How about using the 10811 from your broken Z3801A?
Adrian
Jim Sanford schrieb:
Bob:
Thanks.
You correctly anticipated that I will use this to lock a 100 MHz
Oscillator, and either multiply or lock from there. (I'm considering
a VCXO at 1GHz as well, it would either be locked to 100 MHz or 10
Mhz. Haven't decided yet, also considering multiplying up to 1000 and
then from there to 2Ghz, 3Ghz, and 5. Haven't decided about 10 Ghz yet.
Appreciate the info. The units on ebay are cheaper than the VCXO I
was considering (first time I looked, they were more), so will
probably just do that.
Thanks again,
Jim
[email protected]
On 6/28/2013 10:07 AM, Bob Camp wrote:
Hi
On Jun 28, 2013, at 9:45 AM, Jim Sanford <[email protected]> wrote:
All:
My Z3801 no longer works, and I've not been able to get any new
ideas on it, so am looking for a replacement.
I've come across a nice 10 MHz that has very good phase noise
(-145db or so at 10 KHz offset), but costs $175 in single quantities
(digi-key, I think.)
The OCXO in the TBolt is about -165 at 10 KHz
I was considering using one of W1GHz's boards to lock it to a
jupter GPS engine that I already have. Several people have told me
this is overkill, recommending the Thunderbolt.
I've read that there are various OXCXs used in Thunderbolts, some
OK, some not so good.
Looking on ebay right now, I see a Nortel Trimble NTBW50AA, a
Symmetricom, NTBW50AA, and another Nortel.
Does anybody have experience with these?
Yes
I'm particularly interested in the best phase noise I can get.
Spurs are what will kill you.
Phase noise is about 10 db worse than the TBolt far removed. It's
similar close in.
This will be station master frequency reference, and will
ultimately lock stations up to 10 GHz.
Simple answer is to run a clean up oscillator at 100 MHz and then go
from there. None of the GPSDO's have low enough spurs to really do an
excellent jobs at 10 GHz.
Bob
Thanks & 73,
Jim
[email protected]
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