and frequency measurement time-nuts@febo.com
Sent: Sunday, 28 June, 2009 11:04:49 PM
Subject: Re: [time-nuts] GPSDO project
Hal Murray wrote:
You want 66. MHz from 10 MHz.
I can think of several approaches.
1) Patch the radio stuff to work with 10 MHz. Since 10 MHz is common from
things like GPSDOs
Hi Luis,
Are kits available again for your design?
73's
Nic
VK2KXN / VK5ZAT
Subject: Re: [time-nuts] GPSDO project - 66.667MHz from 10MHz
Both for locking with a 10MHz or 1pps you have a
single chip solution using one of my reflock designs.
http://w3ref.cfn.ist.utl.pt/cupido/reflock.html
for your design?
73's
Nic
VK2KXN / VK5ZAT
Subject: Re: [time-nuts] GPSDO project - 66.667MHz from 10MHz
Both for locking with a 10MHz or 1pps you have a
single chip solution using one of my reflock designs.
http://w3ref.cfn.ist.utl.pt/cupido/reflock.html
For a 1pps lock of fractional 1/3
Many thanks to all who responded to my request for help on this project.
The SDR-IQ (http://www.rfspace.com/SDR-IQ.html) already has a built-in
66.6667 MHz osc, I just want to make it more stable and reasonably
accurate, as I use it as a general coverage HF receiver with a one-
Hertz
Consider a 2nd hand low phase noise source like a
PTS-160.
Best regards,
Xtof.
Brad Dye wrote:
Many thanks to all who responded to my request for help on this project.
The SDR-IQ (http://www.rfspace.com/SDR-IQ.html) already has a built-in
66.6667 MHz osc, I just want to make it more stable
Hi Brad.
Just catching up with this, after a hot weekend, and doing White Van
Man impressions on (an even hotter) M1 this morning...
Personally, I wouldn't bother with any high accuracy clock/oscillator
for the SDR, unless you can also synch the AD sampling clock in the
soundcard. As that will
Does anyone have a Reflock that they would sell me?
Best regards,
Brad Dye
K9IQYom
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Dave Baxter wrote:
Personally, I wouldn't bother with any high accuracy clock/oscillator
for the SDR, unless you can also synch the AD sampling clock in the
soundcard.
The SDR-IQ, SDR-14, Qs1r, Perseus and the HPSDR project do not rely on a sound
card ADC to sample any signals.
The RF
Hello Brad,
VE1ALQ has them. He will also make VCXO's. Do a google search for his
webpages.
He sells the kits as well as the assembled units.
By far easier to get a PTS or Fluke sysnthesizer.
Stan, W1LE
Brad Dye wrote:
Does anyone have a Reflock that they would sell me?
Best regards,
I have just purchased a Thunderbolt GPS receiver. I hope to use this
to discipline an oscillator on 66.6 MHz so I can use it as a LO on
my Software Defined Receiver (SDR-IQ).
Building such an oscillator is a little over my head so I thought I
would ask the group if anyone knows where I
In a message dated 28/06/2009 20:34:25 GMT Daylight Time, b...@braddye.com
writes:
I have just purchased a Thunderbolt GPS receiver. I hope to use this
to discipline an oscillator on 66.6 MHz so I can use it as a LO on
my Software Defined Receiver (SDR-IQ).
Building such an
Additional suggestions, for short term realization, and cost effective:
PTS synthesizer that will cover the desired freq, Programmed Test
Sources are common on Ebay.
Can use an external 10 MHz reference. Get one with front panel knobs
(setability).
Possibly a FLUKE model 6061B synthesizer,
You want 66. MHz from 10 MHz.
I can think of several approaches.
1) Patch the radio stuff to work with 10 MHz. Since 10 MHz is common from
things like GPSDOs or Telco surplus rubidium clocks, somebody may have done
that already.
2) Build a PLL. The first step is probably to find a
Hal Murray wrote:
You want 66. MHz from 10 MHz.
I can think of several approaches.
1) Patch the radio stuff to work with 10 MHz. Since 10 MHz is common from
things like GPSDOs or Telco surplus rubidium clocks, somebody may have done
that already.
2) Build a PLL. The first step is
of precise time and frequency measurement time-nuts@febo.com
Sent: Sunday, 28 June, 2009 11:04:49 PM
Subject: Re: [time-nuts] GPSDO project
Hal Murray wrote:
You want 66. MHz from 10 MHz.
I can think of several approaches.
1) Patch the radio stuff to work with 10 MHz. Since 10 MHz
Hi Brad,
I am a little confused about your intentions. There is no mention on the
RFspace
web site about a provision of being able to feed in an external reference signal
to the SDR-IQ or the SDR-14 for that matter.
If you study the Analog devices AD6620 component, you will see that it is a
GPSDO project
Brad Dye brad at braddye.com
Sun Jun 28 19:33:14 UTC 2009
I have just purchased a Thunderbolt GPS receiver. I hope to use
this to discipline an oscillator on 66.6 MHz so I can use it
as a LO on my Software Defined Receiver (SDR-IQ).
Building such an
TI, AMD National all make synthesizer chips which
would work nicely. The problem is that they all charge
$$$ for the evaluation kits, which would kake a very
handy way to use them. Maybe you can sweet talk
your local salesman into a freebie?
Pete Rawson
TI, AMD National all make synthesizer chips which would work nicely.
What sort of phase noise and/or spurs do they have? (relative to a good/OK
crystal)
Do the data sheets have good info?
--
These are my opinions, not necessarily my employer's. I hate spam.
June, 2009 11:55:46 PM
Subject: Re: [time-nuts] GPSDO project
Hi Brad,
I am a little confused about your intentions. There is no mention on the
RFspace
web site about a provision of being able to feed in an external reference signal
to the SDR-IQ or the SDR-14 for that matter.
If you study
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