Hi,
I'm about to implement a PLL for a 24.576 MHz VCXO using the phase-frequency
detector (PC2) of the NXP 74HCT9046A. From the datasheet
(www.nxp.com/documents/data_sheet/74HCT9046A.pdf) it is not clear to me what
the maximum operating frequency for this phase detector is--from the enable and
On Thu, 24 Apr 2014 09:41:44 +0100 (BST)
sg sg micpre...@yahoo.de wrote:
I'm about to implement a PLL for a 24.576 MHz VCXO using the phase-frequency
detector (PC2) of the NXP 74HCT9046A. From the datasheet (www.nxp.com
/documents/data_sheet/74HCT9046A.pdf) it is not clear to me what the
Chris
I am not sure if you want to measure temperature or control a fan. To
measure there are many options depending on how much money you want to spend.
To control I suggest either a LM 335 or a NTC resistor. I have worked
extensively with both and for measuring I have now downsized to a
Hello Samuel,
Well, I just got done designing and building the very same thing. If I
recall correctly it is the same as the HC4046 which is 4 MHz. The 9046
VCO will only go up to 20 MHz absolute maximum. So you will need an
external oscillator and dividers.
BillWB6BNQ
sg sg wrote:
My feeling has always been that PC2 is most appropriate for very
wide-bandwidth (most of an octave or more) VCO's. I have used it at both
audio and in 1-2MHz region with success.
For 24.576 MHz VCXO, the fractional change in frequency will be in multiple
ppm not octaves, and I would naturally
Affected Products: Jackson Labs or Symmetricom time/frequency reference
boards based on Symmetricom chip scale atomic clock, most common unit is the
CSAC GPSDO sold by both symmetricom vendors and direct from Jackson labs
Type of issue: Short and Long-term reliability, mfr couldnt assure that
Jarl,
Thank you for your help on this. It appears that either; the CPU has a bad
output pin, some unknown command has turned the heater off, or the firmware
is programmed that way. The 10 MHz frequency had always been very 'stable',
and I didn't know there was a problem until I bought a 2nd HP
I was under the impression it was a relatively low phase noise design...
In any case, my 10MHz crystals are parallel-resonant. Are there any
alternative oscillator designs you'd suggest I look into?
Thanks,
Phil.
On 24/04/14 02:38, Bob Camp wrote:
HI
The circuit they show is not very low
Hello everyone,
let me address the below claims and commentary which was posted without
first consulting with us.
Microsemi has recently seen a slightly higher failure rate of the CSAC
oscillators than expected. A small percentage of our customers have been
adversely affected by this
Back from travel. I hijacked another thread and that is bad behavior. Sorry.
So here is the thread all by itself.
Background
To remove the new wwvb bpsk so that old phase tracking receivers can work.
As a by-product of that effort you do obtain the new format data from wwvb.
Already released are
Hi
There is no difference at all between a 32 pf series crystal and a 32 pf
parallel crystal. They both resonate with a 32 pf load and operate at exactly
the same frequency into that load. Your crystals will work fine with that
circuit.
The big claim to fame of the circuit shown is that you
John,
I have a similar unit (probably from the same seller), advertised as
an Z3805A upgraded to the features of 58503A, whatever that is
supposed to mean.
Mine also does not get warm on top, though it appears to be providing
a decent 10 MHz output and indicates GPS lock. This is the best
On 04/24/2014 10:41 AM, sg sg wrote:
Hi,
I'm about to implement a PLL for a 24.576 MHz VCXO using the phase-frequency
detector (PC2) of the NXP 74HCT9046A. From the datasheet
(www.nxp.com/documents/data_sheet/74HCT9046A.pdf) it is not clear to me what
the maximum operating frequency for
Said,
I recognize this situation so well. Feel with you on the issue and hope
you find that it resolve itself nicely.
Cheers,
Magnus
On 04/24/2014 10:50 PM, saidj...@aol.com wrote:
Hello everyone,
let me address the below claims and commentary which was posted without
first consulting with
Hi
I seem to have been in exactly the same position many times before and also
wish you well in resolving this (as I’m *certain* will be the case).
Bob
On Apr 24, 2014, at 7:48 PM, Magnus Danielson mag...@rubidium.dyndns.org
wrote:
Said,
I recognize this situation so well. Feel with you
Hi Magnus, Bob,
Thanks much for your kind words.
The failure rate is thankfully so low that we are not greatly alarmed, and
Microsemi has been a champ in resolving any failures with/for us when they did
show up. We are awaiting the results of the full re-qualify that Microsemi is
doing on the
Out of curiosity, what's the current price for one of these for a time-nut
to play with?
Regards,
Jim Palfreyman
On 25 April 2014 11:26, Said Jackson saidj...@aol.com wrote:
Hi Magnus, Bob,
Thanks much for your kind words.
The failure rate is thankfully so low that we are not greatly
I believe Microsemi still charges around $1500 for a CSAC. Some were offered on
Ebay for around $500 I think some time ago..
Sent From iPhone
On Apr 24, 2014, at 18:33, Jim Palfreyman jim77...@gmail.com wrote:
Out of curiosity, what's the current price for one of these for a time-nut
to play
On 4/24/14, 6:26 PM, Said Jackson wrote:
Hi Magnus, Bob,
Thanks much for your kind words.
The failure rate is thankfully so low that we are not greatly alarmed, and
Microsemi has been a champ in resolving any failures with/for us when they did
show up. We are awaiting the results of the full
19 matches
Mail list logo
