[time-nuts] Lucent KS-24361 10 Mhz out success.
paulswedb at gmail.com
Wed Dec 3 20:37:59 EST 2014
I agree with your comments.
For the test gear on the bench this will be very fine.
On Wed, Dec 3, 2014 at 7:40 PM, Bob Camp <kb8tq at n1k.org> wrote:
> Be careful when you do this.
> A signal with harmonics 20 db down and sub-harmonics 30 db down will make
> a fine reference input for a counter / signal generator / spectrum analyzer.
> A signal with a 1 second ADEV of 5x10^-10 will look absolutely perfect on
> any spectrum analyzer ever made. It will not be a good a reference for an
> instrument as a source at 5x10^-12.
> Close in phase noise / ADEV is what you need to set up to check. A
> relative test is fine ( divide 10 by 2 and compare to 5), but that’s what
> you need to check
> > On Dec 3, 2014, at 6:04 PM, paul swed <paulswedb at gmail.com> wrote:
> > Have successfully tapped into the clean 10 MHz of the the Lucent and
> > a EL2020 50 Mhz current opamp have a very nice 10 Mhz sine wave out. Any
> > spurs are down at least 43 db. Close in at 4Khz total span or 500 Hz/div
> > don't see anything down to at least 65 db. Thats the best detail the HP
> > 8568B will allow.
> > To get the signal out of the Lucent I sliced the 15 Mhz trace and
> > the 10 Mhz into the SMA output connector.
> > I am sure there are many other amplifiers and methods that could be used
> > but this ones working well and can drive some real coax lengths.
> > Now the really hard part. Mounting it and the power supply into a rack
> > panel.
> > Regards
> > Paul
> > WB8TSL
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