Sinisa wrote, in part:
> Connecting and disconnecting your antenna should result
> in noise level difference of 10-12 dB (~2 S units).
Since the AGC within the Orion CANNOT be completely
turned OFF, where should the Threshold be set when
the above test is performed: high or very low?? Selecting
the AGC OFF with the Orion results in a default AGC
Threshold of 0.37 uV, the lowest available setting.
> Anything more than that overloads the receiver unnecessarily.
> Anything less than that reduces the signal to noise ratio.
>
> Start with full sensitivity and reduce it until the above
> condition is satisfied.
With the AGC threshold sitting high or low?
> Orion has 3 sensitivity controls
> which should be reduced in the following order:
> * preamp off;
> * attenuation increased to 6, 12 or 18 dB;
> * RF GAIN reduced.
>
> After this is done, you can adjust AGC THRESHOLD to a suitable
> value,......
[from what value during the above adjutrments?]
> ....which usually means that background noise is comfortably
> audible, but not as strong as usable signals.
73, Jim KH7M
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