[time-nuts] newcomer

SAIDJACK at aol.com SAIDJACK at aol.com
Mon Sep 15 12:51:29 EDT 2014


Hi Stephanie,
 
I have a similar issue, I can never tell if my messages post or not, some I 
 get back instantly others never show up in my inbox. I think the mail 
server was  just updated.. 
 
To answer your questions:
 
1) attached is the PN plot of the 1.0GHz version.
 
2) Here is a datasheet for the part:
 
   http://www.jackson-labs.com/index.php/products/uln_1g
 
The tricky part in your proposed setup will be getting a 100MHz crystal  
with low enough phase noise so that the 20log(N/M) added phase noise won't be 
a  problem - +20dB added after all.
 
On our part some of the tricky design issues were size and power as well as 
 the high output power of +22dBm, and a requirement to maintain the output  
power to within 0.5dB over the entire -40C to +85C temperature range.
 
bye,
Said
 
 
In a message dated 9/15/2014 09:40:37 Pacific Daylight Time,  
steph.rey at wanadoo.fr writes:

Hi,

It sounds like all my messages need moderator  approbation. Is it the 
rule on the list or a technical problem at my side  ?
Cheers
Stephane



On Mon, 15 Sep 2014 09:17:01 -0700,  Said Jackson via time-nuts 
<time-nuts at febo.com> wrote:
> Hi  Stephanie,
>
> Welcome to the list!
>
> We designed a  1GHz crystal LO for PLLs (the ULN-1G) using an off the
> shelf miniature  500MHz crystal oscillator which is run at 3 rd
> overtone internally  then using a diode doubler and a steep bandpass
> filter using several  Mini Circuits ceramic filters and a 20dBm amp.
>
> Works like a  charm and has phase noise very close to theoretical..
>
>  Bye,
> Said
>
> Sent From iPhone
>
>> On Sep  15, 2014, at 5:50, "steph.rey" <steph.rey at wanadoo.fr>  wrote:
>>
>> Hi the list,
>>
>> Just  wanted to introduce myself for my 1st message.
>> I'm Stephane, 40,  living in France, at the moment working in RF & 
>> electronics  for a particles accelerator lab. I'm hamradio as well, and 
>> I do  enjoy especially weak and accurate signals.
>> I'm desiging various  RF circuits. Current design is a universal PLL 
>> able to operate  from 0.5 to 6 GHz depending on the VCO and supposed to 
>> be  "low-jitter" (<1ps) regarding the application.
>> I'm also  starting a new design of low noise PLL and there will be 
>> probably  a lot of question arising... I'm starting with the 1 GHz LO 
>> made  upon a 100 MHz VCXO + multipliers/filters/MMICs.
>> I want to focus  deeper on low phase noise/jitter, synchronization 
>> and low-noise  PLL techniques.
>> I believe this is a good place for most of these  topics.
>>
>>
>> Cheers
>>  Stephane
>>
>>
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