[K3CAL] Any oscope and signal analysis experts?

[Charlie Lumadue]

flat tops could be  over drive. Back off mic and see if the flat tops go
away.

On Sun, May 15, 2016 at 4:37 PM, David Metler <halltrailfab at gmail.com>
wrote:

> Thank you Rich.  That is good info.  I ll try the free tone generator at
> 1khz.     Im using an ameritron al80b.  The odd thing is...i get a better
> form using the amp then I do just the FTDX3000.   Maybe because I have the
> ALC set correctly with the amp.  I guess once I get the hang of
> things...maybe I can adjust the sound settings on the transceiver.  They
> are all on default currently and I dont use any compression.  .
>
> On Sun, May 15, 2016 at 10:35 AM, Rich Weaver <weaverr at comcast.net> wrote:
>
>> It looks like (to me) your RF signal is in good shape.
>> A simple and basic way to check is to apply a single tone about 1KHz.
>> It can be an audio tone thru a microphone.
>> Make sure your audio compression is off. There are many settings
>> on the FTDX-3000 to compensate for your voice.
>> As we all know the idea is not to overdrive your audio on the radio.
>> As stated there is good information in the ARRL handbook.
>>
>> I’m not sure what kind of RF amplifier you are using but some amps
>> have a switch so you can change the bias and run Class C as well as Class
>> AB1 or AB2.
>> Class C is for A.M. , F.M. and CW modes. Some amplifier instructions for
>> tune up is
>> to put a CW (carrier signal) and adjust the amplifier. Once completed the
>> tune up put the
>> switch back in the SSB mode.
>> Class AB is for SSB and linear compared to Class C.
>>
>> Rich-WW3ZZ
>>
>>
>>
>> *From:* David Metler <halltrailfab at gmail.com>
>> *Sent:* Saturday, May 14, 2016 1:49 PM
>> *To:* Calvert Amateur Radio Association - K3CAL <k3cal at mailman.qth.net>
>> *Subject:* Re: [K3CAL] Any oscope and signal analysis experts?
>>
>>
>> Pic didn't attach
>> On May 14, 2016 1:48 PM, "David Metler" <halltrailfab at gmail.com> wrote:
>>
>>> I have gotten great reports on my audio with amplifier...but as a
>>> learning exercise...I connected my oscope to my rf output to see what my
>>> signal looked like..in some cases with no amplifier..it looks like my audio
>>> flat tops.  But I don't know how to correct that with my ftdx 3000.  Here
>>> is a video of the audio sampled with amplifier putting out  600 watts.  And
>>> a freeze Fram pic that does look good.
>>>
>>> One thing that I'm not sure about is if I have my oscope settings
>>> correct...as I really have know idea what I'm doing lol.  Hopefully you can
>>> see some of the settings in the freeze frame. I'm connected to an unused
>>> antenna output (antenna #2)on an ameritron atr 30 tuner and transmiting on
>>> antenna 1.  Basically just using the coupling effect to sample the rf..with
>>> out  having to make or buy an rf sampler.
>>>
>>> What do you all think?
>>>
>>> https://youtu.be/BP3sy4dx6oM
>>>
>> ------------------------------
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>
>
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