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Re: LF: Softrock RX divider IC problem, unexpected frequency out

To: [email protected]
Subject: Re: LF: Softrock RX divider IC problem, unexpected frequency out
From: Claudio Pozzi <[email protected]>
Date: Sat, 27 Jan 2018 10:33:43 +0100
In-reply-to: <[email protected]>
References: <[email protected]> <CAA8k23RYAbGQSBVNMyxdViOKpmpUnOg4a_Rk08Ej_nOqSU9BAw@mail.gmail.com> <[email protected]>
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On Friday 26 January 2018 19:36:17 you wrote:

> I just completed two scope measurements at R17 to pin 3 of the divider

> IC. One of the faulty LF Softrock, and one on my MF one that works

> fine. the resultant wave forms are quite different. But I am not

> clever enough to say if they hold the clue, so will post them here.

> Thanks again.

>

> Faulty LF oscillator or divider first

>

> http://www.gatesgarth.com/R17-to-pin3.jpg

>

>

> Working MF Softrock, same place

>

> http://www.gatesgarth.com/mf-R17-to-pin3.jpg

 

The scope is DC or AC coupled? I see a negative low level in both printout.

 

73

Claudio ik2pii




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