I think this is all described in the 1992 FCS papers, but the executive summary is that a direct synthesizer on 9192.63177 is to be avoided at all costs because of the danger of it leaking into the CBT cavity. This is also the reason why you don't multiply up a subharmonic of this frequency. It would also have made the synthesizer a lot more complicated. We multiplied 10 to 320 and then used an SRD to get to 9280 and applied a sideband at 87.36 MHz to it. The 87.36 MHz synthesizer was a phase locked VCXO using a 5th OT crystal.
It took me a long time for me to sell this to Len Cutler. It was pretty advanced for 1989. Rick On 11/4/2016 7:12 PM, paul swed wrote:
Rick on the pll DRO I agree with you for today. So is it built for 9180 and then the 12.63 is mixed with it? Or is it actually a direct PLL precisely at the frequency so not even the synthesizer is used? Regards Paul WB8TSL
_______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
