[time-nuts] Synthesized Signal Generator query

[Alex Pummer]

that is a relative low noise synthesizer


  Programmed Test Sources PTS 160 Frequency Synthesizer

73

Alex

On 3/7/2019 11:04 AM, Richard (Rick) Karlquist wrote:
>
>
> On 3/7/2019 8:56 AM, Didier Juges wrote:
>
>>
>> The king of low close-in noise are the HP8662 (990MHz) and HP8663 
>> (2GHz?)
>> by about 20dB at 1kHz compared to the 8644A
>>
>> Didier KO4BB
>>
>
> When I worked at Agilent, my lab had a half dozen HP8662's and some 
> 63's.  They were not useful for any kind of high performance clock 
> requirement, unless we divided them down with, for example, a 
> Centellax (now Microchip) divide by 8 to 511 eval board.  That was SOP 
> in those days.
>
> If you just want 100 MHz, there are inexpensive 100 MHz VCXO's
> (about $25 at D/K or Mouser) that will blow the doors off of
> an HP signal generator.  You can phase lock them to a 10 MHz OCXO
> if necessary.  Besides 100 MHz, there are various other frequencies
> available.  See Crystek and Abracon, etc.  These VCXO's put out
> CMOS logic signals, so you have to convert sine to square.
>
> Rick N6RK
>
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