Quote:
Originally Posted by vts1134
So B1 IS the afc and adjusting it adjusts the horizontal frequency?
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B1 adjusts the oscillator's frequency.
B1 is not the AFC.
The term AFC (automatic frequency control) is a bit misleading as it's used here, because it does not control frequency; it controls
locking action, locking the oscillator to the incoming sync signal once the oscillator is close enough to be "grabbed" and locked in. A better term might be "automatic lock control" or "automatic hold control".
As mentioned before, the oscillator can be running at an entirely
different frequency and still be grabbed and locked to the sync signal, which appears to be the case in that last screen shot.