Hello Yves,
?
Thank you for your screenshoot. Here is what I got on my board.
?
TP20 B (with look cable between port 1 and port 2):?
?
?
TP18 A (OPEN loop between port 1 and port 2):
?
?
TP16 R:
?
?
I check the TP1 5V and the voltage is OK here.?
?
Two points here :
- The IF frequency seems to be off, I have 22 KHz instead of 4 KHz. Do I have a problem with one of the final OL ? Perhaps it is why I have nothing on TP7,8,9. There is some LC filter in the board. ?
- I had to put the probe level in x2 mode in my scope to measure the same voltage than you in peak to peak mode. The voltage I measure initially was divided by two. I don't think this is important.?
?
?
MattSNE