Hello,
After a burnt of the old LM1117 regulator, I changed to a 78M05 and lot of other components (uP, diodes, Si 5351, 74ACT00, LCD,? and the 3 BS170)
I am blocked on the FST3253. When I have a signal on Z and W (180¡ã phase shifted) of 7.02MHZ .. I have nothing at the output on X0-X3 , Y0-Y3. I changed the FST3253 and remove the resistances R5,R6,R8 and R9 .... Nothing ....
On the input, I have a DC component of 3.6V plus my RF signal .... at the output a DC component of 2V and no AC signal at 700Hz ...
I firstly don't understand why the DC component at the input isn't 2.5V .... and why these strange values at the output. I changed twice the FST, the 5V DC is ok, and the clocks signals from Si 5351 also .... It seems like the MUX is not working ???? Any idea to test it ??
Best 73,
Nico
