[TenTec] Orion 1 and/or 2, Manual Notch Outside AGC Loop?

[Merle Bone]

Scott said:
"The manual notch is outside of the receiver's AGC loop. The result is that
notching a strong CW signal leaves the desired weak CW signal in the mud
because the AGC voltage is derived from the stronger signal. Firmware CANNOT
fix this problem."
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The V1 code manual notch for the Orion does remove the carrier from
the passband and therefore it does not effect the AGC. The change
in the V2 code was a decision by Ten-Tec. The logic was never made clear.
There was a "comment" from Ten-Tec about noise, but the ARRL tests
with the Orion were with V1 code - with the notch removing the carrier - and
the ARRL found NO noise issues. Frankly, the Notch change seemed to be
more associated with Ten-Ten using some of the DSP code design from
the Jupiter for the Orion II and less about any "side effects."
73, Merle - W0EWM