[DSP-10] alt-V

[Courtney Duncan]

Hi Mike, this was helpful.  I've used Ctrl-V to turn down the gain a 
little.  That helps in my situation.

I'm not trying to peak something here, I just have a lot of 
neighborhood noise and find that it is useful to point the beam where 
I don't see a lot of it at the present moment.  That is often more 
helpful for readability than pointing the beam at the desired signal.

What I was originally asking was about a possible additional feature 
in P2T and now that I've read the directions, another comes to mind.

First, would it be possible rather than toggling between tone and 
through-audio, to play them both at the same time?  This way you 
could hear what you were doing, in addition to the P2T tone.

Also, I note that the gain is in Hz/dB.  I don't know if this is 
common practice, like in the V2F converters you mention, but Hz/dB is 
a semi-log comparison.  The human ear (speaking musically) hears 
frequencies logarithmically.  An octave, for instance, is a factor of 
two in frequency.  It might make more sense to have P2T operate in a 
log-log like way.  Gain would be specified at Octaves/dB, for 
instance.  I think one octave (doubling in frequency) for every 10 dB 
might actually be more useful than what we have now.

Of course, both methods (semi-log and log-log) are monotonic, so for 
peaking and nulling they work pretty much the same.  log-log would be 
more melodious, though.

These would be software changes.

Courtney, n5bf/6

>http://members.ispwest.com/kd7ts/v380/7P2T.htm
>
>
>Hi Courtney,
>
>Read through the above, if there are more questions, I'll try to help.
>
>An easy thing to try would be to find a birdie on 2 meters, find the 
>audio freq, then set up the ALT-V box so you can peak its heading.
>
>Noise is not very useful without a good noise source, like the sun 
>or even a noise diode etc. Not sure what you have to play with. 
>There are certainly plenty of weak signals to play with on 2 meters.
>
>73 Mike KD7TS
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