Re: [Elecraft] dBV reading on Kx3

2017-05-18 Thread Walter Underwood 
To expand on Lyle’s correct answer, the dBV reading is designed to be used as a 
relative measure. Read the description on page 22 of the KX3 manual.

http://www.elecraft.com/manual/E740163%20KX3%20Owner's%20man%20Rev%20C5.pdf 


I think it is really cool that Elecraft documents these internal receiver test 
points. I’m sure they exist in other radios, but they are undocumented, 
factory-only readouts. Does any other rig display PA temp, let alone oscillator 
temp?

Walter Underwood
wun...@wunderwood.org
http://observer.wunderwood.org/  (my blog)


> On May 18, 2017, at 3:43 PM, Lyle Johnson  wrote:
> 
> Nothing meaningful.
> 
> First, read AFV and for a couple of readings to set the reference. Then go to 
> dBV.  dBV will then show you the difference in dB between the current signal 
> and the reference.  On a dummy load it'll bobble around a low value since it 
> is just thermal noise and not a signal you are measuring.
> 
> 73,
> 
> Lyle KK7P
> 
> 
> On 5/18/17 3:37 PM, John Lally wrote:
>> What should the dBV reading on the kx3 when it is connected to a dummy load,
>> the agc is off, and no preamp?
> 
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Re: [Elecraft] dBV reading on Kx3

2017-05-18 Thread Lyle Johnson 

Nothing meaningful.

First, read AFV and for a couple of readings to set the reference. Then 
go to dBV.  dBV will then show you the difference in dB between the 
current signal and the reference.  On a dummy load it'll bobble around a 
low value since it is just thermal noise and not a signal you are measuring.


73,

Lyle KK7P


On 5/18/17 3:37 PM, John Lally wrote:

What should the dBV reading on the kx3 when it is connected to a dummy load,
the agc is off, and no preamp?


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[Elecraft] dBV reading on Kx3

2017-05-18 Thread John Lally 
What should the dBV reading on the kx3 when it is connected to a dummy load,
the agc is off, and no preamp?

 

Mine shows +68.4 dBV

 

John

W7JJL

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