Re: [time-nuts] LH Z3801 and XP stalling

Not meaning to beat this dead horse any farther than I have to, but it worked fine under Windows XP, 7, and Linux. It only came to have a problem after the Windows 10 upgrade the MS forced on the machine one summer day. The cure was to shut off the power saving features. OBTW, the hub of which

Re: [time-nuts] HP 10811 40 Hz low.

Great comments. I can confirm the oven behaviors. The out is not needed. It is controlled from the micro and warms slowly at about 17 volts. Gets to 150 F after a solid hour as long as its insulated other wise it has a hard time keeping up with ambient air. The 10811 does heat quickly to the 85C.

Re: [time-nuts] LH Z3801 and XP stalling

Most older laptops have power saving hardware on the com ports and the lpt ports too! Try putting a blinky box on the port to see if the signals stay lit through the stall. -Chuck Harris paul swed wrote: > Thanks everyone. > However on the dell laptop its an actual rs232 port. They used to

Re: [time-nuts] HP 10811 40 Hz low.

Hi The “outer oven” on the Z3801 10811’s is simply a warmup heater to improve performance when the unit starts at -40C. When operated as designed, it is effectively “gone” in normal operation. The 10811’s normal oven circuit (“inner oven”) on the modified 10811 is still what does all of the

Re: [time-nuts] GALILEO online: any changes seen?

From: Mark Sims Fire up Lady Heather v5, start it with the -rxu option to speak Ublox binary. Enter the keyboard command SG. That will let you see which GNSS systems are in use and let you change them. My M8 (fw 3.01) lets me select Galileo, but I see no Galileo sats. To get the

Re: [time-nuts] HP 10811 40 Hz low.

I had a reference problem on my Z3801A years ago, and ultimately found that the opamp that controls the 10811 oven temperature was bad. I think it turned out there was a bad batch of certain date codes. Replacing the IC with an equivalent type fixed it right up, with no other changes or

Re: [time-nuts] LH Z3801 and XP stalling

On 12/16/16 6:33 AM, Chuck Harris wrote: A customer's 'doze 7 computer got auto updated to 'doze 10, and with that upgrade came a usb hub that timed out, turning itself off the only problem was, the keyboard and mouse were on that hub, leaving no way to signal the computer to turn the hub

Re: [time-nuts] LH Z3801 and XP stalling

Thanks everyone. However on the dell laptop its an actual rs232 port. They used to include those. :-) I am thinking of trying a usb port to see if that works. It is all working nicely on a acer windoze vista laptop.But the machine I normally use for this stuff is the dell laptop. Regards Paul On

[time-nuts] GALILEO online: any changes seen?

Fire up Lady Heather v5, start it with the -rxu option to speak Ublox binary. Enter the keyboard command SG. That will let you see which GNSS systems are in use and let you change them. My M8 (fw 3.01) lets me select Galileo, but I see no Galileo sats. To get the receiver back to NMEA,

Re: [time-nuts] Temperature weirdness with Thunderbolt & Lady Heather 5

On 12/16/2016 1:54 PM, wb6bnq wrote: > Hi Pete, > > Are you really at an altitude of 645 meters ? Yes. That's the result of multiple surveys over a week a year or two ago. I'm pretty sure the altitude hasn't changed since then. :) I think Lady Heather shows the altitude as that above the WGS84

Re: [time-nuts] LH Z3801 and XP stalling

A customer's 'doze 7 computer got auto updated to 'doze 10, and with that upgrade came a usb hub that timed out, turning itself off the only problem was, the keyboard and mouse were on that hub, leaving no way to signal the computer to turn the hub back on. Ultimately, the customer found that

Re: [time-nuts] LH Z3801 and XP stalling

On 12/15/16 7:08 PM, Chuck Harris wrote: Sometimes, when one is doing a long run that goes past the usual power save times, the USB port will shut itself off. I believe that most motherboards have a setting in the BIOS that controls the ability of the BIOS to power the USB port down during

Re: [time-nuts] Temperature weirdness with Thunderbolt & Lady Heather 5

Hi > On Dec 16, 2016, at 3:21 AM, Pete Stephenson wrote: > > On 12/15/2016 7:45 PM, Charles Steinmetz wrote: >> Tom wrote: >> >>> There's something very odd going on here, either with Pete's TBolt, >>> and/or with Mark's Heather v5. >>> >>> 2) It also shows some truly

Re: [time-nuts] Temperature weirdness with Thunderbolt & Lady Heather 5

Hi Pete, Are you really at an altitude of 645 meters ? Also, it seems that your oscillator gain (currently at -5 Hz/v) may not be set right ? Have you checked the power supply voltages and observed them on an oscilloscope to see if they are relatively clean and free of spurious junk ? The

Re: [time-nuts] HP 10811 40 Hz low.

Hi If it is a crystal, a broken seal on the can is a pretty good guess. Often this runs up the resistance as well. Bob > On Dec 15, 2016, at 8:57 PM, paul swed wrote: > > Bob > Took your advise and did check all of the caps in teh oscillator along with > resistors. All

Re: [time-nuts] GALILEO online: any changes seen?

David, several of your satellite count graphs show a slow upward trend throughout this calendar year, with a bump up for the month of October, falling back down for part of November, then another step up at the beginning of December. http://www.satsignal.eu/mrtg/performance_gps.php?period=year

Re: [time-nuts] GALILEO online: any changes seen?

The key change is that now there is a "Service definition document" for each service entering Initial Services. Thus there is a Quality (or lack) of service defined for each signal. --      Björn Sent from my smartphone. Original message From: Tim Shoppa