[DSP-10] Re: S-Meter reading

[Courtney Duncan]

I rewrote

http://cbduncan.110mb.com/HamRadio/Dsp10/rut.html

accordingly.  This puts the proposed metric more in the range of  
interest, which is probably the reason why the VHF and above S-9 is  
"quieter" anyway.

n5bf/6


On Jan 10, 2008, at 7:38 PM, Courtney Duncan wrote:

> That makes more sense than my explanation.  Apparently there is a  
> different S-9 convention on VHF and above than on HF.  There is so  
> much environmental noise on HF that the bar is "higher."
>
> For a -93 dBm S-9, my DSP-10 is right on.
>
> Courtney, n5bf/6
>
> On Jan 10, 2008, at 12:36 AM, f5vkq wrote:
>
>>
>>
>> Hello Courtney, GM and all the best for 2008 from France, F5VKQ,
>> Hermann.!!
>>
>> (ex DC9UP)
>>
>>
>>
>>
>>
>> I am one of the DSP-10 enthusiasts in Europe and in the last years I
>> have been building several DSP-10 (6) for me and my friends.
>>
>> I mainly use one of them for 10GHz EME-work.
>>
>> I also have been in good contacts with Bob and some of the features
>> (at least partly) are out of my mind, but Bob implemented them.
>>
>>
>>
>> Pse take look to the table in the appendix and that's the relation
>> what we use over here in Europe btw dBm (50 Ohm) and S-Meter steps.
>>
>>
>>
>> When I put in 50 uV  I am seeing the same as you see, but according  
>> to
>> the official table here 5,01 uV are -93 dBm and gives me a S9 meter
>> reading on the DSP-10.
>>
>>
>>
>> So, I was not aware of this when measuring around inside the DSP-10.
>>
>>
>>
>> Could it be that Bob also used the European  convention ???
>>
>>
>>
>> 73 de Hermann
>>
>> <S-Meter calib.jpg>
>