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 [email protected] https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
