you are right, some series resistor could reduce the harmonics from the clock,but I debug through series resistors, and the best is -80dbm(before it was -70dbm, see the picture)
And I chose SAHi and SALo two modes to set the same 240-350MHz, the test results are different.
So I attribute the reason to SAHi mode because it doesn't go through the filter.
and I mistakenly wrote it to change to 130MHz, then the accuracy should be that the IF can choose a 240MHz SAW filter.
Can't the IF filter be replaced?
