Peter Bell bell.peter@... writes:
If it is, then you should see a pulse every 2 seconds, lined up with the
even seconds in GPS time. This might seem a rather strange signal to
provide, but it's what the IS-95 derived CDMA systems use to trigger the
start of another 100 block signalling
I ran into a wiki description of GPS using WGS84 a couple days ago. It
included a mention of ESEC and it was something like: Earth Static,
Earth Centric. I think I was following a link about the Z3801A.
It referred to the fact that lat-lon is referenced to a static grid on
the Earth and
On 8/2/12 6:24 PM, Doug Reed wrote:
I ran into a wiki description of GPS using WGS84 a couple days ago. It
included a mention of ESEC and it was something like: Earth Static,
Earth Centric. I think I was following a link about the Z3801A.
It referred to the fact that lat-lon is referenced to a
Doug,
I ran into a wiki description of GPS using WGS84 a couple days ago. It
included a mention of ESEC and it was something like: Earth Static,
Earth Centric. I think I was following a link about the Z3801A.
It referred to the fact that lat-lon is referenced to a static grid on
the Earth
What 'scope are you using (brand and model)? TLL is 5V, CMOS 4000 series
can be 15V but runs starting at 3V. Set the scope vertical (channel 1) at
1V/div (probe at 10:1), use NORMAL for the trigger and set the trigger (for
the channel 1) *slowly* from 0V to +200mV (assuming that the trigger isn't
Azelio Boriani azelio.boriani@... writes:
What 'scope are you using (brand and model)? TLL is 5V, CMOS 4000 series
can be 15V but runs starting at 3V. Set the scope vertical (channel 1) at
1V/div (probe at 10:1), use NORMAL for the trigger and set the trigger (for
the channel 1) *slowly*
Hal Murray hmurray@... writes:
We discussed this area a week or three ago.
You don't need a digital scope to determine if there is a pulse. A digital
scope may help to see the pulse and figure out what it looks like.
With an analog scope, you can either look at the blinking light that
Doug Reed n0nas@... writes:
I ran into a wiki description of GPS using WGS84 a couple days ago. It
included a mention of ESEC and it was something like: Earth Static,
Earth Centric. I think I was following a link about the Z3801A.
It referred to the fact that lat-lon is referenced to a
Here:
www.leap*second*.com/museum/*hp58503*a/097-58503-12-iss-1.pdf
you can find that there is the option 002 for the even second but they call
it PP2S...
Try to discover if your 58503 has this option 002.
On Fri, Aug 3, 2012 at 5:09 PM, Christoph Kopetzky dekag...@gmail.comwrote:
Hal Murray
OK, that's what I get for working from memory. :-)
I got the idea more or less right but it has nothing to do with the
abbreviation under discussion
Thanks for the correction.
73, Doug.
b...@lysator.liu.se wrote:
Doug,
I ran into a wiki description of GPS using WGS84 a couple days ago.
Azelio Boriani azelio.boriani@... writes:
Here:
www.leap*second*.com/museum/*hp58503*a/097-58503-12-iss-1.pdf
you can find that there is the option 002 for the even second but they call
it PP2S...
Try to discover if your 58503 has this option 002.
Azelio,
thanks for the link but I
Hello followers,
I can state that my measuring of the signal (30 mV, 65,2 kHz) was caused by
the serial line of the com port of the receiver... :-)
After looking for sources of the noisy signal I disconnected my first the
GPS antenna signal from the 58512A GPS amplifier. - Signal intact
Then I
On 08/03/2012 04:20 AM, John Miles wrote:
Cross correlation is one of life's few free lunches, but you do have to wait
for it to work. Magnus is correct in that you can get a 3 dB advantage in
noise reduction per sweep, but that only applies to the first sweep.
Agreed. Did not mean to say
Hi John,
On 08/03/2012 05:18 AM, John Miles wrote:
The benefit is that I can de-correlate the reference oscillator noise,
and measure near or even below it.
I have just started doing this, so this is really my first sloppy
measurements for you to see where I am heading.
I expect John to chime
dekag...@gmail.com said:
with my analog scope (Hameg HM2005-2) I can trigger a low level voltage
spike signal with a p-p voltage of 30 mV and a frequency of 52,6 kHz. Could
that be real? The signal level is very low, 30 mV...
That sounds like junk pickup. My guess would be from a switching
Hal Murray hmurray@... writes:
dekagoon@... said:
with my analog scope (Hameg HM2005-2) I can trigger a low level voltage
spike signal with a p-p voltage of 30 mV and a frequency of 52,6 kHz. Could
that be real? The signal level is very low, 30 mV...
That sounds like junk pickup.
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