On Sat, May 5, 2018 at 12:08 AM, Mark Sims wrote:
> You could add doppler to the RINEX file. All the receivers with raw
> messages seem to output that.
I think the Doppler measurements can be omitted for static
positioning. CSRS-PPP results for a submission with/without Doppler
are identical.
>
> Does the Z12 have an internal memory backup battery?
Yes, there are two lithium thionyl chloride cells, Tadiran TL-5104. They
are 3.6 V primary cells, cylinders roughly AA in size, with spot-welded
axial leads. That part is obsolete, but Digikey has an equivalent,
TL-5903/P, which worked fi
Hi
What you describe sure sounds like a ram battery died sort of thing. I’ve never
noticed one in the boards I’ve
torn apart. I’d also admit that was a few years back ….
Bob
> On May 6, 2018, at 6:12 PM, Mark Sims wrote:
>
> I just added support for the Z12 to Lady Heather and fired up my Z12
I just added support for the Z12 to Lady Heather and fired up my Z12 for the
first time in a few years. It powers up in some kind of a weird loopback mode
and you have to reset the receiver memory to get it working.
Does the Z12 have an internal memory backup battery? Mine is currently do
On 5/6/2018 6:39 AM, Charles Steinmetz wrote:
So, yes, a sound card designed for signals up to ~22kHz should handle
SAQ at ~17kHz, but sound cards that can digitize signals above 22kHz are
rare. Some "professional" sound cards handle signal frequencies up to
~40kHz, but very, very few handle sig
Long ago I did some WWVB signal-to-noise measurements with an HP 3586C
selective voltmeter (commonly used by the FMT-nuts). I measured the signal
power at 60.0 kHz with 20 Hz bandwidth. Then I measured the power a small
offset plus and minus (100 Hz? I don't recall), and took the mean of the
Hi
First off, I don’t think there *is* an ideal antenna that “just works”. Maybe a
proper set of EMAG
probes that come with calibration sheets come close. For a home built this or
that …. there are
a lot of variables.
First up is very much part of receiving WWVB in the first place. Coax to an
Hi Hal:
You might want to check the orientation and location of the antenna before
digging into more technical areas.
It's been my experience there's a lot of AC mains conducted noise at 60 kHz.
http://www.prc68.com/I/LF-Ant.shtml#Noise
http://www.prc68.com/I/Spec_0002.shtml - 0 to 200 kHz spect
Hi Charles,
On 05/06/2018 06:08 PM, Charles Steinmetz wrote:
> Magnus wrote:
>
>> If you use it without care and knowledge, beware. That goes for any
>> tool we apply
>
> Indeed! The Cardinal Rule of design! (So often unfollowed)
>
> "An engineer is someone who can figure out what questio
Hal wrote:
I assume the problem is noise. Is there any simple way to measure the noise
around 60 KHz? How about not so simple?
Extra credit for a way that others nuts can reproduce so we can compare the
noise at my location with other locations.
For any location near a city, the noise level
Magnus wrote:
If you use it without care and knowledge, beware. That goes for any tool we
apply
Indeed! The Cardinal Rule of design! (So often unfollowed)
"An engineer is someone who can figure out what questions need to be
asked, figure out how to answer them, and tell when they are
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Hi,
On 05/06/2018 01:02 PM, Charles Steinmetz wrote:
> Alexander wrote:
>
>> but as I wrote a while ego ADI has a bit different chip which is free of
>> dead zone and much faster
>
> Hell, there are literally hundreds of PLL chips, lots of them better at
> various things than the 4046. I did no
Alexander wrote:
but as I wrote a while ego ADI has a bit different chip which is free of
dead zone and much faster
Hell, there are literally hundreds of PLL chips, lots of them better at
various things than the 4046. I did not suggest that the 4046/7046/9046
is the best PLL for any particu
but as I wrote a while ego ADI has a bit different chip which is free of
dead zone and much faster, I used it for low phase-noise clock generator
for 3,1Gb/s fiber optic systems of C-Cor/Comlux in the end of the past
century, now I am on vacation and do not have my engineering note books
with m
See below for further information on working with the 4046/7046/9046 PLL
families, including must-have design tools for anyone designing with
these devices.
I wrote:
The "flaw" in the 4046 is a dead zone around zero error in Phase
Comparator 2 (the PC one generally uses).
Magnus responded:
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