the I mixer ......|
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