Re: [time-nuts] Qualcomm 1152 Synthesizer Boards

[Mike Seguin]

Not really "Time Nuts" related, but feed these 10 MHz and they make an 
excellent marker system for 2304, 3456, 5760, 10,368 and 24,192.


(yes they have harmonics up to 24 GHz)
---
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"A closed mouth gathers no feet"

On 2018-03-20 12:26, Richard Solomon wrote:
In rooting through my stash, I found a couple of these boards that I 
picked up


some years ago.


Are they of any use these days or has technology made them obsolete ?


Thanks, Dick, W1KSZ


Sent from Outlook
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[time-nuts] GenRad 1115B

[Mike Seguin]

I've been given a General Radio 1115B. I have not looked around much yet 
for a manual, but does anyone have info on the unit?


Tnx!
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Re: [time-nuts] Anderson PowerPole (was Charles Wenzel GPSDO)

[Mike Seguin]

NL2 etc 40A

They typically run about $3 per connector. I use them on high power 
Solid State amps. (VHF and up)


Mike

On 6/22/2017 10:10 AM, Clay Autery wrote:

OK I was wrong...  Attila was right.  IF we are going to talk
alternatives and not simply bash PP cons, then I'm in.  Always up for a
bit of over-engineering.  

The speakon connectors are interesting...

Do you have a favorite series/model, Mike?

__
Clay Autery, KY5G

On 6/22/2017 7:40 AM, Mike Seguin wrote:

For anything critical, I use these connector from the professional
sound industry.

http://www.neutrik.com/en/speakon/

Mike



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Re: [time-nuts] Anderson PowerPole (was Charles Wenzel GPSDO)

[Mike Seguin]

For anything critical, I use these connector from the professional sound 
industry.


http://www.neutrik.com/en/speakon/

Mike

On 6/22/2017 8:29 AM, Clint Jay wrote:

It is possible to get hold of locking barrel connectors, they insert as
normal and a quarter twist fastens them in place. The plugs and sockets are
compatible with non locking equivalents too.

Of course they're not great for applications that need a decent amount of
current and other disadvantages as noted elsewhere.

On 22 Jun 2017 1:11 pm, "Attila Kinali"  wrote:


Moin,

On Thu, 22 Jun 2017 06:20:27 -0500
Clay Autery  wrote:


TVB for the win!  

Can we please let it go here?
Do we REALLY need to have the same PPcon discussion yet again?


Actually, I read it with interest. I am designing quite a bit of
electronics. A lot of it is single use, then "throw-away" these
days so long running times are not that much of an issue.
But selecting the right power connector is always a problem
I face. I often choose the 5.5x2.5mm barrel plugs, as they are
quite common on power supplies, but they are kind of suboptimal
when it comes to retentiony The Kycon 4-pole plug is slightly
better, but every and each power supply has a different pinout,
which means that I either need to design it for a specific power
supply or add 8 diodes to get the polarity right.

I pondered a couple of times to use Molex Micro-fit connectors,
as they are cheap, locking and available in almost any number of
poles. The current and voltage rating hare high enough for almost
all needs (but not enough for 240V mains, even if it's rated 300V!).
And incidentally the crimping tool doesn't cost an arm and a leg.
But it's not really a connector one wants to use to power a device
in a proper housing.

Reading on what other people are using and what advantages/disadvantages
the different power plugs have is quite interesting for me.

So, please keep it comming!

 Attila Kinali
--
It is upon moral qualities that a society is ultimately founded. All
the prosperity and technological sophistication in the world is of no
use without that foundation.
  -- Miss Matheson, The Diamond Age, Neil Stephenson
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Re: [time-nuts] The ultraAtomic clock for home

[Mike Seguin]

Does anyone know of a clock with digital readout that uses the CME-8000?

Tnx,
Mike

On 2017-04-07 13:03, Tom Van Baak wrote:
Very good catch it is *not* the cme8000 chip. Thats a classic am 
receiver.

It is the everset chip. Sorry for mis-leading.


Hi Paul,

I can confirm (from talking with the guys backing it) that, yes, it's
the EverSet ES100, in die form (CoB). I believe you and I have both
used the early Xtendwave dev kits with the ES100 as SMT part. It's
nice to see the chip still lives and finally made it to a product!


I uploaded more ultrAtomic info and tear-down photos:

http://leapsecond.com/pages/ultratomic/

I encourage those of you who just bought these clocks to do some
experiments. The obvious ones are:

1) See how long it takes to acquire the correct time, at all sorts of
different and difficult environments, compared to the traditional WWVB
clocks. Check for off-by-one second, or minute, or hour errors.

2) See how accurate they really are. For clocks like this I use a
variety of piezo sensors (feel the tick), acoustic sensors (hear the
tick), optical sensors (see the tick), and mostly electrical sensors.
Some of these are passive (non-destructive) timings and good enough.
Others require some level of disassembly but are more precise. For a
stepper motor clock it's easy to tap onto the coil connections and get
a sharp pulse every second or two. Then use a time interval counter,
or picPET, or TICC, or PC-based PPS-capture to collect readings. Note
the signal level is usually low power and below typical TTL levels,
and they do NOT drive 50R!


If all goes well, we can soon talk about a time-nuts special where we
get someone to make a timing board or disciplined timing board based
on the ES100 chip. The bad news is that at the same price it would be
like a million times worse than GPS. The good news is that lots of
applications need only ms level timing; there are places where WWVB is
receivable and GNSS is not; and then there's the redundancy and
low-power factor.

/tvb

- Original Message -
From: "paul swed" 
To: "Discussion of precise time and frequency measurement" 


Sent: Friday, April 07, 2017 5:08 AM
Subject: Re: [time-nuts] The ultraAtomic clock for home


Tom
Very good catch it is *not* the cme8000 chip. Thats a classic am 
receiver.

It is the everset chip. Sorry for mis-leading.
Regards
Paul
WB8TSL


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Re: [time-nuts] Antique precision timing device without electronics

[Mike Seguin]

Very interesting use of a tuning fork.

I have only seen this once before. I have the tuning fork used with an 
Ampex Model 300 reel to reel tape machine. The tuning fork was used as a 
reference in the power supply that drove the capstan motor for accurate 
speed.


It's 60 Hz not 25 Hz. It's marked B E Eisenhour. Patent is here:

https://www.google.com/patents/US1880923

Pic is here:

https://www.dropbox.com/s/opmxr521qqkx76r/60%20Hz%20Fork.jpg?dl=0

Mike

On 3/16/2017 2:04 PM, Bill Hawkins wrote:

Hi Morris,

If there's no active devices (and you'd be sure to see them, not solid
state) where does the power to operate the motor come from? Is it the
same contacts that drive the fork?

It's amazing that there is high Q when contacts must be operated by the
fork.

Did it come with instructions for setting the weights at the end of the
fork tines?

Best regards,
Bill Hawkins

-Original Message-
From: time-nuts [mailto:time-nuts-boun...@febo.com] On Behalf Of Morris
Odell
Sent: Thursday, March 16, 2017 4:23 AM
To: time-nuts@febo.com
Subject: [time-nuts] Antique precision timing device without electronics

Hi all,

I was recently asked to resurrect this interesting device by a colleague
who collects antique scientific instruments. It's a "Chronoscope" made
by the H. Tinsley company in London in the early 20th century and used
to measure time intervals with the precision of those days. It's large
and heavy in a polished wooden case with a top deck that hinges up to
reveal the innards.

The timing reference is a large tuning fork about 30 cm (1 foot) long
and running at 25 cps. It's normally in a glass fronted housing (removed
for the video) that includes a pair of hinged mechanical arms for
starting it. It's maintained in oscillation by an electromagnet and
contact arrangement powered from a 12V DC supply. The fork amplitude is
controlled by a rheostat - too much and the tines impact on the magnet.
The video frame rate makes the fork look slower than it actually is. I
was able to extract a signal and measure the frequency with a modern GPS
disciplined counter - it's 0.007% off its specified 25 Hz! The frequency
is too low for my HP 5372A so I was not able to easily get an idea of
stability or do an ADEV measurement. The fork has quite a high Q and
takes over a minute to stop oscillating after the power is turned off.
There's a built in higher voltage AC power supply, probably a mains
transformer, potted in beeswax in a polished wooden box inside that is
intended to
  energise a large neon strobe lamp used to adjust the fork.
Unfortunately the lamp was not with the unit and is no doubt
irreplaceable.

The 25 Hz signal is filtered by an LC network  and used to run a
synchronous motor in the Chronoscope unit. Synchronous motors not being
self-starting, you need to tweak a knob to get it going - there's a joke
in there but I can't for the life of me think what it could be ?? The
"Contact" switch and associated socket on the back controls an
electromagnetic clutch that connects the clockwork counter mechanism to
the motor and the contact "on" time is indicated on the dials with 10 mS
resolution.

There's not a single active device in there and after a clean and lube
it runs very nicely from a modern 12V DC plugpack. My friend is very
pleased with it and it will take pride of place in his collection.

I'd be interested to know if any time nuts have knowledge or experience
of this lovely instrument.

A video of it is at  https://youtu.be/i5S8WS9iN_E

Enjoy!

Morris

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Re: [time-nuts] Using GPSDO as a Refrence for Protable Amateur Radio Microwave Operations

[Mike Seguin]

On 12/21/2016 2:06 PM, Eric Haskell wrote:

I am microwave amateur radio operator. A friend was discussing using an

eBay purchased Trimble 57963-D for providing a 10 MHz reference.

As you stated, the time needed for position hold is significant. For my 
microwave gear that needs 10 MHz in the field, I use a Jackson Labs 
LTE-Lite.


http://www.jackson-labs.com/index.php/products/lte_lite

It can be run in "mobile" mode. I have used it to discipline gear I run 
up to 241 GHz. Most of the disciplined LO's are Axtal in the 100 MHz 
range. It also supports 'position/hold' mode for use in a fixed position 
such as at home in my shop.


There was a group buy a while back.

Frankly, absolute frequency accuracy is a bit less of an issue than it 
used to be because so many of us now use SDR's for panadapters on 
receive. We can "see" 48/96/192 kHz of bandwidth at once so if a signal 
is off a few kHz and moves a bit, no big deal.


If you are trying to do weak signal digital modes, that's another story.

Mike

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Re: [time-nuts] Newbie With a Z3801 Problem

[Mike Seguin]

Hi Dave,

For power supply voltages, did you check here:

http://www.realhamradio.com/GPS_Frequency_Standard.htm

Scroll down the page a bit to get to the power supply info.

Your problem is very odd. I retired my Z3801A a while back as it was 
seeing an occasional error. I should drag it back out and see what it does.


Mike

On 11/4/2016 8:23 PM, Dave Hallidy wrote:

Hal-
I took your suggestion and sure enough, I can see on the scope that it puts
out a string on power up.  I'm sure that's why SatStat gives me a
"Communications established- please wait" then "Checking echo".  But then it
all seems to fall apart, because after that, it drops back to "Trying to
establish communications" and "No response..." until I power down then back
up, and it repeats the cycle.

I don't have any real info on power supply voltages, so I don't know what
they should be.  On power up, it goes through the cycle of briefly lighting
the LEDs on the main board red, ending with the green blinking one on the
main board at the same time cycling through the front panel LEDs and ending
with just the power LED lit.  I can pull it apart and check for caps needing
replacement if you think that might be a cause of this.

Dave

-Original Message-
From: time-nuts [mailto:time-nuts-boun...@febo.com] On Behalf Of Hal Murray
Sent: Friday, November 04, 2016 6:56 PM
To: Discussion of precise time and frequency measurement
Cc: hmur...@megapathdsl.net
Subject: Re: [time-nuts] Newbie With a Z3801 Problem

I would put a scope on the TX line from the Z3801A and power cycle it.  I'm
pretty sure it prints out the version string on power up.

Have you checked the power supplies?  Or looked for old electrolytics?




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[time-nuts] Lucent KS-24361 Simple Doubler

[Mike Seguin]

Paul, W1GHZ has put together a simple doubler for the 5 MHz OCXO in the 
Lucent boxes. It's based on a Minicircuits part with MIMIC amp.


Details here:

http://users.burlingtontelecom.net/~n1...@burlingtontelecom.net/images/Simple_Frequency_Doubler.pdf

Mike

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Re: [time-nuts] Lucent KS-24361 Simple Doubler

[Mike Seguin]

Hi Rob,

It works fine at 5 MHz to double to 10 MHz. The numbers Paul listed are 
for 5 to 10 MHz.


Mike

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On 2014-11-25 12:24, Rob040 . wrote:

Hi Mike,

It's indeed a very simple circuit, but... not if you want to double
5MHz. It's working from 10MHz onwards and it seems there is no other
version available that goes lower. Or is it good enough to use it also
for 5Mc?

Regards,
Rob.



Date: Tue, 25 Nov 2014 06:08:10 -0500
From: n1...@burlingtontelecom.net
To: time-nuts@febo.com
Subject: [time-nuts] Lucent KS-24361 Simple Doubler

Paul, W1GHZ has put together a simple doubler for the 5 MHz OCXO in 
the

Lucent boxes. It's based on a Minicircuits part with MIMIC amp.

Details here:

http://users.burlingtontelecom.net/~n1...@burlingtontelecom.net/images/Simple_Frequency_Doubler.pdf

Mike

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Re: [time-nuts] 10MHz LTE-Lite

[Mike Seguin]

U-Center vers 8.12

http://www.u-blox.com/en/evaluation-tools-a-software/u-center/u-center.html

Mike

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On 2014-11-21 18:54, Jim Sanford wrote:

what is the ublox application

Thanks,
Jim
wb4...@amsat.org

On 11/20/2014 6:17 PM, S. Jackson via time-nuts wrote:

Paul,
  if you set the serial switch on the LTE-Lite over to the NMEA side 
then the

  uBlox application will give you all sorts of bar graphs for signal
strengths,  position, time, etc as it decodes all the NMEA messages.
  Alex,
  the TSC5125A user manual contains a description of the theory in its
Appendix B. Its probably available on the Microsemi website as I don't 
think its

confidential.
  Also, I think John's TimePod user manual probably has a description 
of it.
Otherwise I remember Sam Stein (who is behind the TSC units) had some 
PTTI
or  similar presentations discussing the technology, but I don't know 
where

those  could be downloaded.
  Bye,
Said
In a message dated 11/20/2014 14:34:32 Pacific Standard Time,
a...@pcscons.com writes:



Hi Said,
do you have any information about how that  TimePod 5330A works any
principal  description?
73
KJ6UHN
Alex

On 11/20/2014 2:08 PM, S. Jackson  via time-nuts wrote:

Hello Mike,
   attached  is a 10MHz DIP-14 TCXO Phase Noise plot from a random  
LTE-Lite

  unit.
   I had sent out a 20MHz typical phase noise  plot some weeks ago, 
and

comparing the two they are almost perfectly  6dB apart as would be

expected from
the 20log(n/m) relationship. There  are variations from unit to unit 
of
course,  but it does not seem  like one version of the board or the 
other

has

advantages  in  terms of phase noise.
   I had also sent out a  superimposed plot of the 20MHz and the 
divide-by-2
10MHz output of the  same board at that time, and again the 
relationship

was

almost  perfectly 6dB lower at 10MHz versus 20MHz.
   While  phase noise follows theory, it does seem that the DIP14 
metal

shield
  has a beneficial effect on the ADEV stability though. The plots we 
are
  getting  are pretty darn good, and I want to test more boards 
before I

post any
ADEV,  because its quite a bit better than our  specification and I 
want

to

make sure  its  real.
   The 10MHz DIP-14 boards do not have an  isolating buffer like the 
20MHz
boards do, on these the TCXO drives  the output directly, so one must 
be

careful

   to set the  equipment to 1M Ohms input impedance or use a buffer
externally,   which is what we did to measure the attached PN plot.
Bye,
Said



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[time-nuts] Lucent KS-24361

[Mike Seguin]

I was having some problems with a couple of my laptops running WinXP and 
Win7 64 bit getting them to use Z38xx or SatStat50 to talk to the boxes. 
I was using the 'RS-232 hack'. I suspected the levels weren't up to the 
standard my laptop ports wanted to see.


I pulled out an old short haul modem I had which is an RS-232 to 
RS-422 converter. Wired it this way:


Lucent to Modem
TX+ to RX-
TX- to RX+
RX+ to TX-
RX- to TX+

Works great! No issues with the laptops/software now through Win7 64 bit.

Mike

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Re: [time-nuts] Lucent KS-24361, HP/Symmetricom Z3809A, Z3810A, Z3811A, Z3812A GPSDO system

[Mike Seguin]

Hi Arthur,

Found your original picture/post. TNX!

http://s906.photobucket.com/user/rjb1998/media/RFTG-uREF1photo1_zps87c505ca.jpg.html

Would you share what you did for a 5 MHz buffer?

Mike

On 10/31/2014 10:20 PM, Arthur Dent wrote:

Bob Stewart bob at evoria.net
“…I have both of my units sitting on the bench. I found that I needed to
connect them together to get the REF1 unit to come out of standby….”

Bob Camp kb8tq at n1k.org
“I suspect that somebody will have to figure out what the 15 pin
connector / jumper is doing. On previous RFTG units there was a
way to re-wire the crossover interface to fake out the slave detect
process. That would let you run a single GPS equipped box and have
it behave correctly. Without the fake wires trick none of them
played nice without the slave being present….”
++
Reposting what I had posted over a week ago, in case you missed it….

Arthur Dent golgarfrincham at gmail.com Wed Oct 22 13:59:48 EDT 2014
“…Way back on Fri Jun 11 16:48:43 UTC 2010 I posted about using one of
these units I had modified but at the time there wasn't a single person
who was interested. I have been using the RFTG-u REF1 since then and
it is a nice unit. The modifications I added (including a power supply
-see photo) allows the lights to cycle through their normal sequence
on warm-up and the second unit isn't needed at all….”

-Arthur
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Re: [time-nuts] Lucent KS-24361, HP/Symmetricom Z3809A, Z3810A, Z3811A, Z3812A GPSDO system

[Mike Seguin]

I have both of my units sitting on the bench. I found that I needed to 
connect them together to get the REF1 unit to come out of standby.


I am using GPSCon to monitor and it appears to work fine.

One thing on my units, when I power cycled them, it started a 'survey' 
over! I didn't expect that. Are others seeing this. There must be a way 
to store the surveyed position


Tnx,
Mike

On 10/30/2014 3:59 PM, Bob Stewart wrote:

Hi Anthony,
Did you power cycle both units as part of connecting them together at J5 to J5? 
 And can you remind me whether you are using the supplied interface cable, or 
are you using something else?  After warmup, the ON light is on for the REF-0 
unit and the STBY light is on for the REF-1 unit.  While running, there is no 
output from J8 on the unit marked STBY.  J8 works on the unit marked ON.  There 
is a timestamp coming from J6, and I think a 1PPS signal on some pin or other.

Bob From: Anthony Roby ar...@antamy.com
  To: Discussion of precise time and frequency measurement time-nuts@febo.com
  Sent: Thursday, October 30, 2014 2:24 PM
  Subject: Re: [time-nuts] Lucent KS-24361, HP/Symmetricom Z3809A, Z3810A, 
Z3811A, Z3812A GPSDO system

I'm still having no luck with mine.  When I power on, the LEDs cycle, the Fault 
light is on and the No GPS and Standby lights flash.  When I connect my GPS 
antenna, the No GPS light stops flashing and stays on.  After several minutes 
only the Standby light is on.

When I connect both the Ref1 and Ref0 together with the interface cable, the 
Fault lights on both units are illuminated.

Do you see the same?  I don't know what to infer from the Fault light since 
there is no supplemental data to work from.

Anthony


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Re: [time-nuts] TU60-D120-041 power up

[Mike Seguin]

I wonder if these are similar to the TU30 series. On those, grounding 
Pin 7 on J1 would bring the unit up @ 4800 baud NMEA...


Mike

On 10/22/2014 4:20 PM, Hal Murray wrote:


sjdeha...@gmail.com said:

I think you pointed out that this GPS unit defaults to the Navman Binary
mode.  I have tried to use HyperTerminal via a serial port and about all  I
see is @@EA followed by a burst of random characters every second.  I  tried
4800 and 9600 baud.  I would like to be able to read the NMEA  sentences
(GPGSA, etc) so I can use Day, Date, Time and 3D Fix for other  purposes.
To do that I think I need to change the format of the GPS  output data.
(From Navman Binary to )


Things like @@Ea are probably Motorola/Oncore rather than Navman.  I'm not
familiar with Navman, but I found one web page on their site about the SiRF
binary protocol.

For things like this, my first try is usually gpsmon from the gpsd package.
It's very good at figuring out what type of device you have.

By default, gpsmon /dev/ttyXXX (for whatever the filename is on your setup)
will try various baud rates and such until it recognizes something.  Then it
decodes and displays the data.  By default it doesn't change the speed or
mode.

There is a command to switch to/from NMEA and binary modes, and a command to
change the baud rate.

There is another command to try harder to discover the device type.  That
sends commands that might confuse/break some devices.

Switching to NMEA mode may get lost when you reset or power cycle the device.
  It will probably stick around long enough for you to debug the next layer of
software.  You can probably find the command to switch-to-NMEA in the gpsd
sources.



--

73,
Mike, N1JEZ
A closed mouth gathers no feet
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[time-nuts] CW12-TIM

[Mike Seguin]

I just started working with a Navsync CW12-TIM. I'm interested in 
programming the freq output.


What's the best software to use?

TIA
Mike
--

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Mike, N1JEZ
A closed mouth gathers no feet
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Re: [time-nuts] CW12-TIM

[Mike Seguin]

I got it. WinOncore. Frequency set.

Mike

On 8/31/2014 10:22 AM, Mike Seguin wrote:

I just started working with a Navsync CW12-TIM. I'm interested in
programming the freq output.

What's the best software to use?

TIA
Mike


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Mike, N1JEZ
A closed mouth gathers no feet
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Re: [time-nuts] CW12-TIM

[Mike Seguin]

You are right. There is no frequency set command in WinOnCore, but you 
can simply type in $PRTHS,FRQD,0.01 and press return to send the command 
from the command window. That's what did.


WinOncore let me see the unit status - satellite tracking etc as did 
VisualGPS and Tac32.


In the CW12 User manual, there are references to WinOnCore all through it.

Mike

On 8/31/2014 1:12 PM, Azelio Boriani wrote:

A frequency set command in WinOncore? The WinOncore was designed by
Motorola for their receivers using their binary command set, it is
very strange that this software can have a ConnorWinfield/Navsync
proprietary command
($PRTHS,FRQD,frequency_in_MHz[*optional_checksum]crlf) to set
the CW12 output frequency. A dedicated software is not needed: using
whatever serial terminal program, you just send the above command
using the keyboard and you can set any frequency upto 30MHz. For 10KHz
just type $PRTHS,FRQD,0.01crlf (the serial port is 38400,N,8,1).
The CW12-TIM must be the NMEA version.

On Sun, Aug 31, 2014 at 4:57 PM, Mike Seguin
n1...@burlingtontelecom.net wrote:

I got it. WinOncore. Frequency set.

Mike


On 8/31/2014 10:22 AM, Mike Seguin wrote:


I just started working with a Navsync CW12-TIM. I'm interested in
programming the freq output.

What's the best software to use?

TIA
Mike



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Mike, N1JEZ
A closed mouth gathers no feet
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Mike, N1JEZ
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[time-nuts] NavSync CW12-TIM

[Mike Seguin]

Anyone know what the minimum step is on the programmable frequency 
output of this engine?


Tnx,
Mike
--

73,
Mike, N1JEZ
A closed mouth gathers no feet

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[time-nuts] Lady Heather

[Mike Seguin N1JEZ]

What's the command to set the map to show satellite signal level vs 
position?


73,
Mike, N1JEZ
A closed mouth gathers no feet 



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Re: [time-nuts] frequency reference for portable operation

[Mike Seguin N1JEZ]

Hi Jim,

There are a few different schools of thought. Here in New England, I use a 
very simple GPS locked 10 MHz oscillator. It's based on the Jupiter GPS 
series with 10 kHz out. It drives a Qualcomm 1152 MHz board. This board 
generates harmonics through 24 GHz.


I don't lock any of my rigs up to 24 GHz. From 47 GHz and up (78, 122, 241 
GHz) the rigs are locked mostly using Axtal Axiom 75 series OCXO's and GPS 
via VE1ALQ reflock boards.


For my rigs up to 24 GHz, I use the Qualcomm board to generate accurate 
markers. From there, I can adjust my IF to compensate. The simple GPSDO 
driving the Qualcomm is accurate to about 2 Hz/GHz, so even at 24 GHz, I'm 
typically within about 50 Hz - well within my narrow CW filter on the IF.


The added benefit of using the GPS is I have it hooked to an ON4IY RoverBox. 
This gives me grid square, and Sun position based on location/time for 
aligning my dish (if the sun is out...)  Plus the simple GPSDO is locked and 
running in about 3 minutes or so from a cold start.


I find I don't need ultimate accuracy from 24 GHz down. And not messing 
with the crystals in LO's keeps phase noise down etc...


We've started to add Panadpaters to our IF rigs lately using the FUNCube SDR 
initially and now the cheaper sticks. These let us see 96 kHz or better at 
once, so finding the signal can be pretty easy.


Remember, locking is great if both ends are locked. If not, you're back to 
tuning around to find the signal (that's where the panadapter is great!)


KT1J and I did our first 2 km 122 GHz contact a while back. We were both 
locked and had rifle scopes calibrated for aiming. It was amazing to point 
our dishes and start sending and instantly hear the other station with no 
tuning!


73,
Mike, N1JEZ
A closed mouth gathers no feet


- Original Message - 
From: Jim Lux jim...@earthlink.net
To: Discussion of precise time and frequency measurement 
time-nuts@febo.com

Sent: Sunday, March 10, 2013 10:23 AM
Subject: [time-nuts] frequency reference for portable operation



Asking here on behalf of a friend..

With respect to portable amateur microwave operation.. you want good close 
in phase noise (so you can use narrow band filters) AND good frequency 
accuracy (so you can find the signal) 



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[time-nuts] Shera Board

[Mike Seguin N1JEZ]

I have a Shera control board that I haven't used in quite some time. I rely 
on my Z-3801A, Thunderbolts etc


Time to sell it if there's any interest. I do not want to ship outside the 
US. It's currently still in the box where it was disciplining a 10544A. The 
board only is for sale. Not the GPS engine or 10544A etc. Pic here:


http://users.burlingtontelecom.net/~n1...@burlingtontelecom.net/images/Sheraboard.jpg

Make me an offer!

73,
Mike, N1JEZ
A closed mouth gathers no feet 



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Re: [time-nuts] Jupiter GPS questions

[Mike Seguin N1JEZ]

Hi TJ,

I recently ran into a similar issue with a Jupiter T. No NMEA output. What I 
found was the unit came up in Motorola Binary @ 9600 and sent only an 
initial string out.


The solution here was to use a PIC. (I was actually working with a PIC done 
by Tommy Sullivan called 3DFIXLED)


Here are the HEX commands to send to the unit to make it do 9600 baud NMEA.

1.) 0x40 0x40 0x57 0x62 0x01 0x34 0x0D 0x0A

This is the @@Wb1 command - switch from Motorola Binary to Zodiac Binary

2.) 0xFF 0x81 0x33 0x05 0x03 0x00 0x00 0x07 0xCB 0x71 0x00 0x00 0x00 0x00
0x01 0x00 0xFF 0xFF

This switches to NMEA. There are three additional strings that can be sent 
to

assure sentence output. I'm not sure they are needed, but here they are:

1.) 0xFF 0x81 0x4E 0x04 0x03 0x00 0x00 0x67 0xB0 0x12 0x00 0x00 0x01 0x00
0x00 0x00 0xFF 0xFF
2.) 0xFF 0x81 0xEB 0x03 0x03 0x00 0x00 0x67 0x13 0x13 0x00 0x00 0x01 0x00
0x00 0x00 0xFF 0xFF
3.) 0xFF 0x81 0xF4 0x03 0x03 0x00 0x00 0x67 0x0A 0x13 0x00 0x00 0x01 0x00
0x00 0x00 0xFF 0xFF

There is no ACK that I see. I'd power up and wait a few seconds, then send
the first string, then wait a couple more secs and send at least the second
string.

After doing this, my unit now sends out GPGGA, GPRMC and GPGSA sentences @ 
9600 baud.


73,
Mike, N1JEZ
A closed mouth gathers no feet


-Original Message-
From: TJ Fiel zulut...@yahoo.com
Subject: Contact: Jupiter GPS questions



Message: Hello KO4BB,

Many thanks for making so many resources available through your
website.  I'd never seen Labmon 7 before and it cured several
problems with previous versions.

I'm attempting to use a Jupiter serial GPS receiver with APRS.  This
is an OEM version made for Etak/Sony about 1999, p.n. TU40-D310-011.
It uses the Rockwell Scorpio DSP (11577-11) but implements few
features.  I've never found a datasheet or even a pinout for this
chip.  Conexant stopped producing this chip about ten years ago and
now they don't appear to answer their phones.  Apparently they never
released chip level data to the public for this DSP, only for
built-up GPS modules.

My biggest issues are automatically forcing NMEA out at startup and
possibly adding an RTC.  Any insights you can give will be greatly
appreciated.

Best wishes and thanks,
TJ Fiel 




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[time-nuts] FEI-Zyfer

[Mike Seguin N1JEZ]

Anyone have a manual for an FEI-Zyfer Nanosync II? It's listed on their 
website, but clicking on the link throws up a 404 error


Tnx,
Mike
A closed mouth gathers no feet 




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Re: [time-nuts] FEI-Zyfer

[Mike Seguin N1JEZ]

Hi guys,

I was able to simply register at the site then had access to another file 
are that had info on the Nanosync II and their monitor software.


Mike

- Original Message - 
From: Mike Seguin N1JEZ n1...@burlingtontelecom.net

Subject: [time-nuts] FEI-Zyfer


Anyone have a manual for an FEI-Zyfer Nanosync II? It's listed on their 
website, but clicking on the link throws up a 404 error


Tnx,
Mike
A closed mouth gathers no feet




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Re: [time-nuts] Unplug T-bolt before booting up...??

[Mike Seguin]

Usually you'll see the mouse cursor jumping all over.

When that happens, unplug the Thunderbolt serial cable. Mouse cursor 
should stabilize. Then go in under Device Manager and look for a 
Microsoft serial mouse. You want to disable it, not uninstall.


That should fix it.

There is a Windows command line switch that's supposed to solve the 
issue, but I've never been able to get it work.


Mike

---
73,
Mike, N1JEZ
A closed mouth gathers no feet

On Tue, 29 Nov 2011 11:15:01 -0500, Michael Baker wrote:

Hello, TimeNutters--

I have heard of the problem of needing to unplug
a T-bolt before booting up the (Windows) computer
but I have never seen that problem myself.  I have
had a T-bolt running on several different desktops
and laptops and never experienced it.  I do recall
that there was a fix for this problem but have no
idea what it is.

Mike Baker


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[time-nuts] NTP offset

[Mike Seguin]

Howdy,

Does anyone know of software that could be used to delay NTP by a preset 
amount?

Here's the scenario: I work for Public Radio. They have a new satellite 
audio delivery system called Content Depot. It has the ability to output 
NTP. All fine and well. The problem is that the audio delivered is delayed 
due to processing by ~ 700ms so the time syncing doesn't match the audio 
delivery. What I was hoping to do was pull off the NTP for a Content Depot 
receiver, delay by 700 ms and send it around to the rest of my computers 
that rely heavily on time sync (like automation).

Mike 


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[time-nuts] For Sale

[Mike Seguin]

Shera Board. This is a complete board already populated.
Also an Oncore UT+ and EGG H176B 10 MHz osc (drop in replacement for HP 
10811 or 10544 series)

Please contact Henry, KT1J if interested at:

[EMAIL PROTECTED]

73,
Mike, N1JEZ
A closed mouth gathers no feet 


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Re: [time-nuts] Jupiter GPS receiver

[Mike Seguin]

Can someone point me to the source where theknown fault of the Jupiter
listed below is documented??

I have a bunch of these engines and would like to see this documentation.

Tnx!

73,
Mike, N1JEZ
A closed mouth gathers no feet

- Original Message - 
From: Bjorn Gabrielsson [EMAIL PROTECTED]
To: Discussion of precise time and frequency measurement
time-nuts@febo.com
Sent: Sunday, January 01, 2006 4:57 PM
Subject: Re: [time-nuts] Jupiter GPS receiver


Geoff [EMAIL PROTECTED] writes:

 Didier Juges wrote:
  I am planning to let the GPS receiver run a while longer to see if it
  corrects itself at some point, and if it does not, I'll reboot it.

 Hello Didier,

 The Jupiter GPS receiver (if used in NMEA and not binary mode) has a known
 fault, that it can be 1 or 2 seconds delta to UTC, this is independent of
 the leap-second situation.

Hi Geoff!

This afternoon, :-( ,I got an opportunity to run my jupiter in binary
mode again. It had been running in NMEA mode, when switched to binary
it was 2 seconds late in binary mode. But had bit set saying that
'time mark not valid' After some 15 minutes it ran ok again, still
do.  First strange behaviour I have seen in binary mode. Regret
missing the leap second, but I would not be surprised if my jupiter
would have shown problems.

Anybody running a jupiter in binary mode over the event?

--
Björn.


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Re: [time-nuts] Brooks Shera's GPS standard or HP Z3801A??

[Mike Seguin]

- Original Message - 
From: Dr. David Kirkby [EMAIL PROTECTED]
Subject: [time-nuts] Brooks Shera's GPS standard or HP Z3801A??


 6) If one needs to buy a manual on the Z3801A, that will add to its cost.

When I bought mine from BuyLegacy 3 years ago it came with a printed
manual... I have since found it as a pdf. I can send the pdf if you like.
It's 1MB.

73,
Mike, N1JEZ
A closed mouth gathers no feet


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