[AMRadio] Rtrouble Brewing in AM Window


Bry Carling bcarling at cfl.rr.com
Wed Dec 11 21:32:17 EST 2013


Thanks Larry yes I will go for that method and the simple envelope display.

Bry Carling
http://af4k.com
Sent with my iPhone 6


> On Dec 11, 2013, at 8:58 PM, Larry Szendrei <ne1s at securespeed.us> wrote:
> 
>> On 12/11/13 7:19 PM, Bry Carling wrote:
>> I sure wish I understood how to connect my oscilloscope to look at the waveforms. I guess it's the horizontal sweep input that confuses me.
> Hi Bry,
> 
> If you just want to monitor the envelope pattern, which is all I've ever done, use the scope's internal sawtooth sweep generator set to a time scale appropriate for viewing an audio waveform. Just looked at my scope, I have been using 500us/cm.
> In this case, nothing is connected to any external horizontal input.
> 
> If you want to view the trapazoid, connect the scope's horizontal input to a sample of your audio, and don't use any horizontal sweep. Someone here mentioned a while back that you want to sample it as early in the chain as possible. Can't speed from experience here, as I've only ever used the envelope pattern.
> 
> 73,
> -Larry/NE1S
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