Re: [time-nuts] Virgin time nutter fell at the first M12+ hurdle

Note however that the M12+T’s I/Os are 3V, not 3.3V and not 5V. On Jun 11, 2014, at 19:46 , paul swed wrote: > Chris is correct many GPS receivers do not output anything till queried. > Further it seems the TX and RX data may need to be swapped. That has bagged > me a few times because it depend

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

Certainly. However I was addressing only the measurement capabilities of the timer with regard to its width, not the overall operation of the system. > On Apr 10, 2014, at 15:52, "Tom Miller" wrote: > > Don't you also need to wait for the GPS at first power up? > > - Original Message ---

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

Precisely my point. My oscillator's tuning range and the timer frequency and the sampling interval dictated the minimum number of timer bits needed. In my case, as I recall, eight was not enough. Once locked, yes, but not initially. > On Apr 10, 2014, at 14:26, Hal Murray wrote: > > > kd0...

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

I should have said warm start, not cold. I was referring to the code, not the oscillator. So tell me, the OCXO is warm, there's no previous EFC information to draw upon, and the oscillator is off-frequency by more than can be measured with, let's say eight timer bits. What do those early measure

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

In my case, the cold-start frequency of my OCXO with EFC at midpoint was off sufficiently far that I needed a minimum number of remainder bits to know which way to initially steer it. Don't recall the exact number I needed, but it was more than eight at 10 MHz. Like this design, I had 16 bits to

Re: [time-nuts] new GPSDO kit

Said, I looked through the literature on your website, but didn't see any pictures of the inside of the unit. I'm curious to see the board and component compliment. Regards, Brent > On Apr 4, 2014, at 20:19, Said Jackson wrote: > > Paul, > > Forgot to mention, there is a spec sheet on the web

Re: [time-nuts] M12+T module questions

Jim, Can't help you with the on-board battery as my M12+T's were the optional external battery types. But as for the connector, I got both PCB-mount and IDC-type cable assemblies as free samples from Samtec. Can't seem to find the part numbers at the moment but can dig for them if you need. The

[time-nuts] FS: C-MAX CME6005 Receiver ICs

, please contact me "off-list" to make arrangements. It is my hope that these parts will find their way into the hands of hams, time-nuts and other WWVB users who will put them to good use in their projects. 73, Brent / KD0GLS ___ time-nuts ma

Re: [time-nuts] +12 Volts 1A (plus a bit) supply?

er modules available. .73, Brent, KD0GLS, Minneapolis On 27 Jun 2013, at 13:51, Bob Stewart wrote: > The transformer gives me about 20 volts DC out. Dropping 8 volts at 1 amp is > just a lot of power to void with a resistor. I'd like to avoid having that > much waste heat in the unit.

Re: [time-nuts] GPS Receiver M12M question

-second window. 73, Brent, KD0GLS, Minneapolis On 27 Jun 2013, at 11:50, Martyn wrote: > Hello, > > I have been asked the following by a customer: > > The M12M GPS receivers have two ways of compensating for antenna delays. > > The @@AY and the @@Az commands. > >

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

ations, I would never conclude that well written C "doesn't do well" on PIC16s. Furthermore, today's PIC16F product line is quite broad, including several higher-performance parts which make coding in C even more attractive. They aren't all "old" and all "

Re: [time-nuts] Server Issues?

Yes. My most recent post showed up many hours (maybe six or eight) after I sent it. That was perhaps two or three weeks ago. 73, Brent, KD0GLS, Minneapolis On 20 May 2013, at 18:18, J. Forster wrote: > Is anyone else seeing posts to this list showing up many hours to days late? > &

Re: [time-nuts] Cesium "wrist-watch-lite"

Interesting... I never even received a response from Symmetricom to my request for a quote. But I do now regularly receive their sales emails. On May 2, 2013, at 12:22, Jonatan Walck wrote: > On 2013-05-02 14:18, Poul-Henning Kamp wrote: >> In message <5182325e.4020...@t-online.de>, Volker Esp

[time-nuts] GPS Patch Antenna Electrode Tarnish

ve seen it mentioned in various data sheets that tarnish will of course affect solderability, but no mention of signal loss. Thanks in advance. 73, Brent, KD0GLS, Minneapolis ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, g

Re: [time-nuts] SSR-6t Connector

Thanks for mapping that out Dale. I'm sure it's no coincidence that that pinout is the same as that of Microchip's PICkit3 (et al.) programmer. 73, Brent, KD0GLS, Minneapolis On 5 Jan 2013, at 11:38, Dale J. Robertson wrote: > That header is used for programming the on bo

Re: [time-nuts] SSR-6t Connector

Thanks to all who replied with that part number. Come to think of it, if anyone has any (moderately high-res) photos of the front and back of the board, those would be great to see as well. 73, Brent, KD0GLS, Minneapolis On 21 Dec 2012, at 15:06, Dale J. Robertson wrote: > PIC i

Re: [time-nuts] SSR-6t Connector

I'm looking at Synergy's Tech Note #493 for the SSR-6Tr and trying to make out the part number of the PIC from the picture. Looks like it might be a PIC24F part. Would appreciate knowing the actual part number from one of you who's already received your board. 73, Brent, KD0G

Re: [time-nuts] WWV

Brad, Could you please elaborate on what exactly you heard, and when, so we can keep our ears ready? On Aug 22, 2012, at 11:30, Brad Dye wrote: > Thought you guys might like to read this and maybe send them some more > reports: > >> -Original Message- >> From: Brad Dye [ >> mailto:b..

Re: [time-nuts] L1 GPS timing signal(s) into local time on computer(s)

In my experience (which is admittedly less than that of many others here) the time reported is that of the PPS pulse that just happened, and the documentation usually bears that out. There's a real-time clock running inside the receiver that is synchronized to the PPS. At the top of the second,

[time-nuts] Online Nixie Clock

Tom, Your online Nixie clock started counting backwards UTC time after the leap second occurred, as in when the Enterprise was in a time warp. Sent from my iPod ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com

Re: [time-nuts] GHz output from fe5680a

Ken, I sent you an email with all three documents attached. Did you not receive them? .73, Brent, KD0GLS, Minneapolis On 31 Jan 2012, at 18:03, ken johnson wrote: > Thanks for the reply Steve- yes, I can access nasa.gov and nist.gov ok, but > no matter which way I try, tf.nist.gov jus

Re: [time-nuts] C-Max Receiver Experiment

Justin, A while back, I did some crude experiments with the C-Max CME6005 IC which is, I believe, used in that evaluation module. If memory serves, there were some rather severe restrictions documented in either the datasheet or an application note regarding the loading on the TCO/TCON pins. As

Re: [time-nuts] DDS - Cosine v. Sine LUT

ator rollover - a sine LUT > would potentially show an abrupt change in dv/dt (slew rate) with the > frequency change. By using a cosine LUT the signal would be at its peak, and > dv/dt would be virtually zero both before and after the frequency change. > > Bob LaJeunesse >

Re: [time-nuts] DDS - Cosine v. Sine LUT

ons) for the two devices suggests they are clearly calling out one or the other, but without rationale regarding the choice. .73, Brent, KD0GLS, Minneapolis ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi

[time-nuts] DDS - Cosine v. Sine LUT

would one device favor a cosine LUT versus a sine LUT? On the surface, starting the roller coaster ride at the top of the hill (assuming the phase accumulator starts from zero) seems odd. .73, Brent, KD0GLS, Minneapolis ___ time-nuts mailing list --

Re: [time-nuts] Pitfalls of Digital 'Scopes

hat digital scopes do not always accurately depict > what a circuit is doing. Even a $50 analog 'scope would never have this > issue. > > FWIW, > > -John > > === > > > ___ >

[time-nuts] Wanted: Vincotech/Tyco A1035-D GPS Module

the particulars. Thanks for the bandwidth! .73, Brent, KD0GLS, Minneapolis ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.