Am 02.12.2014 04:29, :
Hal, (see below)
4 RX+
8 RX-
Looks good.
5 TX+
6 TX-
I think there is a typo in there. That should be pins 5 and 9.
I'm using pins 9, 8, and 7 as per Stewart's message that started this
discussion.
3 and 7 ground
Pins 1, 2, and
On 2 Dec 2014 03:10, wb6dgn_...@att.net[hp_agilent_equipment]
hp_agilent_equipm...@yahoogroups.com wrote:
Isn't the 10811 a double oven oscillator (an oven within an oven)? I
also believe it has anticipator circuitry to predict changes based on
environmental parameters. Or...am I confusing
Hendrik,
the 10 MHz may not be dirty. The spectrum you show is that of a 10 MHz
rectangular wave and that's what on the output from the 10 MHz
connector, just a (may be clean) TTL-level signal, nothing fancy.
Götz
Am 02.12.2014 07:57, :
Hi List,
here is my example spectrum taken with a
Hi
On Dec 2, 2014, at 1:05 AM, LiAng lll...@gmail.com wrote:
Bob Camp kb8tq@... writes:
Hi
Looks like something came loose when you swapped around the parts. That
or the regulator is very noisy.
Bob
I know why the stop1-start is not stable. There is a noise generator
Hi
The interesting thing about the 10 MHz is that it is “clean enough”. The signal
was designed to feed the reference for things like counters and spectrum
analyzers. It’s plenty clean enough (spectrum, phase noise, and ADEV) for that
use. There are a *lot* of 10 MHz OCXO’s out there with a
Götz wrote:
the 10 MHz may not be dirty. The spectrum you
show is that of a 10 MHz rectangular wave and
that's what on the output from the 10 MHz
connector, just a (may be clean) TTL-level signal, nothing fancy.
The odd harmonics of 10MHz do indicate a
square-ish wave. But there is also
Hi
Yes that’s a typo
On Dec 1, 2014, at 9:10 PM, Bob Camp kb...@n1k.org wrote:
Hi
If you dig back a month or so, there is a post with all the pinouts on all
the connectors.
4 RX+
8 RX-
5 TX+
6 TX-
should be pin 9 for TX-
Sorry about that.
Bob
3 and 7
Hi
One clarification - there are multiple ways you can design an OCXO:
1) You can use an outer oven to improve the temperature stability under normal
conditions.
2) You can use a second oven to “help” at the cold end of the range (maybe
below -20C)
3) You can simply do a really good single
On Dec 1, 2014, at 9:49 PM, Mark Sims hol...@hotmail.com wrote:
I was scanning through the shared PCB projects on OSHPARK.COM
http://oshpark.com/ and came upon this little driver for stepper motor wall
clocks:
https://oshpark.com/shared_projects/gpkIWuAW
The 5342A counter and the 5345A counters both predate the 10811A and were
originally fitted with 10544A oscillators for the option 1 high stability
timebase
Once the 10811A was released the instruments were fitted with the 10811A as a
production change going forward and service replacements
Yes, and the even harmonics are due to the waveform not being symmetrical
(eg. 50%). The 5MHz subharmonic is probably due to a little jitter that
comes out of the synthesizer/divider at that rate.
-Chuck Harris
Götz Romahn wrote:
Hendrik,
the 10 MHz may not be dirty. The spectrum you show is
Just to give back to the group, here are the connectors I chose from
Digikey to make the GPS MMCX antenna included with the kit detachable for
an enclosure:
1x ACX1499-ND CONN ADAPT JACK-JACK MMCX 50 OHM
1x 744-1715-ND RF CABL MMCX ML STR / ML RA 6
Cheers,
Joel
W0KGW
On Tue, Nov
Hi from NJ,
I am more involved in 100 Mhz to 128 MHz crystal oscillators and their
measurements, 10 MHz design is new for me.
I have analyzed and measured the famous HP 10 MHz SC based oscillator,
disassembled it, admired and measured the crystal. Does anyone still makes such
a large
Hey Dan,
You Wrote:
I wrote a kernel driver for the BBB timer hardware. It produces pps events for
things like ntpd to consume. The source for it is at
https://github.com/ddrown/pps-gmtimer
A side effect of this driver is it measures the interrupt latency and jitter on
the BBB hardware.
Quoting Iain Young i...@g7iii.net:
:
Is your code able to support multiple inputs simultaneously ? FreeBSD's
doesn't due to some architecture issue with the timing subsystem as I
understand it.
Or is it like the FreeBSD code, and I have to select exactly one of
TIMER4-TIMER7 input pins to drive
Thanks for the kind words, Dick. :-)
However, a couple of notes on the TADD-1 bandpass filter:
1. I *don't* recommend installing it unless there is a good reason. As
others have noted, any tuned circuit is a thermometer and will degrade
ADEV performance. Other than the original test unit,
No problem, always glad to be of help to those in need.
73 es HH, Dick, W1KSZ
On 12/2/2014 2:27 PM, John Ackermann N8UR wrote:
Thanks for the kind words, Dick. :-)
However, a couple of notes on the TADD-1 bandpass filter:
1. I *don't* recommend installing it unless there is a good reason.
NEL has great OCXOs. Also worth checking out Wenzel (they own Croven Crystals
and will sell them separately), Rakon, and Vectron.
I haven't seen any 100 MHz OCXOs rated for -145 at 100 Hz, but -135 can be had.
-- john, KE5FX
Miles Design LLC
-Original Message-
From: time-nuts
Thanks all for answering my question. I looked through old posting but
obviously didn't stumble upon Anthony's posting otherwise I would have
had my answer.
I made up a short cable to connect the Startech ICUSB422 to the KS-24361
J8 Diagnostic port and I can now connect. This is the final
Good evening all,
After getting my RS-422 interface sorted and my remote serial to TCP
configured, I am now able to connect to my KS-24361 boxes from a Win7
machine using a number of different applications to my LINUX box to
which the 24361 is physically connected.
On the LINUX box I am
Brief update:
This receiver (whatever it is) refuses to forget 1995 despite un-powering,
etc. I will learn to live with it, I think.
It was sold to me as a Z3801A updated to 58503A.
However:
1. The main board is labeled Z3805A (Not Z3801A) as are some of the chips.
2. It has only one 10
Hi
There’s a lot of commonality between the HP Z38xx designs up through the 3812.
They are by no means identical, but as you have seen, they are not terribly
different either.
Welcome to the wonderful world of China Surplus Inc.
It would not really surprise me to find that somebody simply
On 3 Dec 2014 02:08, James Robbins jsrobb...@earthlink.net wrote:
Brief update:
This receiver (whatever it is) refuses to forget 1995 despite
un-powering, etc. I will learn to live with it, I think.
You could report it to the seller as a fault. He must have quite a bit of
experience on
On 2014-12-02 19:46, Dr. David Kirkby (Kirkby Microwave Ltd) wrote:
On 3 Dec 2014 02:08, James Robbins jsrobb...@earthlink.net wrote:
Another option would be to hack the ntp software so it gives out a correct
date, assuming that you can determine what the
It was sold to me as a Z3801A
I sent you my posting earlier today, so hopefully you saw it. The Lucent unit
seems liberal in its interpretation of the pinouts, but once you've deciphered
it and got the +ve and -ve pins connected, it works reliably.
Anthony
-Original Message-
From: time-nuts
Hi John,
thanks, I am more interested in the inner workings of the 10 MHz
oscillators, and why they are about 10 db shy in phase noise.
And yes I have build 100 MHz oscillators with -145 .
Thanks , Ulrich
In a message dated 12/2/2014 6:29:10 P.M. Eastern Standard Time,
Hi, I'm a new time nut -- first posting...
For us newbie time nuts, is there any explanation on all the detailed data
that's available in Lady Heather?
I'm connected to a Trimble Resolution T. I understand some basic things like
ADEV, but I can't find any explanations online for all the
I'm using a soekris net4501 that I hacked according to
http://www.febo.com/time-freq/ntp/soekris/
I have hacked a Motorola Oncore M12+T receiver inside the case on a piece
of veroboard. It's really ugly, using a bunch of discretes for RS232
translation and such.
A BNC on the front privides PPS for
Hi Tom,
I would certainly be interested. I have 4 receivers that I would like to add
that feature to. I was thinking of also trying the technique with other
receivers, such as Trimble Jupiter/SMT or newer Ublox which provide
quantization data so I was thinking of a more generic serial/PPS
mflaws...@cox.net said:
I want to learn more in general about timing, deviation, steering, GPSDO's,
etc.,
Many years ago, I learned a lot by reading the manual for the Z3801A. It's
an owners/operators manual rather than a tutorial, but you can learn a lot by
reading between the lines.
Am 03.12.2014 um 00:28 schrieb John Miles:
NEL has great OCXOs. Also worth checking out Wenzel (they own Croven Crystals
and will sell them separately), Rakon, and Vectron.
I haven't seen any 100 MHz OCXOs rated for -145 at 100 Hz, but -135 can be had.
We had a few from Pascall that where
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