Re: [time-nuts] Replacement A9 boards for the HP 5065A

On Sun, Mar 4, 2018 at 1:04 PM, Charles Steinmetz wrote: > So, no PTFE or PS for practical reasons. That leaves us with PP, PPS, and > perhaps PC. These all have reasonably similar DA, so as long as one checks > the particular capacitor's datasheet to verify, DA should

Re: [time-nuts] Input filter for data logger

Look at the falling edge of your square wave - I'd guess there is some undershoot and it's triggering the extra counts. With the back to back limiting diodes in that circuit, I don't think the ringing shown in your scope trace will matter, however, ringing around the 0V level will matter. I've

Re: [time-nuts] J06 HP-59992A time interval calibrator for HP-531xx counters

FWIW Re: the relays. I worked through the Omron discontinuation notices for the first relay (I figure the original was a G5Y series, not GSY as in the manual) and it looks like the G6K series, easily available at Mouser and about $4 each would work, though you'd have to use a DPDT. The other two

Re: [time-nuts] J06 HP-59992A time interval calibrator for HP-531xx counters

$38 is for the wideband 100 - 600MHz PSCJ-2-1W - you'd want the PSCJ-2-1+ which is a little less... $29.20 and no price break until you get 10 of them. Looking at the PSCJ-2-1+ datasheet, the "phase imbalance" at the output ports is about 180 degrees. How they achieve that, they don't say. On

Re: [time-nuts] J06 HP-59992A time interval calibrator for HP-531xx counters

On Sun, Jul 9, 2017 at 10:55 AM, jimlux wrote: > On 7/9/17 10:27 AM, Bob kb8tq wrote: > >> Hi >> >> People *have* been known to sort MiniCircuits parts and use the “extras” >> in >> something else. A certain major oscillator manufacturer once bought a >> bunch >> of RPD-1’s

Re: [time-nuts] J06 HP-59992A time interval calibrator for HP-531xx counters

On Sat, Jul 8, 2017 at 5:15 PM, Mark Sims wrote: > I think the way the fine cal works by checking the the intervals between > four different edges that a lot of asymmetries in the signals are nulled > out in the software. > > How good are 1:2 180 degree phase shifters at

Re: [time-nuts] J06 HP-59992A time interval calibrator for HP-531xx counters

FWIW, the "Theory" section here may help: http://www.g8wrb.org/data///HP/Better_than_100_ps_Accuracy_in_HP_5370B_Time_Interval_Measurements_Through_Bias_Error_Reduction.pdf Phase errors through the splitters seem to be taken into account. The J06-59992A manual merely claims 100ps absolute

Re: [time-nuts] Puget sound area - nice auction

On Thu, Jul 6, 2017 at 8:33 PM, DaveH wrote: > There is a nice online auction in the Seattle area: > > http://murphyauction.hibid.com/catalog/105843/stratos- > product-development--l > lc-online-only/?ipp=100 > > Murphy runs a very clean auction - no shilling.

Re: [time-nuts] GPScon running on Raspberry Pi 3b

On Thu, Jun 22, 2017 at 5:36 PM, Mark Sims wrote: > > The PI does have a couple of logic level serial ports on the expansion > connector you can connect a level shifter two. One port is normally the > Linux serial console which you can configure to be a general purpose

Re: [time-nuts] Power connectors continued

On Thu, Jun 22, 2017 at 1:06 PM, Chris Albertson wrote: > > A really dumb idea was this guy, I heard this story secondhand. He used > A/C extension cords for speaker cables because they work well for that > purpose, but then someone plugged a speaker into a 120vac

Re: [time-nuts] Frequency counter questions

On Mon, Apr 24, 2017 at 5:16 PM, Bob kb8tq wrote: > Hi > > > > On Apr 24, 2017, at 6:54 PM, Hal Murray wrote: > > > > > > kb...@n1k.org said: > >> You have a “gate” from the GPSDO and a “signal” from somewhere else. If > you > >> want the STM to do the

Re: [time-nuts] Frequency counter questions

Hi Jerry, See AN4776 on st.com. Section 2.6 looks particularly interesting. Orin. On Mon, Apr 24, 2017 at 12:06 PM, Jerry Hancock wrote: > This is an exercise more than anything. It started when I noticed the > counter in a 3586B I purchased was +1 count unless I dropped

Re: [time-nuts] HP E1938

Re: schematic. There's a link on the second ebay auction page: http://www.prc68.com/I/pdf/E1938pdfdocs.zip On Sat, Apr 15, 2017 at 10:42 AM, Larry McDavid wrote: > Ok, so a standard DB 25-pin socket-contact connector will mate with the > on-board connector with the center

Re: [time-nuts] ADEV query Timelab and TICC

On Sun, Mar 19, 2017 at 8:03 PM, Tom Van Baak wrote: > > Thanks for the raw data. It's very nice (2 hours 16 minutes = 8219 > points). Everything looks fine with the exception of 8 glitches. These are > sometimes obvious jumps in phase, which cause massive spikes in

Re: [time-nuts] ADEV query Timelab and TICC

On Sun, Mar 19, 2017 at 3:00 PM, Tom Van Baak wrote: > > I've seen similar with my TICC when observing a PPS - can't remember > > whether the PPS was from the Thunderbolt or LTE Lite. > > > > There was a distinct glitch on the frequency plot when it happened and it > > was

Re: [time-nuts] ADEV query Timelab and TICC

I've seen similar with my TICC when observing a PPS - can't remember whether the PPS was from the Thunderbolt or LTE Lite. There was a distinct glitch on the frequency plot when it happened and it was pretty easy in timelab to expand the trace around the glitch to take a better look. I did not

Re: [time-nuts] My TICC came in the mail yesterday

FWIW, here is a quick test I ran on my TICC, assuming the attachment makes it. "TICC base" was a Trimble Thunderbolt reference and PPS. The reference for the other traces was an FE-5680A with an LTE Lite on ChA and Trimble PPS on ChB. The GPS antennas are indoors and entirely sub-optimal. The

Re: [time-nuts] Low CostTemperature sensor

Directly proportional implies a relationship of the form y = c * x where c is a constant and * is multiplication. So it is linear. To call an exponential relationship "directly proportional" would be wrong. On Tue, Jan 17, 2017 at 1:17 AM, Charles Steinmetz wrote: > Tom

Re: [time-nuts] wifi with time sync

I merely used the ping to demonstrate Wireshark's packet time stamping (though in this case, it seems that the router responds immediately). FWIW, a couple of NTP packets got captured too with a 34 ms round trip. I was actually looking for an ARP request/response in consecutive packets on the

Re: [time-nuts] wifi with time sync

You could run a network monitor, Wireshark for example... https://wiki.wireshark.org/CaptureSetup/WLAN There are specialized WIFI capture programs, but they tend to be designed to break into networks rather than monitor performance - kismet/kismac. I run them every so often to check for

Re: [time-nuts] Lady Heather Ver 5 Problem

For a little more detail see WSA_NODATA here: https://msdn.microsoft.com/en-us/library/windows/desktop/ms740668(v=vs.85).aspx The explanation is rather difficult to parse. It seems it's indicating that an MX record was found (somewhere you could send email) but no A record (a server you could

Re: [time-nuts] Vintage Quartz Crystal Manufacturing

Actually, there is a 37 before the last digits, so they are 3720, 3760 and 3780 kHz. On Sat, Nov 26, 2016 at 7:15 AM, Bob Camp wrote: > Hi > > Welcome to eBay ….. > > I don’t believe those are crystals at all. If you take a look at the > markings on the parts > they are labeled

Re: [time-nuts] DIY VNA design

To 60MHz: http://n2pk.com; PCBs available here: http://www.makarov.ca/vna.htm To 500MHz, lower dynamic range to 1.3GHz: http://sdr-kits.net/VNWA3_Description.html OK, so the latter isn't build it yourself anymore. I have version 2.6 of the latter and it works really well to about 575MHz. Traces

Re: [time-nuts] Working with SMT parts.

On Fri, Aug 12, 2016 at 7:25 PM, Brooke Clarke wrote: > Hi Chris: > > ExpressPCB has very easy to use free software for schematic capture (later > used to check the board wiring) and software for board layout including > making custom components if their library of stock

Re: [time-nuts] HP5370 power supply measurements

On Fri, Jul 15, 2016 at 10:55 AM, Poul-Henning Kamp wrote: > > In message < > cany2ixq6onvridofgnfkebqjdkntp7t8kue7boupxjwlcux...@mail.gmail.com> > , "William H. Fite" writes: > >David Kirkby scripsit: > >> > >> I often here of people replacing fans with quiter

Re: [time-nuts] RS232 / GPS interface/prototyping board

On Wed, Jun 22, 2016 at 3:14 PM, Nick Sayer via time-nuts < time-nuts@febo.com> wrote: > > > On Jun 22, 2016, at 1:33 PM, Mark Sims wrote: > > > > The value, quality, and turn-around from all these places is amazing. > In the olden days, one was paying $50 a square inch for

Re: [time-nuts] Maser 0.7 nsec jumps solved

On Wed, May 25, 2016 at 9:59 AM, Mike Monett wrote: > >Am 23.05.2016 um 05:15 schrieb Jim Palfreyman: > >> As far as a remedy goes we are going to try a solid state relay that > only > >> switches on at 0V in the AC waveform. This should slow the inrush > current, >

Re: [time-nuts] Raspberry PI 3 NTP server with GPS time data.

On Sun, Apr 24, 2016 at 4:15 PM, Chris Albertson wrote: > Did you see the notice on the adafruit 2324 web page that reads "Does > not work with the Pi 3 at this time". > I would assume that's because the Pi3 uses /dev/ttyAMA0 for Bluetooth. Here is how to route

Re: [time-nuts] Lady Heather coming soon to a Linux box near you...

On Wed, Apr 20, 2016 at 10:13 PM, Mark Sims wrote: > > One thing that will probably not be supported is sound file support... > playing .WAV files asynchronously does not seem to come naturally to > Linux. Does anybody know of a simple / lazy bastard way to play a sound >

Re: [time-nuts] How to run Lady Heather under Windows10

If you want to argue about FTDI, please take it over here: http://www.eevblog.com/forum/microcontrollers/ftdi-gate-2-0/ On Fri, Mar 18, 2016 at 10:36 AM, Dan Kemppainen wrote: > Hi, > > Sorry, I have to speak up here. This fake stuff isn't "clone" FTDI > hardware. It

Re: [time-nuts] Thinderbolt 10 Mhz output level?

I have now: +11.7 dBm on the 8568A spectrum analyzer with 2nd & third harmonics at -60 dBc. So yes, mine is a dB or two above +10dBm. Orin. On Tue, Jan 19, 2016 at 6:29 PM, Chris Arnold via time-nuts < time-nuts@febo.com> wrote: > Has anyone actually measured the 10 Mhz level on their

Re: [time-nuts] Lady Heather Server On Raspberry Pi 2 Model B?

Well, you can run Windows 10 on the Pi... As the question was running LH Server, perhaps it could be compiled as a "Universal" Windows app. On Sat, Jan 9, 2016 at 6:36 AM, Chuck Harris wrote: > Unfortunately, LH uses a graphics toolkit that was written by > John Miles, and

[time-nuts] SRS FS710 10MHz distribution amp

I see a couple on eBay, already bid up to $150. Seems rather a lot, but what do I know. The manual, including schematic is here: http://www.thinksrs.com/downloads/PDFs/Manuals/FS710m.pdf Comments? Orin. ___ time-nuts mailing list --

Re: [time-nuts] LAN/USB to GP-IB/HP-IP Adapters

I have successfully used an Agilent 82357B USB adapter - there are plenty on eBay from Chinese sellers... I got NI Visa to talk to Agilent, er, Keysight IO Libraries and access a 3456A attached to the 82357B. That's the simplified version... the 82357B was on a remote system over a WiFiI link

[time-nuts] Another KS-24361 REF1 DOA, investigation

I ended up with a dead REF1, so I decided to investigate. The -15V was at -0.6V and the 15V at 3.5V. The power module was hot to the touch. Then I found Bob Stewart's post from a few months back, so I decided to pull the power module and check the capacitors. First, I measured the resistance

Re: [time-nuts] HP5335A GPIB questions.

The 5335A is fussy. FWIW I used the following init string: IN,FN1,WA1\n Important: I then wait for 125 ms; that being the total time for IN,FN1,WA1 to execute per the 5335A manual. Only then, do I try to read data from the instrument. Pay careful attention to the times that commands take and

Re: [time-nuts] If your 5335A is acting goofy or dead...

or two. Orin. On Sat, Dec 27, 2014 at 9:06 PM, Orin Eman orin.e...@gmail.com wrote: While evaluating my LTE Lite and testing my buffer board, my 5335A started acting goofy - random hangs/crashes etc.. This morning, the fan came on, but no display. To make a long story short, the problem

Re: [time-nuts] If your 5335A is acting goofy or dead...

stellar performance, but usually that is not needed. Where did you find the Service Note? Cheers, Magnus On 12/28/2014 06:06 AM, Orin Eman wrote: While evaluating my LTE Lite and testing my buffer board, my 5335A started acting goofy - random hangs/crashes etc.. This morning, the fan came

[time-nuts] If your 5335A is acting goofy or dead...

While evaluating my LTE Lite and testing my buffer board, my 5335A started acting goofy - random hangs/crashes etc.. This morning, the fan came on, but no display. To make a long story short, the problem was exactly as described in Service Note 5335A-26B. I found evidence of overheating on the

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

based off it, please attribute the source.) Orin. On Sat, Dec 6, 2014 at 10:32 PM, Orin Eman orin.e...@gmail.com wrote: Hi Said, It's a little while since you sent this, but I just finished some testing with the LTE Lite. I already had a Trimble Thunderbolt and also have an HP 5335A with OCXO

Re: [time-nuts] Cheap 5370A on eBay

On Sat, Dec 20, 2014 at 12:12 AM, Poul-Henning Kamp p...@phk.freebsd.dk wrote: In message blu170-w651e405ea49cc0fe9e42d0ce...@phx.gbl, Mark Sims writes: I believe there are 5370 ROM dumps on KO4BB.COM They're also in the BBB-5370 repos. I few years back i posted on this forum

[time-nuts] Cheap 5370A on eBay

#151518774079 Currently at $49.95 plus shipping. It's showing a ROM error (7.7) on startup. I asked what the error was this morning and they posted pictures this afternoon. It could be a candidate for one of John Seamons' 5370 processor replacement boards assuming nothing else is wrong. I

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

On Mon, Dec 8, 2014 at 11:07 AM, Byron Hayes Jr bha...@earthlink.net wrote: So, I brought out Big Gonzo, a HP 5335A counter with Option 010 (Hi-Stability time base) I purchased on eBay about six months ago but had never fired up. It came up OK and I hooked it to the LTE-Lite output. It

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

Hi Said, It's a little while since you sent this, but I just finished some testing with the LTE Lite. I already had a Trimble Thunderbolt and also have an HP 5335A with OCXO. The 5335A has shown the Trimble O/P 10 MHz +/- 0.03 Hz for the last few years (displayed frequency on the 5335A has

Re: [time-nuts] LTE-Lite

On Fri, Nov 28, 2014 at 3:42 PM, Hal Murray hmur...@megapathdsl.net wrote: kb...@n1k.org said: The “new chip ID, new com port” thing is pretty typical for the FTDI drivers. If you plug the old LTE back in there’s a good chance it will come back up as COMM 5. Usually they are pretty good

Re: [time-nuts] Si570 question

I have one of these: http://sdr-kits.net/PA0KLT_Description.html built with the CML output Si570 that goes to 1417 MHz (!) There is a schematic in the assembly manual that's linked to from that page. They use 100n and 1n capacitors in parallel on Vdd and 4K7 pullups on SCL/SDA. They have 100n

Re: [time-nuts] Lord Vetinari wall clock

I made one and replaced a normal wall clock at work. No-one really noticed unless it was pointed out. I got it from here: www.akafugu.jp/posts/products/vetinariclock/ Out of stock at the moment though. On Sun, Nov 2, 2014 at 5:59 AM, Bob Camp kb...@n1k.org wrote: Hi We’ve gone around on

Re: [time-nuts] ARM boards for low-cost GPSDOs

On Thu, Apr 10, 2014 at 4:40 PM, Chris Albertson albertson.ch...@gmail.comwrote: 3) TI sells a Launch Pad at a very good price, about $13 and it is VERY well supported with training materials, software and so on. I'm sure TI iix taking a loss on these. They can't be making money at $13

Re: [time-nuts] First success with very simple, very low cost GPSDO, under $8

On Wed, Apr 9, 2014 at 2:08 AM, Hal Murray hmur...@megapathdsl.net wrote: hol...@hotmail.com said: I'm not sure how the Arduino environment handles interrupts, but in C you need to declare any variables altered by an interrupt as volatile so that the compiler optimization routines know

Re: [time-nuts] First success with very simple, very low cost GPSDO, under $8

On Wed, Apr 9, 2014 at 11:03 AM, Chris Albertson albertson.ch...@gmail.comwrote: On Wed, Apr 9, 2014 at 2:08 AM, Hal Murray hmur...@megapathdsl.net wrote: Also any code that accesses them needs to do so with interrupts turned off... otherwise you can wind up with corrupted values.

Re: [time-nuts] Rb as source for ADEV?

Bob, If you want a C++ class to talk to the Prologix Ethernet, I have one. (I don't have a USB version, but that would just be a matter of implementing a simple subclass to do the communication with the device.) I also have code that uses the above and talk to a 5335A and to a 5370A, both of

Re: [time-nuts] ThunderBolt Display - Update

My test for this kind of thing is: Would it be OK if a frequent contributor to the list had posted the same information?. I.e. is the information of interest to the list? In this case, I'd say yes and I have no problem with it being posted here. If he posted the same information every week, it

Re: [time-nuts] ThunderBolt Display - Update

Enough already. As ever, the followups are worse than the original offense, if any. Robert should not have forwarded Adam's reply to the list, but since he did, note that _another list member_ suggested that Adam post the information here. Nice welcome. Not. Orin, KJ7HQ.

Re: [time-nuts] FE-5680A Voltage?

Yes, my reading of the datasheet was the same. 18V in would be fine for 15V output. My concern would be how noisy the output would be. I have 9 of the from China ebay boards here (gave one to my boss to play with). I should wire one up and take a look. At any rate, I think a turn or two of

Re: [time-nuts] DIY HP/Agilent 53131A 010 High Stability Timebase Option

On Wed, Aug 28, 2013 at 9:30 AM, Richard (Rick) Karlquist rich...@karlquist.com wrote: I have an 18 GHz HP 5342A frequency counter, which I don't seem to see a lot, as members of my radio club borrow it. But it has no oven. There is an option for an oven, but my model does not have the

Re: [time-nuts] SDR Radio Opinion- Next Question

Take a look at http://en.wikipedia.org/wiki/Xenix Microsoft DID sell a re-branded Unix. On Tue, Aug 6, 2013 at 2:34 PM, Chris Albertson albertson.ch...@gmail.comwrote: Yes, I'm writing this on an iMac. I'm a long time BSD Unix user going back to about 1980. Now, FINALLY we can say the

Re: [time-nuts] HP 10811 update

I find it hard to believe that NTE spec the 123AP to replace a transistor with min beta of 500... This is quite entertaining: http://www.vetco.net/catalog/product_info.php?products_id=1856 Look at the parts it's supposed to replace. (Nothing against Vetco - they are a great source of NTE

Re: [time-nuts] Spectrum Analyzer Suggestions

On Mon, Jul 15, 2013 at 7:37 AM, David Kirkby david.kir...@onetel.netwrote: On 15 July 2013 14:19, Robert LaJeunesse rlajeune...@sbcglobal.net wrote: Rigol, unlike most of the Asian based manufacturers, does have a support office in the States. They have also had a noticeable presence at the

Re: [time-nuts] HP 5370B Leds pulsing slowly, buttons selecting normally, PB LEDS scannning and appears to be reading o/k

What's the specified tolerance on the 17,000 uF? You probably have quite a range to work within. If you are lucky, they specified something like +80/-20% and the 29,000 uF might be OK (measure it). On Sat, Jul 6, 2013 at 4:18 AM, Mark C. Stephens ma...@non-stop.com.auwrote: C3 (17000uf @

Re: [time-nuts] OT Prototype Boards

0.1 is 2.54mm by definition these days. See: http://en.wikipedia.org/wiki/International_yard_and_pound Now whether the board really is 2.54mm is an entirely different matter... if it is, you should be fine with 0.1 pitch chips. Orin. On Mon, Jun 24, 2013 at 9:10 PM, Bob Stewart

Re: [time-nuts] Good (cheap) PIC chip choice for project?

On Sun, May 26, 2013 at 4:50 AM, Bob Camp li...@rtty.us wrote: Hi One of the original starting points was a free tool chain. Paying major money for a compiler is moving a bit far from that. You would have to do a *lot* of home projects to justify that cost. Indeed. I wouldn't pay

Re: [time-nuts] Good (cheap) PIC chip choice for project?

On Sat, May 25, 2013 at 6:39 PM, Didier Juges shali...@gmail.com wrote: While I have often said that I have more time than money, I still consider that my time is too scarce (or valuable) for assembly language. My opinion is that the language for small embedded devices is C. Some may

Re: [time-nuts] Net4501's cheap..

There were two auctions... the $59 ones are new, the others lightly used. Now there are only the new ones left. On Sun, May 19, 2013 at 7:10 PM, Tom Clifton kc0...@yahoo.com wrote: Seller obviously figured out that somebody feels they are of value and adjusted the selling price to see what he

Re: [time-nuts] Signal Hound

There is a yahoo group for the Signal Hound. For one user, the original Signal Hound showed really poor phase noise performance with an external reference with the internal reference always being better... see the External ref vs internal ref.pdf document on the yahoo group for details. The plot

Re: [time-nuts] Win XP and NIST time

On Wed, Mar 27, 2013 at 9:46 AM, Dan Kemppainen d...@irtelemetrics.comwrote: As for timing things on windows, check out how to read the performance counters in windows. I believe these are QueryPerformanceCounter and QueryPerformanceFrequency in kernel32. In most modern systems these should

Re: [time-nuts] 2.5 Ghz 12 digit counter project

On Thu, Dec 27, 2012 at 6:45 PM, Tom Harris celephi...@gmail.com wrote: Watch out for Silicon Chip designs, they have a habit of not making the source code available, which you only find out at the end of the project. I suppose that it is to allow the author to make a few extra $$ selling

Re: [time-nuts] For my whole life timezones have been weird

On Sat, Nov 3, 2012 at 9:24 AM, Jim Lux jim...@earthlink.net wrote: On 11/3/12 8:50 AM, Chris Albertson wrote: That is the root cause of all Window's problems. The company was run be a chief software architect who technically very ignorant and lacked any formal education in the subject.

Re: [time-nuts] WWVB New Modulation scheme...

Looks like they _might_ have been 30 _Hz_ out... I had to tune to 1188.97 to get a 1kHz beat in upper sideband mode a few minutes ago but they are within 10Hz of where they are supposed to be now - according to my radio anyway (I just checked the radio against WWV at 5MHz and it was less than 10Hz

[time-nuts] Wavetech/Wavecrest DTS-2010

There was some discussion of the DTS-207X recently. There is a DTS-2010 on ebay for $265. Anyone know about this model? The usual searches come up empty. Orin. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to

Re: [time-nuts] WWVB Format Ownership

On Thu, Sep 27, 2012 at 7:15 PM, Peter Gottlieb n...@verizon.net wrote: Not quite sure about the analog to health care, but certainly a transmission being public domain doesn't mean much if the only possible way to use it is proprietary. Sounds like something Microsoft would strive for. I

Re: [time-nuts] Motorola UT+ Interface Board

On Mon, Aug 13, 2012 at 6:31 PM, Chris Albertson albertson.ch...@gmail.comwrote: On Mon, Aug 13, 2012 at 6:20 PM, paul swed paulsw...@gmail.com wrote: impressive Shame there is not a buy now. 1cent plus $4 shipping and you have to wait 2 days to see if you won the bid. Or am I missing

Re: [time-nuts] 10 MHz low pass filter

A little delayed, but here's a sweep to 500MHz: https://picasaweb.google.com/lh/photo/-wJRN8e2ugrxVVtMxqYI49MTjNZETYmyPJy0liipFm0?feat=directlink 1.2 dB loss at 10MHz. Something going on at 347MHz. If I get chance, I'll do a sweep to 1GHz. Orin, KJ7HQ. On Wed, Jun 20, 2012 at 4:17 PM, Thomas

Re: [time-nuts] Antenna for T-bolt

There are still some listed at GBP 19.00. Search for lucent 40db. Orin. On Mon, Apr 2, 2012 at 4:14 PM, Pete Lancashire p...@petelancashire.comwrote: All gone .. I got one. I'm happy for $26 but the thing was pretty badly treated in its life and the seal did not look well. If yours is as

Re: [time-nuts] OT - Portable Digital 'scope

On Thu, Feb 23, 2012 at 2:22 PM, Azelio Boriani azelio.bori...@screen.itwrote: Actually, undersampling does use the alias effect to bring down the RF carrier. That is, the direct sampling radio concept cannot avoid the aliasing: it is exploited to avoid, for example, to sample a 2GHz carrier

Re: [time-nuts] 32768 Hz from 10 MHz

On Fri, Feb 3, 2012 at 1:08 AM, Dennis Ferguson dennis.c.fergu...@gmail.com wrote: On 3 Feb, 2012, at 14:15 , Orin Eman wrote: On Thu, Feb 2, 2012 at 7:16 PM, Hal Murray hmur...@megapathdsl.net wrote: It's possible to use Bresenham with two integers 10,000,000 and 32,768 but I

Re: [time-nuts] 32768 Hz from 10 MHz

On Thu, Feb 2, 2012 at 7:16 PM, Hal Murray hmur...@megapathdsl.net wrote: It's possible to use Bresenham with two integers 10,000,000 and 32,768 but I found no way to perform all the 24-bit calculations on an 8-bit PIC quick enough. Removing the GCD often helps but in this case the

Re: [time-nuts] Prologix GPIB-ETH - Linux examples ?

On Mon, Jan 30, 2012 at 11:23 AM, cfo xne...@luna.kyed.com wrote: I just got my Prologix GPIB-ETH I am 90% Linux Ubuntu based , and would like to get 99% based. So i am looking for some C code examples, implementing the linux networking part. I have sen the Prologix example C/C+ , but it's

Re: [time-nuts] Invitation to connect on LinkedIn

On Wed, Jan 25, 2012 at 2:13 PM, J. Forster j...@quikus.com wrote: I have had no contact with Scott Dennis either, AFAIK. LinkedIn went through his Address Book and/or Inbox and harevested all the email addresses therein, then spammed them all of them. I doubt that. LinkedIn provides a

Re: [time-nuts] NTP for 64 bit windows

On Tue, Jan 17, 2012 at 8:17 AM, Chris Albertson albertson.ch...@gmail.comwrote: Can't you build the reference version 64 bit?Have you tried. That said, I don't see why you'd need a 64-bit version. NTP is never going to use so much RAM that you need the wider address space. I don't

Re: [time-nuts] NTP for 64 bit windows

On Tue, Jan 17, 2012 at 10:30 AM, li...@lazygranch.com wrote: The intel 64 bit CPUs used the AMD64 instruction set. There are still some Itaniums around (which are not AMD64) which is why I made an exclusion for non-x64 architecture. Note there are more instructions in the 64bit

Re: [time-nuts] Internal 5 volt switching regulator on some non-programmable FE-5680A's

On Sun, Jan 8, 2012 at 1:51 PM, Clint Turner tur...@ussc.com wrote: Hello, After posting a few days ago about one of my '5680A's having the voltage converter installed - but not connected - I've done a bit of reverse-engineering and sleuthing around and (probably) have a fairly complete

Re: [time-nuts] Power supply for 'Bay FE-5680A?

On Thu, Jan 5, 2012 at 6:11 PM, time-n...@custodes.info wrote: Thanks, but what are people using to feed it? I'm having trouble pinning down power requirements. http://www.freqelec.com/rb_osc_fe5680a.html says 32W peak, but then also 15-18v@700mA, which doesn't make sense. I'm still waiting

Re: [time-nuts] crunching numbers from XOR phase detector

Have you tried the 74HCT9046? They claim no dead zone. Note - seems to be HCT only. Orin. On Wed, Jan 4, 2012 at 9:32 AM, Brian Justin wa1...@att.net wrote: Be very careful of the FPD in the 4046. It has a dead-zone when the phase error is at or very close to zero. Some versions of the

Re: [time-nuts] FE-5680A Results so far

On Wed, Dec 28, 2011 at 11:14 PM, mike cook michael.c...@sfr.fr wrote: 1) What is the expected 10MHz peak to peak voltage. FEI doc seems to indicate 0,5V but I am getting only 200mv. 2) What is the sensitivity to 15V input level. I am only measuring 14,722 (stable) on Pin1. 3) Could this

Re: [time-nuts] Clocking a PIC16F628A from a Rubidium Standard

On Fri, Nov 25, 2011 at 1:21 PM, Robert Atkinson robert8...@yahoo.co.ukwrote: Hi, Microchip cerainly condone using input protection diodes of PIC devices as clamps. There are application notes for zero-crossing detection which connect the input to the 115V AC line via a resistor. Note that

Re: [time-nuts] Clocking a PIC16F628A from a Rubidium Standard

On Fri, Nov 25, 2011 at 12:17 AM, Attila Kinali att...@kinali.ch wrote: On Thu, 24 Nov 2011 12:05:13 -0700 Kevin Rosenberg ke...@rosenberg.net wrote: Since frequency reference sine wave can exceed Vdd, you want to current limit the external clock. For example, an unterminated TBolt puts

Re: [time-nuts] Lucent RFTG-m-XO GPSDO

On Sun, Oct 9, 2011 at 6:55 AM, EB4APL eb4...@cembreros.jazztel.es wrote: Peter, My UT+ works ok with common antennas, I tested it with a Trimble 28367-00 and with a INPAQ AAF-03B 5V. Both are quite old garden variety GPS antennas intended for car navigators so your problem can be in the