time-nuts@febo.com
Subject: Re: [time-nuts] filtering a 10Mhz frequency standard?
Date: Dec 13, 2011 10:29 PM
If you are going to buffer the output, why does the filter have to be
passive? Did I miss something here? Today 10MHz is in the realm of
active filters. [Hey, not that I made
Subject: Re: [time-nuts] filtering a 10Mhz frequency standard?
Date: Dec 13, 2011 10:29 PM
If you are going to buffer the output, why does the filter have to be
passive? Did I miss something here? Today 10MHz is in the realm of
active filters. [Hey, not that I made an active filter at 10MHz
- Original Message
From: Discussion of precise time and frequency measurement
time-nuts@febo.com
To: Discussion of precise time and frequency measurement
time-nuts@febo.com
Subject: Re: [time-nuts] filtering a 10Mhz frequency standard?
Date: Dec 13, 2011 10:29 PM
If you are going
: [time-nuts] filtering a 10Mhz frequency standard?
Paul Wade did a paper on 10Mhz GPSDO filtering for Microwave Update in
October. It is in the proceedings. I don't know if it is available
elsewhere.
Bob
On Mon, Dec 12, 2011 at 9:17 PM, li...@lazygranch.com wrote:
I think you would want to avoid
and frequency
measurement time-nuts@febo.com
Sent: Monday, December 12, 2011 10:11 PM
Subject: Re: [time-nuts] filtering a 10Mhz frequency standard?
Paul Wade did a paper on 10Mhz GPSDO filtering for Microwave Update in
October. It is in the proceedings. I don't know if it is available
elsewhere
Not to take anything away from Paul's design, but if you have to buy the
box new, for three bucks more you can get a complete 10.7 MHz LPF with
BNC connectors from MiniCircuits (Model BLP-10.7+, $32.95). They also
have quite a few other useful cutoff frequencies -- 1.9 MHz, 5 MHz, 30
MHz,
...@febo.com
Date: Mon, 12 Dec 2011 17:54:09
To: Discussion of precise time and frequency measurementtime-nuts@febo.com
Reply-To: Discussion of precise time and frequency measurement
time-nuts@febo.com
Subject: [time-nuts] filtering a 10Mhz frequency standard?
What is the best practice
measurementquot; lt;time-nuts@febo.comgt;
Sent: Monday, December 12, 2011 10:11 PM
Subject: Re: [time-nuts] filtering a 10Mhz frequency standard?
Paul Wade did a paper on 10Mhz GPSDO filtering for Microwave Update in
October. It is in the proceedings. I don't know if it is available
elsewhere
I reported a filter design I was working on back in November, using
10 base T LAN filter modules. The first experimental air-wired unit
with two modules got to about -75 dBc at 30 MHz, rising to -65 dBc at 70 MHz.
After building the same circuit with shielded compartments, it ran
about -85
-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On
Behalf Of ed breya
Sent: Tuesday, December 13, 2011 12:07 PM
To: time-nuts@febo.com
Subject: [time-nuts] filtering a 10Mhz frequency standard?
I reported a filter design I was working on back in November, using
10 base T
Yes, you don't want to send un-buffered (or unprotected) signals -
especially right out of a filter - out for distribution. I have found
that some pieces of equipment will only take the external reference
over a certain small level range, so the distribution amplifier needs
to have an
If you are going to buffer the output, why does the filter have to be
passive? Did I miss something here? Today 10MHz is in the realm of
active filters. [Hey, not that I made an active filter at 10MHz.]
Sensitivity is a function of the denominator. The only advantage to a
LPF over a BPF is
...@febo.com
Date: Tue, 13 Dec 2011 13:27:54
To: Discussion of precise time and frequency measurementtime-nuts@febo.com
Reply-To: Discussion of precise time and frequency measurement
time-nuts@febo.com
Subject: Re: [time-nuts] filtering a 10Mhz frequency standard?
If you are going
Come to think of it, you will have more noise if you use a LPF rather
than a BPF, given noise being proportional to the square root of
bandwidth.
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What is the best practice for filtering a 10Mhz sine wave frequency
standard? I've read that you can do more harm than good. Filter
parts (caps, resistors and so on) are all temperature sensitive. But
all those $40 Rb oscillators are putting out a pretty rough looking
sine wave.
Are some types
On 12/12/2011 5:54 PM, Chris Albertson wrote:
What is the best practice for filtering a 10Mhz sine wave frequency
standard? I've read that you can do more harm than good. Filter
parts (caps, resistors and so on) are all temperature sensitive. But
all those $40 Rb oscillators are putting out a
] filtering a 10Mhz frequency standard?
Sent: Dec 12, 2011 5:54 PM
What is the best practice for filtering a 10Mhz sine wave frequency
standard? I've read that you can do more harm than good. Filter
parts (caps, resistors and so on) are all temperature sensitive. But
all those $40 Rb oscillators
.
--Original Message--
From: Chris Albertson
Sender: time-nuts-boun...@febo.com
To: Discussion of precise time and frequency measurement
ReplyTo: Discussion of precise time and frequency measurement
Subject: [time-nuts] filtering a 10Mhz frequency standard?
Sent: Dec 12, 2011 5:54 PM
What
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