Farhan,
Yes, Si5351 crosstalk may not be a problem worth chasing for most.
Though a hack to the 6dB pads would be quite easy to do, if that does help.
In addition to RX birdies, I can believe si5351 crosstalk might contribute to spurs on TX.
Though Raj's extra 45mhz filter seems to bring down all spurs well enough, and that occurs
before clk2 enters the mixer.?
Having 12mhz get into clk1 will contribute to carrier leakage on TX.
But residual carrier is not a deal breaker for most of us.
I'm thinking of you and your parents.
I know from experience that these health issues can be all consuming.?
Wishing all of you the best.
Jerry, KE7ER
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On Wed, Sep 12, 2018 at 11:16 AM, Ashhar Farhan wrote:
the si5351 cross talk is not causing either distortions or harmonics. it can result in the birdies, but that's about all.
?
the spurs in the 57 MHz and the 12 Mhz clocks are confined by the following filters at 12 Mhs and 45 Mhz. The only spurs that you have to actually bother about (only on the rx side) are those in the first mixer's oscillators.
