Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On
Behalf Of Bob Camp
Sent: sábado, 25 de febrero de 2012 23:55
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] Morion MV89A Repair
Hi
The spectrum you show in the middle
2012 23:55
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] Morion MV89A Repair
Hi
The spectrum you show in the middle is the correct one. It shows the 10 MHz
output and the sub-harmonics related to the 5 MHz crystal oscillator. The
other two are a bit broken
: [time-nuts] Morion MV89A Repair
Roberto
It is called tens of years of experience Bert Kehren
In a message dated 2/27/2012 5:16:28 A.M. Eastern Standard Time,
rbarri...@msn.com writes:
Hi Bob,
I wonder what the other oscillators that others are receiving look like in
the SA. Replacing all
] Morion MV89A Repair
Hi
The spectrum you show in the middle is the correct one. It shows the 10 MHz
output and the sub-harmonics related to the 5 MHz crystal oscillator. The
other two are a bit broken. One appears to have a stage oscillating. The
other is more interesting. It has a stage
: Neville Michie namic...@gmail.com
To: Discussion of precise time and frequency measurement
time-nuts@febo.com
Subject: Re: [time-nuts] Morion MV89A Repair
Message-ID: 2568f2a2-4de2-4dbc-a711-f93c56c21...@gmail.com
Content-Type: text/plain; charset=US-ASCII; delsp=yes; format=flowed
Hi,
I have two
Hi
The paper mentions HC-40 crystals. They probably have the crystal drive current
cranked down to optimize short term stability at 1 sec and longer. The phase
noise floor takes a back seat.
The other interesting thing in the paper is that the short term numbers shown
aren't into parts in the
On 02/26/2012 05:20 PM, Bob Camp wrote:
Hi
The paper mentions HC-40 crystals. They probably have the crystal drive current
cranked down to optimize short term stability at 1 sec and longer. The phase
noise floor takes a back seat.
The other interesting thing in the paper is that the short
Is this the paper you are speaking of?
Google: Optimization of Drive-Level in High Stability Low-Noise OCXOs
Thomas Knox
From: li...@rtty.us
Date: Sun, 26 Feb 2012 11:20:16 -0500
To: time-nuts@febo.com
Subject: Re: [time-nuts] Morion MV89A Repair
Hi
The paper mentions HC-40
The other interesting thing in the paper is that the short term numbers
shown aren't into parts in the 13th.
The ADEV plot in figure 3 doesn't exactly show the oscillator in its best
light. The right side of the 'bathtub' is well beyond 1000 seconds with
these parts, if you actually let them
-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-
boun...@febo.com] On Behalf Of Tom Knox
Sent: Sunday, February 26, 2012 9:41 AM
To: time-nuts@febo.com
Subject: Re: [time-nuts] Morion MV89A Repair
Is this the paper you are speaking of?
Google
I wonder how Wenzel looks at drive level, they seem to have their products
dialed in.
Thomas Knox
From: jmi...@pop.net
To: time-nuts@febo.com
Date: Sun, 26 Feb 2012 12:48:26 -0800
Subject: Re: [time-nuts] Morion MV89A Repair
-Original Message-
From: time-nuts-boun
Hi
Most people put the best of the batch in the paper. It is indeed odd that the
very experienced authors of the paper did not do so. With low drive a 5 MHz
HC-40 should get into parts in the thirteenth over much of the bathtub region.
Bob
On Feb 26, 2012, at 3:22 PM, John Miles
Hi all,
I spent this evening repairing a MV89A that had a weak output, output cap
was bad:
http://www.rbarrios.com/projects/MV89A
I also found while comparing with other two MV89A's that they show different
output spectra, as can be seen. Test conditions were identical but one
appears
Hi
The spectrum you show in the middle is the correct one. It shows the 10 MHz
output and the sub-harmonics related to the 5 MHz crystal oscillator. The other
two are a bit broken. One appears to have a stage oscillating. The other is
more interesting. It has a stage oscillating that is
-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-
boun...@febo.com] On Behalf Of Bob Camp
Sent: Saturday, February 25, 2012 2:55 PM
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] Morion MV89A Repair
Hi
The spectrum you
:
-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-
boun...@febo.com] On Behalf Of Bob Camp
Sent: Saturday, February 25, 2012 2:55 PM
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] Morion MV89A Repair
Hi
The spectrum you show in the middle
, February 25, 2012 2:55 PM
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] Morion MV89A Repair
Hi
The spectrum you show in the middle is the correct one. It shows the 10
MHz
output and the sub-harmonics related to the 5 MHz crystal oscillator. The
other two
25, 2012 2:55 PM
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] Morion MV89A Repair
Hi
The spectrum you show in the middle is the correct one. It shows the 10
MHz
output and the sub-harmonics related to the 5 MHz crystal oscillator. The
other two
Are the specs at 5 MHz or at 10? They should be 6 db worse at 10 than at
5.
Now that I'm looking back at the data sheet posted with the auction, they
were indeed specified at 5 MHz. But even after the 6 dB penalty, their spec
limits versus their real-world numbers are pretty marginal.
Morion
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