oldmath...@gmail.com said:
has anyone suggested a 50R in series with a capacitor as termination? no
DC currents
I've seen that suggestion before. I don't remember where. It was a long
time ago.
In order to work, the R-C time constant has to be long relative to the
rise/fall time of the
Jason
Welcome to the list. I had the pleasure of observing my first 10 GHz
QSO a few weeks ago, and was surprised at how difficult it was to find
the other guy ... he was 20 kHz lower than we expected. Accurate LO's on
both sides would have been a big help.
GL de KM1P Joe
On 9/15/2014
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Trying to help a friend with a ublox using an external antenna. Does any
one know what the voltage range on this antenna is. Trimble P/N 28367-00
Thank you
Bert Kehren
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mag...@rubidium.dyndns.org said:
[snip long discussion of PID/PLL]
Make sure you have a damping factor of at least 3.
Is that a general rule for PIDs or something specific to PLLs/GPSDOs?
Where did the value 3 come from?
--
These are my opinions. I hate spam.
Hello,
I got a Trimble Thunderbolt a few months ago and implemented
a simple monitor on a MCU to display time, no of satellites
etc. on a lcd display.
While working on this, I found the hint for the upcoming
rollover in 2017 in the user manual. I couldn?t find any
details on this in the
Hi guys,
I told you ! Some questions were to arise... ;-)
At work I'm working on 1.5, 3 and 12 GHz pulsed systems with pulses length
between 0.1 and 5 us. We are especially interested in phase stability pulse
to pulse (repetition rate) and possibly with minor priority on the length of
Hi Matthias,
Thanks much for sharing this information. You are fortunate to have access to a
GNSS simulator.
May I assume from your comments that the TBolt itself was fine -- it continued
to track SV and the 1PPS and 10 MHz outputs were not affected? This is the
expected behavior of GPS
Version 4 of Lady Heather(not yet released) has rollover compensation built in.
If the detected date is less than the current system date it adds 1024 weeks
to the Tbolt date/time by default. You can also specify an alternate rollover
offset or disable rollover compensation.
saidj...@aol.com said:
here are some plots from two GPSDOs, one series terminated (CSAC GPSDO),
and one load-terminated (Agilent 58503A) product.
Nice pictures. Thanks.
My reading of your pictures is that the 58503A has a weak driver. Do you
have a TBolt?
... and there is a little hump
matthias.je...@gmx.de said:
So I took the unit to work and hooked it to a signal generator capable of
simulating GPS, GNSS etc...
Neat. Thanks, both for running the experiment and for sharing the results.
Thunderbolt will be usable after July, 2017 - I?d be happy to live with a
wrong
For geo use but something a time nut would like - lots of good pictures of
antennas
http://www.ngs.noaa.gov/ANTCAL/main.jsp
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All,
I'm doing a simple PCB design for a breakout for the venerable FE-5680a, and
I'm curious if there's any need/desire to separate out the GND/DGND (pins 2 and
5). In my test connection, I just used pin 2 for grounding the 15V supply, and
pin 5 for everything else, but I figured they're
Hi Tom,
I didn´t save the output, but the generator is located on my
workbench, so it´s no problem to repeat this experiment at
any time.
But I´m afraid it´s a bit more complicated. I need to
specify a almanac file on the simulator. Stored was a file
from 2012 which was shown to be valid
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