Date: Wed, 29 May 2024 21:43:54 +0200
MIME-Version: 1.0
User-Agent: Mozilla Thunderbird
Reply-To: noreply@ademu.com
Subject: Re: Distorted Sine Wave
Content-Language: nl
Newsgroups: sci.electronics.design
References: <v37ncd$17q1d$1@dont-email.me>
From: Arie de Muijnck <noreply@ademu.com>
In-Reply-To: <v37ncd$17q1d$1@dont-email.me>
Content-Type: text/plain; charset=UTF-8; format=flowed
Content-Transfer-Encoding: 7bit
Message-ID: <nnd$1540c445$35e5ece6@6a11785c39b8fb50>
Organization: KPN B.V.
Path: ...!weretis.net!feeder9.news.weretis.net!feeder8.news.weretis.net!news.mixmin.net!feed.abavia.com!abe006.abavia.com!abp002.abavia.com!news.kpn.nl!not-for-mail
Lines: 18
Injection-Date: Wed, 29 May 2024 21:43:54 +0200
Injection-Info: news.kpn.nl; mail-complaints-to="abuse@kpn.com"
Bytes: 1534

On 2024-05-29 19:07, Cursitor Doom wrote:
> Gentlemen,
> 
> Whilst fault-finding on my HP 8566B spectrum analyzer, I've found the
> 10Mhz reference oscillator is generating an 'unsatisfactory waveform'
> which may be causing the device to be unable to lock it's main PLL.
> I've come across this waveshape before, but mostly with oscillators I was
> building and in the process of trying to iron out the wrinkles of and
> certainly NOT a critical reference oscillator from a respected
> manufacturer. Can anyone tell what's most likely going on here?
> 
> https://disk.yandex.com/i/z6fYbeVfPRK7aA


Looks like reflections in the cable. Try the 50 Ohm termination.

Arie