If you GPS-discipline that OCXO, I think it would be more than adequate. Since you've already got the 1 PPS GPS signal, all that should be needed in addition to the OCXO/Si5351 is a little $3 Arduino board (like: http://www.ebay.com/itm/131702108124 ) to program the desired output frequency(s) and perform compensation. $16 for an OCXO ---NICE! ...The whole project maybe $25! On Mon, 6 Jun 2016, Joe Moskalski wrote:
I mentioned this to someone else, QRP Labs has a kit that creates a OCXO around the Si5351 chip. here is the link:
http://www.qrp-labs.com/ocxokit.html
If you couple this with another kit of theirs you can program it it any frequency you want. My only thought is would it be accurate/stable enough.
http://www.qrp-labs.com/progrock.html
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On Mon, Jun 6, 2016 at 11:36 AM, David McGough <kb4fxc@inttek.net> wrote:
Hi Joe,
While on the subject of the Si5351 chips, the application of converting one reference clock to a secondary frequency is what they were designed for. So, since you've already got a GPS reference, this -might- be an inexpensive starting point...For this application, you obviously won't need all the bells and whistles presented in this article! See:
http://www.knology.net/~gmarcus/Si5351/Si5351_VFO_QEX.pdf http://www.knology.net/~gmarcus
Note that I would replace the Si5351 25MHz reference with a decent TCXO (available on ebay, etc.)....Note that I haven't used the Si5351 with an RTCM, there may be simpler/better ways???
73, David KB4FXC
On Mon, 6 Jun 2016, Joe Moskalski wrote:
It seems clear that in order for simulcast to work properly with the RTCM I will need to clock the CPU to the GPSDO. Is there a device available to give you the 9.6 mhz reference from the 10 mhz out from the GPSDO or does anyone have a schematic available so that I can build them myself?
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