I’m looking for a solution to the frequency stability problems with the
sdr 1000.
(Dudley did you find it?)
Anyone have a known good highly stable working device for sale?
I’m in the market.
Thanks,
Jimmy
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Lux
Cc: [EMAIL PROTECTED];
FlexRadio@flex-radio.biz
Subject: Re: [Flexradio] Frequency
stability and calibration
Jim Lux
wrote:
There ARE actually sources with better close in phase noise than a quartz crystal, just in case you see one at a hamfest or surplus place (or, you're wealthy enough
Jim Lux wrote:
There ARE actually sources with better close in phase noise than a quartz
crystal, just in case you see one at a hamfest or surplus place (or, you're
wealthy enough). A hydrogen maser, for instance (that's what we use at
work, JPL, when we're concerned about such things..
@flex-radio.biz
Subject: Re: [Flexradio] Frequency
stability and calibration
Jim Lux wrote:
There ARE actually sources with better close in phase noise than a quartz crystal, just in case you see one at a hamfest or surplus place (or, you're wealthy enough). A hydrogen maser, for instance
PROTECTED]]
On Behalf Of Tom Clark, W3IWI
Sent: Thursday, November 24, 2005
1:30 AM
To: Jim Lux
Cc: [EMAIL PROTECTED];
FlexRadio@flex-radio.biz
Subject: Re: [Flexradio] Frequency
stability and calibration
Jim Lux wrote:
There ARE actually sources with better close in phase noise than a quartz
At 05:29 PM 11/22/2005, [EMAIL PROTECTED] wrote:
Hello Flexers,
I did a freq cal four days ago and have checked it
everyday since. Here is what I see on my SDR, -1Hz to +2Hz.
Also a comment about the Rubidium, Cesium and Crystal oscillators.
Oscillators are characterized by short term(phase
Hello Flexers,
I did a freq cal four days ago and have checked it
everyday since. Here is what I see on my SDR, -1Hz to +2Hz.
I'm using the 1 Watt SDR and I leave it and the PC powered on
at all times.
I cal by setting the mode to AM and the filter to 25Hz using the
Spectrum display this
[EMAIL PROTECTED] said the following on 11/22/2005 08:29 PM:
Also a comment about the Rubidium, Cesium and Crystal oscillators.
Oscillators are characterized by short term(phase noise) and long
term(drift) freq stability. The phase noise it what concerns us
most when it comes to receiving.
.
Regards,
k2ox
-Original Message-
From: John Ackermann N8UR [mailto:[EMAIL PROTECTED]
Sent: Tuesday, November 22, 2005 9:09 PM
To: [EMAIL PROTECTED]
Cc: FlexRadio@flex-radio.biz
Subject: Re: [Flexradio] Frequency stability and calibration
[EMAIL PROTECTED] said the following on 11/22/2005 08:29
Can I request that solving the stability issue of
the SDR1000 be brought towards the top of the "to-do" pile.
Having to recalibrate regularly is becoming a
chore.
Also it may be my calibrating techniques, but I
notice that the calibration settings using spectrum and
panadadapter
are
At 02:25 PM 11/21/2005, richard allen wrote:
Ross,
One thing you need to remember
is that the fft bin widths will greatly effect sub 20 Hz accuracy that
you are looking for. Also, the pixel width in the display,
indicating the cursor position, may be many Hz. Of course the sound
card may be
I completely agree with the external oscillator software fix for offset
and I even use it for experiments where I am tuned to 10 Mhz. I can't
figure out how to keep the reference tuned and the signal of interest
tuned with the single IF! Please fix my ignorance.
Bob
Jim Lux wrote:
At
: [Flexradio] Frequency
stability and calibration
Ross,
One
thing you need to remember is that the fft bin widths will greatly effect sub
20 Hz accuracy that you are looking for. Also, the pixel width in the
display, indicating the cursor position, may be many Hz. Of course
.
**
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]] On Behalf Of Guy Atkins
Sent: Sunday, November 20, 2005
12:45 AM
To: FlexRadio@flex-radio.biz
Subject: Re: [Flexradio] Frequency
stability
This site, which I've had bookmarked for a long time,
offers low-priced 10
Hi Eric --
Yes, the Reflock II is now shipping as a kit, though it requires fairly
fine-pitch SMD soldering. We'll have an assembled and tested version
available as soon as we can get the contract manufacturer lined up.
I've done some tests of the Reflock II using a GPS 1pps steering an eBay
'; FlexRadio@flex-radio.biz; Steven Bible
Subject: Re: [Flexradio] Frequency stability
Hi Eric --
Yes, the Reflock II is now shipping as a kit, though it requires fairly
fine-pitch SMD soldering. We'll have an assembled and tested version
available as soon as we can get the contract manufacturer
At 05:15 PM 11/19/2005, Ross wrote:
Bob,
(and others)
Would making up a 10mhz refence standard and using GPS based timing,
improve the frequency stability of the SDR1000.
If so, suggestions please as to where to obtain or build up a precision
standard.
There's been a bit of discussion about this
; Steven Bible
Subject: Re: [Flexradio] Frequency stability
Hi Eric --
Yes, the Reflock II is now shipping as a kit, though it requires fairly
fine-pitch SMD soldering. We'll have an assembled and tested version
available as soon as we can get the contract manufacturer lined up.
I've done
Bob,(and
others)
Would making up a 10mhz refence standard and
usingGPS based timing, improve the frequency stability of the
SDR1000.
If so, suggestions please as to where to obtain or
build up a precision standard.
Thanks
Ross
ZL1WN
storefront or a cottage
industry run out of an amateur operator's home.
Guy
Atkins
Puyallup,
WA
-Original Message-From: Ross
[mailto:[EMAIL PROTECTED]Sent: Saturday, November 19, 2005 5:16
PMTo: FlexRadio@flex-radio.bizSubject: [Flexradio]
Frequency stability
Bob
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