[Elecraft] P3 TX MON envelope display

[Alan]

The modulation monitor is like an oscilloscope in that it triggers on 
the rising edge of the modulation.  So the display is not quite 
continuous - after every sweep it waits for the next positive transition 
before starting the next sweep.

This is especially useful in CW mode so that the rising edge is stable 
on successive sweeps.  The P3 has a unique split-display feature where 
it can show both the rising edge and the falling edge at the same time, 
even when sending slowly.

 > ...  and there are no sweep width/rate adjustments.

The sweep width is adjusted in the "ModScale" menu entry.  (Admittedly 
not a very intuitive name. :=)

Alan N1AL



On 02/03/2016 08:50 AM, GRANT YOUNGMAN wrote:
> The envelope display is not a “snapshot”, but it isn’t quite real
> time either.  Close, but if you’re used to using a scope for
> monitoring, you won’t call it “live”.  Also, the vertical height of
> the display is always normalized to the peak RF signal and there are
> no sweep width/rate adjustments.
>
> I have not experimented with the CW display modes to see how useful
> they are.
>
> My opinion is that the P3 envelope display isn’t a match for a scope,
> and probably wasn’t intended to be.  I do like having the SWR/PWR
> indication on the P3 display, though.
>
> Grant NQ5T K3 #2091, KX3 #8342
>
>
>
>
>> On Feb 3, 2016, at 7:58 AM, Don Wilhelm <w3fpr at embarqmail.com>
>> wrote:
>>
>> Barry,
>>
>> I don't have one, but I have seen them in use.  The envelope
>> display looks like what I see on my analog 'scope. It may be
>> digital, but the refresh rate is fast enough you will not be able
>> to differentiate it from an analog display.
>>
>> 73, Don W3FPR
>>
>> On 2/3/2016 8:26 AM, Barry N1EU wrote:
>>> Can someone with the P3 TX MON please describe the envelope
>>> display in ssb/am modes?  Does it work like a real time
>>> oscilloscope (dynamic) with changing display as you speak or does
>>> it take static snapshots of the RF envelope?  If static, how
>>> often does it update those snapshots?
>>>
>>
>
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