A potential new failure mode was discovered, wherein if you happened to accidentally enter a grossly incorrect calibration reference frequency in the configuration screen, you could burn two of the BS170s. For example if you meant to enter 25,000,002 but accidentally wrote 2,500,002 then the Si5351A configuration could not succeed, resulting in a DC output on the Si5351A pins, putting one pair of BS170s 100% on (high current) and the other pair 100% off (no current).?
To resolve this 1_01b now does a check to make sure that the entered frequency is 25MHz?+/- 1kHz. Outside this range, it would be ignored.?
This is a minor non-essential upgrade, just another protection against a possible?failure mode.?
