And if the 32 mhz source is a sealed unit, I suspect you will find that once you mechanically set it as close as practical, that varying the Vcc will allow you to use it as a narrow VCO.
Full Name: Lester B Veenstra Job Title: Communication Sys Des Engr Sr Stf Department: 6L01 Site Operations Collaboration and Reach-Back (SOCAR) Company: Integrated Systems & Solutions Business Address: Lockheed Martin IS&S PSC 45 Box 781 APO AE 09468 Telephones: Office 940-6456 Office +44-(0)1423-846-385 Home: +44-(0)1943-880-963 UK Cell +44-(0)7716-298-224 US Cell +1-240-425-7335 Jamaica +1-876-352-7504 -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Behalf Of Magnus Danielson Sent: Saturday, April 21, 2007 7:55 PM To: time-nuts@febo.com; [EMAIL PROTECTED] Subject: Re: [time-nuts] 10MHz to 32MHz? From: "Bruce Lane" <[EMAIL PROTECTED]> Subject: [time-nuts] 10MHz to 32MHz? Date: Sat, 21 Apr 2007 11:26:23 -0700 Message-ID: <[EMAIL PROTECTED]> > Fellow time-clockers, > > I have an interesting (if a bit annoying) situation. I would like to use one of my existing GPS standards to improve stability on one of my HF transceivers. The problem is that said transceiver, for reasons unknown to me, uses a 32MHz reference oscillator. > > The highest GPS-lock frequency I have available is 10MHz. Suggestions for using this to produce a 32MHz reference would be welcome, as my skills for this kind of design are a bit rusty. The most straight-forward fashion is naturally to lock it through a PLL. Highest common comparator frequency is 2 MHz, so divide 10 MHz by 5 and 32 by 16, compare with SR-gate, use either a passive lag or better yeat, and active loop. Three digital ICs and an op-amp. If the 32 MHz reference is a crystal then hooking into the caps for a varicap is easy enought for most hams. Cheers, Magnus _______________________________________________ time-nuts mailing list time-nuts@febo.com https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts _______________________________________________ time-nuts mailing list time-nuts@febo.com https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts