: [Flexradio] DIP OCXO for SDR
Eric,
The VF VCXO listed below has a max frequency at 200 MHz. The XO
currently in use, the VF 161 has a max frequency of 300 MHz. Using a
device at either end of its rated frequency may suffer from precision
and/or accuracy errors.
The Crystek is much
: [Flexradio] DIP OCXO for SDR
I'm traveling for a few days and don't have all my stuff handy, but
Gerald pointed me to a device from (I think) Silicon Industries in Texas
that looks very promising. They have VCXOs up to 400MHz that have some
sort of on-board divider/synthesizer/nco so they can deliver
At 06:50 AM 1/8/2006, John Ackermann N8UR wrote:
I'm traveling for a few days and don't have all my stuff handy, but
Gerald pointed me to a device from (I think) Silicon Industries in Texas
that looks very promising. They have VCXOs up to 400MHz that have some
sort of on-board
-Original Message-
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of Eric Ellison
Sent: Friday, January 06, 2006 4:17 PM
To: 'John Ackermann N8UR'
Cc: [EMAIL PROTECTED]; FlexRadio@flex-radio.biz
Subject: Re: [Flexradio] DIP OCXO for SDR
John
Yes! Gerald HAS really moved a lot of lives
:01 PM
To: 'Eric Ellison'; 'John Ackermann N8UR'
Cc: [EMAIL PROTECTED]; FlexRadio@flex-radio.biz
Subject: Re: [Flexradio] DIP OCXO for SDR
John (and others on this thread)
Magnus - SM4RWI mailed me off list of a Valpey Fisher 200 VCXO offering
with
low phase noise. The VF 960/961. I could not find
: [Flexradio] DIP OCXO for SDR
Eric,
The VF VCXO listed below has a max frequency at 200 MHz. The XO
currently in use, the VF 161 has a max frequency of 300 MHz. Using a
device at either end of its rated frequency may suffer from precision
and/or accuracy errors.
The Crystek is much closer
Let's look at it a different way. You'all with higher math skills
can see if this is a valid approach.
Let's assume the 200 MHz signal 5 nS period) has +/-1 nS
of jitter - very bad FM'ing +/- 40 MHz. If we divide it by 20 to
get 10 MHz, we will still have 1 nS of jitter (assuming a perfect
Eric Ellison wrote:
[ everything trimmed ]
It sounds like there are several groups doing a lot of interesting
things with FGPAs that extend way beyond just frequency stability. I
think that's really great, and thank Gerald for creating such a great
base for creative people to play.
From
At 10:13 PM 1/5/2006, John Kolb wrote:
Let's look at it a different way. You'all with higher math skills
can see if this is a valid approach.
Let's assume the 200 MHz signal 5 nS period) has +/-1 nS
of jitter - very bad FM'ing +/- 40 MHz. If we divide it by 20 to
get 10 MHz, we will still have
? Block diagrams. Designs (not talk!).
Thanks
Eric2
-Original Message-
From: John Ackermann N8UR [mailto:[EMAIL PROTECTED]
Sent: Friday, January 06, 2006 9:16 AM
To: Eric Ellison
Cc: [EMAIL PROTECTED]; FlexRadio@flex-radio.biz
Subject: Re: [Flexradio] DIP OCXO for SDR
Eric Ellison wrote
]; FlexRadio@flex-radio.biz
Subject: Re: [Flexradio] DIP OCXO for SDR
Gentlemen,
The DDS does Direct Digital Synthesis hence the name. It does not
divide
back to anything but runs an phase accumulation engine at 200 MHz (or
whatever
the clock rate) that produces output values to the dac at that rate
: Wednesday, January 04, 2006 5:39 PM
To: John Ackermann N8UR
Cc: [EMAIL PROTECTED]; FlexRadio@flex-radio.biz
Subject: Re: [Flexradio] DIP OCXO for SDR
Gentlemen,
The DDS does Direct Digital Synthesis hence the name. It does not
divide
back to anything but runs an phase accumulation engine at 200
PROTECTED]
Sent: Wednesday, January 04, 2006 5:39 PM
To: John Ackermann N8UR
Cc: [EMAIL PROTECTED]; FlexRadio@flex-radio.biz
Subject: Re: [Flexradio] DIP OCXO for SDR
Gentlemen,
The DDS does Direct Digital Synthesis hence the name. It does not
divide
back to anything but runs an phase accumulation
, 2006 1:49 PM
To: [EMAIL PROTECTED]
Cc: FlexRadio@flex-radio.biz
Subject: Re: [Flexradio] DIP OCXO for SDR
Great plan, John. I only had access to the 5052A for a day, so was
pretty limited in what I could do; it's great that you'll be able to
carry things forward.
The one addition I would
: Thursday, January 05, 2006 1:49 PM
To: [EMAIL PROTECTED]
Cc: FlexRadio@flex-radio.biz
Subject: Re: [Flexradio] DIP OCXO for SDR
Great plan, John. I only had access to the 5052A for a day, so was
pretty limited in what I could do; it's great that you'll be able to
carry things forward
At 04:14 PM 1/5/2006, Eric Ellison wrote:
Folks
Missed you on our Teamspeak session last night It's about time!
Had a good discussion amongst a few people working on both the projects
(Xylo) and Flex. Guess the fantastic Texas - USC entertainment got most
others!
And of course, people on
, January 05, 2006 8:17 PM
To: Eric Ellison; 'John Ackermann N8UR'; [EMAIL PROTECTED]
Cc: FlexRadio@flex-radio.biz
Subject: Re: [Flexradio] DIP OCXO for SDR
At 04:14 PM 1/5/2006, Eric Ellison wrote:
Folks
Missed you on our Teamspeak session last night It's about time!
Had a good discussion amongst
Message-
From: John Ackermann N8UR [mailto:[EMAIL PROTECTED]
Sent: Thursday, January 05, 2006 8:04 PM
To: Eric Ellison
Cc: [EMAIL PROTECTED]; FlexRadio@flex-radio.biz
Subject: Re: [Flexradio] DIP OCXO for SDR
Sorry I couldn't join in the fun; just too many things going on.
TVB's PIC divider
.
-Original Message-
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of John Ackermann N8UR
Sent: Thursday, January 05, 2006 1:49 PM
To: [EMAIL PROTECTED]
Cc: FlexRadio@flex-radio.biz
Subject: Re: [Flexradio] DIP OCXO for SDR
Great plan, John. I only had access to the 5052A
: Thursday, January 05, 2006 10:47 PM
To: Eric Ellison
Cc: FlexRadio@flex-radio.biz
Subject: Re: [Flexradio] DIP OCXO for SDR
I must have missed the change in schedule of the Teamspeak meeting,
is this change permanent?
At 06:14 PM 1/5/2006, Eric Ellison wrote:
Folks
Missed you on our Teamspeak
At 10:11 AM 1/4/2006, [EMAIL PROTECTED] wrote:
The SDR1000 can use clocks between 10MHz and 200MHz so long as when
multiplied by an integer it equals 200 MHz. I use a 10MHz TCXO.
73,
k2ox
However, when you multiply up using the internal VCO, the phase noise takes
a hit. You might wind up
Jim Lux wrote:
At 10:11 AM 1/4/2006, [EMAIL PROTECTED] wrote:
The SDR1000 can use clocks between 10MHz and 200MHz so long as when
multiplied by an integer it equals 200 MHz. I use a 10MHz TCXO.
73,
k2ox
However, when you multiply up using the internal VCO, the phase noise takes
a hit.
[mailto:[EMAIL PROTECTED]
Sent: Wednesday, January 04, 2006 3:16 PM
To: Jim Lux
Cc: [EMAIL PROTECTED]; FlexRadio@flex-radio.biz
Subject: Re: [Flexradio] DIP OCXO for SDR
Jim Lux wrote:
At 10:11 AM 1/4/2006, [EMAIL PROTECTED] wrote:
The SDR1000 can use clocks between 10MHz and 200MHz so long
[EMAIL PROTECTED] wrote:
First of all, any osc multiplied up widens its sidebands
(phase noise) by the multiplication factor and the inverse is
also true. The DDS does a 20X to 200MHz and a divide by 20 to
get back to 10MHz. I guess it's academic at this point how
much jitter is added by the
Gentlemen,
The DDS does Direct Digital Synthesis hence the name. It does not
divide
back to anything but runs an phase accumulation engine at 200 MHz (or
whatever
the clock rate) that produces output values to the dac at that rate.
No division is performed.
Richard W5SXD
John Ackermann
Richard, that's a question I've been meaning to ask someone -- whether
there's any phase noise improvement resulting from the (apparent)
division of the clock signal by the DDS, or whether the output phase
noise is always the same as, or worse than (due to imperfection in the
DDS process), the
: Re: [Flexradio] DIP OCXO for SDR
The SDR1000 can use clocks between 10MHz and 200MHz so long as when
multiplied by an integer it equals 200 MHz. I use a 10MHz TCXO.
73,
k2ox
Isn't the oscillator in the SDR1000 a 200 MHz unit?
http://www.bliley.com/index_005.htm says
forum section created for it.
Thanks
Eric
-Original Message-
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of richard allen
Sent: Wednesday, January 04, 2006 5:39 PM
To: John Ackermann N8UR
Cc: [EMAIL PROTECTED]; FlexRadio@flex-radio.biz
Subject: Re: [Flexradio] DIP OCXO
(sorry, it's not the very best of 73's
;-)
Russell KB8U
From: [EMAIL PROTECTED]
Subject: [Flexradio] DIP OCXO for SDR
To: FlexRadio@flex-radio.biz
Message-ID:
[EMAIL PROTECTED]
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It looks like Bliley at www.bliley.com has single dip OCXO
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