Other Parts Discussed in Thread: DAC38J84
DAC38J84 + TRF3705
My design is almost a copy of EVM:
DAC38J84 + LPF550MHz + TRF3705,DAC output is quite clean:
with LO = 800MHz,TRF3705 output:
calibrate DC_offset,LO feedthrough can be suppressed to about -67 dBc,but 2xLO did not drop,and LO-Fin/LO+2Fin/LO-2Fin can not be further suppressed.Those are spurs for Fin,I expect a spur suppression of -65dBc,is that possile??and how??