[time-nuts] fast switching quiet synthesizer
GThorp at pascall.co.uk
Wed Oct 8 08:33:24 UTC 2014
It might be worth looking at Holzworth. They make a range of single and multi channel synthesisers covering different levels of phase noise and switching speed.
Date: Tue, 07 Oct 2014 10:02:55 -0700
From: Jim Lux <jimlux at earthlink.net>
To: Discussion of precise time and frequency measurement
<time-nuts at febo.com>
Subject: [time-nuts] fast switching quiet synthesizer
Message-ID: <54341CBF.9080903 at earthlink.net>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
At work, I'm putting together a multichannel stepped frequency CW radar breadboard, and I'm looking for something to serve as a source that I can step quickly.
I'm looking at stepping every millisecond or so. Right now, I use a Ardunino type microcontroller driving a serial DAC driving a VCO, but that's a bit wonky and noisy, although it's easy to get the step timing right on. The spectral purity is, shall we say, downright ugly.
Since I'm going to be doing precision ranging with this, the spectral purity has to be reasonably good (not 1E-15 at 1000 seconds good, fortunately)..
The transfer of any controlled technology contained in or attached to this email is covered by the “Open General Export Licence (Technology for Military Goods)”, granted by the United Kingdom Secretary of State.
The information contained in this email is provided as a personal communication of the sender and, as such, is not binding on Pascall Electronics Ltd unless the intended recipient has been notified by signed postal or fax communication that the sender is authorised to commit Pascall Electronics Ltd on the subject matter concerned. The contents of this email are confidential to the intended recipient at the email address to which it has been addressed. It may not be disclosed to or used by anyone other than this addressee, nor may it be copied in any way. If received in error, please contact Oli Poole, at opoole at pascall.co.uk, quoting the name of the sender and the addressee and then delete it from your system.___
More information about the Time-nuts_lists.febo.com