On Thu, Dec 2, 2021 at 08:52 PM, Dave Peterson wrote:
Why does switching 2ns/1ns push buttons change the 2ns output at all!? Given
the schematic for the 10ns Amplifier input U450C.
S350-1 and S350-2 are closed in the 1-2-5 ns position.
With collector of Q270 low (Out of Lock filter), S450B (2ns) connects Marker Out to C515 (2ns signal) via K450-S1 K450.
With 1 ns button depressed, K450-S1 opens that link, reducing and changing load on 2ns filter output and 2ns filter is coupled only to 1ns filter.
Raymond
Raymond Domp Frank