Hi Henrik

I am trying to help a friend who built an air band receiver but he's having trouble in a certain frequency approach, 120.00 MHZ, because there is a noise that he believes happen to be multiple of 4 MHz, which is crystal value it are using today with a 16F84A mcu. I found the information in the datasheet of 16F628A (page 97) on two options for internal clock, 4 MHz and 37 KHz. I got to work with 37 KHZ doing PCON.3 register = 0.
However, latency commands such as PAUSE, SEROUT / SERIN, are compromised.
The idea is to make the mcu control a PLL, the MB1501, so I think the problem of latency should not influence much.
I appreciate your feedback and suggestions.

Pimentel