Hi All,
Has anyone been able to figure out the part number and/or measured the
phase noise of the quartz oscillator on board the Motorola M12+T?
This will be an interesting figure to see.
Regards,
Stephan.
___
time-nuts mailing list --
Bruce,
At 11:43 PM + 12/22/08, time-nuts-requ...@febo.com wrote:
Date: Tue, 23 Dec 2008 12:01:40 +1300
From: Bruce Griffiths bruce.griffi...@xtra.co.nz
Subject: Re: [time-nuts] Sub Pico Second Phase logger
To: Discussion of precise time and frequency measurement
time-nuts@febo.com
Points of pride, I'm sure.
-- Dave
Chuck Harris wrote:
And for the ham time-nuts, Hiram Percy Maxim's father invented the
Maxim machine gun. Hiram Percy Maxim invented the firearm silencer.
-Chuck Harris
Brooke Clarke wrote:
Hi:
The original Time Nut, Alfred Loomis (book: Tuxedo
David M. Witten II skrev:
Points of pride, I'm sure.
All this talk still does not make me feel like going out and get a
firearm of any sort, fashinating as they can be in their own right.
If someone got me involved in elk-hunting maybe, but that's about it I
think.
My intent is to get some
Robert Atkinson wrote:
Hi Dave,
Farnell sell the plugs for the Pallisade (I assume you have the selfcontained
antenna/receiver unit). You have to buy the plug houding and contacts
separately. The manual (available online) has the part numbers if you look
carefully). I'm in California at
Magnus Danielson wrote:
My intent is to get some stuff done in the lab during the vacation.
(Desperatly trying to get some more on-topic discussions going).
Here are two questions that have been running around my head:
1. Following on from the discussion last week about trying to
-Original Message-
From: time-nuts-boun...@febo.com
[mailto:time-nuts-boun...@febo.com] On Behalf Of John Ackermann N8UR
Sent: Tuesday, December 23, 2008 8:41 AM
To: Discussion of precise time and frequency measurement
Subject: [time-nuts] New topics (was Re: He is a Time-Nut
John Ackermann N8UR skrev:
Magnus Danielson wrote:
My intent is to get some stuff done in the lab during the vacation.
(Desperatly trying to get some more on-topic discussions going).
Here are two questions that have been running around my head:
1. Following on from the discussion
Robert Atkinson wrote:
Hi Dave,
Farnell sell the plugs for the Pallisade (I assume you have the selfcontained
antenna/receiver unit). You have to buy the plug houding and contacts
separately. The manual (available online) has the part numbers if you look
carefully). I'm in California at
David M. Witten II wrote:
Points of pride, I'm sure.
ABSOLUTELY! Freedom was born of guns.
Tyrants are never willing to give it to you
without a fight.
-Chuck Harris
-- Dave
Chuck Harris wrote:
And for the ham time-nuts, Hiram Percy Maxim's father invented the
Maxim machine gun.
-Original Message-
From: time-nuts-boun...@febo.com
[mailto:time-nuts-boun...@febo.com] On Behalf Of Magnus Danielson
Sent: Tuesday, December 23, 2008 9:26 AM
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] New topics (was Re: He is a Time-Nut
Magnus Danielson wrote:
This diffrential locking technique could be applied to atomic standards,
but then naturally require much improved solution than simple
oscillators. The diffrential locking technique does not magically solve
issues that is typically common mode, such as temperature
John Ackermann N8UR skrev:
Magnus Danielson wrote:
This diffrential locking technique could be applied to atomic standards,
but then naturally require much improved solution than simple
oscillators. The diffrential locking technique does not magically solve
issues that is typically
2. Several measurement techniques require a given phase relationship
(e.g., quadrature) between DUT and reference. For HF frequencies (ie,
5 or 10 MHz) is there a *practical* phase shifter design covering
180+ degrees that doesn't involve switching various lengths of coax
in and out of
Several DDS parts from Analog Devices (e.g. AD9854, which runs quite warm) are
dual quadrature.. And have adjustable phase offsets as well.
I think the single DDS parts also have a programmable phase offset of 14-16
bits. You have to be careful with the configuration bits, so that writing the
Joe
Joe Gwinn wrote:
Bruce,
At 11:43 PM + 12/22/08, time-nuts-requ...@febo.com wrote:
Date: Tue, 23 Dec 2008 12:01:40 +1300
From: Bruce Griffiths bruce.griffi...@xtra.co.nz
Subject: Re: [time-nuts] Sub Pico Second Phase logger
To: Discussion of precise time and frequency
Hal Murray said the following on 12/23/2008 01:58 PM:
2. Several measurement techniques require a given phase relationship
(e.g., quadrature) between DUT and reference. For HF frequencies (ie,
5 or 10 MHz) is there a *practical* phase shifter design covering
180+ degrees that doesn't
John Ackermann N8UR skrev:
Hal Murray said the following on 12/23/2008 01:58 PM:
2. Several measurement techniques require a given phase relationship
(e.g., quadrature) between DUT and reference. For HF frequencies (ie,
5 or 10 MHz) is there a *practical* phase shifter design covering
180+
John Ackermann N8UR wrote:
Hal Murray said the following on 12/23/2008 01:58 PM:
2. Several measurement techniques require a given phase relationship
(e.g., quadrature) between DUT and reference. For HF frequencies (ie,
5 or 10 MHz) is there a *practical* phase shifter design covering
[mailto:time-nuts-boun...@febo.com] On Behalf Of John Ackermann N8UR
Sent: Tuesday, December 23, 2008 12:29 PM
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] New topics (was Re: He is a Time-Nut
Troublemaker)
Hal Murray said the following on
PLL up by a factor of N, use that to drive a DDS, then filter. Maybe
a pair of DDSes will get better tracking.
For each possible phase offset, you need N slots in the table. (N/4
with more work)
If doing phase noise or short term stability measurements, wouldn't
the noise of the DDS
John Ackermann N8UR wrote:
Hal Murray said the following on 12/23/2008 01:58 PM:
2. Several measurement techniques require a given phase relationship
(e.g., quadrature) between DUT and reference. For HF frequencies (ie,
5 or 10 MHz) is there a *practical* phase shifter design covering
Bruce Griffiths skrev:
John Ackermann N8UR wrote:
Hal Murray said the following on 12/23/2008 01:58 PM:
2. Several measurement techniques require a given phase relationship
(e.g., quadrature) between DUT and reference. For HF frequencies (ie,
5 or 10 MHz) is there a *practical* phase
Magnus Danielson wrote:
Bruce Griffiths skrev:
John Ackermann N8UR wrote:
Hal Murray said the following on 12/23/2008 01:58 PM:
2. Several measurement techniques require a given phase relationship
(e.g., quadrature) between DUT and reference. For HF frequencies (ie,
5
Hej Bruce,
See patent US3803499 for one implementation of this scheme.**
Using a quadrature hybrid to combine the two signals and achive the 90
degrees offset is one of several approaches. It is however just a matter
of trigonometry at work.
**However, where possible, a lower noise more
Magnus Danielson wrote:
Hej Bruce,
See patent US3803499 for one implementation of this scheme.**
Using a quadrature hybrid to combine the two signals and achive the 90
degrees offset is one of several approaches. It is however just a matter
of trigonometry at work.
Hej Bruce,
Rephrasing:
A lower noise system with less phase instability due to the variable RF
gain mixer is possible when the phase shift contribution from the
circuit branch including said mixer is small.
Should I interprent this as when the phase shifts near 0, 90, 180 and
270 degrees
On Tue, 23 Dec 2008 17:27:28 +0100, Magnus Danielson
mag...@rubidium.dyndns.org wrote:
David M. Witten II skrev:
Points of pride, I'm sure.
All this talk still does not make me feel like going out and get a
firearm of any sort, fashinating as they can be in their own right.
If someone got me
John,
When you add two (statistically independent) 5 MHz signals and get a 10MHz
signal, the 10 MHz signal's *relative* noise and drift will be the average
of the *relative* noise and drift of the two 5 MHz signals. So as when you
average n signals, the noise and drift are reduced by sq.rt of n,
Didier skrev:
John,
When you add two (statistically independent) 5 MHz signals and get a 10MHz
signal, the 10 MHz signal's *relative* noise and drift will be the average
of the *relative* noise and drift of the two 5 MHz signals.
Not to ruin your analogy here, but what I was discussing on
Magnus Danielson wrote:
Hej Bruce,
Rephrasing:
A lower noise system with less phase instability due to the variable RF
gain mixer is possible when the phase shift contribution from the
circuit branch including said mixer is small.
Should I interprent this as when the phase shifts
Hej Bruce,
Hej Magnus
Thats true, but I had the more general case in mind wherein which one
adds coarse fixed delay increments as required and merely uses the
variable gain mixer to make a fine adjustment to the phase.
How do you intend that to work? Slightly introduce the signal with a
John,
Just so won't feel alone on this list; I, also am a 'shooter' and
have many things that go BANG, besides reverse polarity
electrolytics. I'm a handgun target and combat nut. Of corse I load
all own ammo.
Hadley
K7MLR
At 04:43 PM 12/23/2008, you wrote:
On Tue, 23 Dec 2008 17:27:28
2008/12/24 Had h...@to-way.com:
Just so won't feel alone on this list; I, also am a 'shooter' and
have many things that go BANG, besides reverse polarity
electrolytics. I'm a handgun target and combat nut. Of corse I load
all own ammo.
I only shoot in the shower and load my own ammo.
I've
I've got a very clean late-production HP 8663A signal generator up for sale,
in case anyone is looking. This description page will be posted to eBay
next week unless sold offline first:
http://www.ke5fx.com/8663a.htm
Will be packaged safely for shipment in a wooden crate. Asking $3000, US
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