i'm newer here.
i have some questions about loran-c receiver.can you help me?
i want to know how can i find third zero crossing in loran-c receiver?
i find third zero cross by peterson 's method from this paper:
Analysis of Noise and Cycle Selection in a Loran Receiver
but due to Gausian noise,when i find third zero cross,it is not correct and
it is before or after correct third zero cross.i want to know how can i
track and correct third zero cross?(in other words what is acquisition in
loran-c receivers and how can i do?)
have you any matlab code or papers or thesis for this problems?
pleassssssssssssse help me?
:(
thanks a lot

Hi,

I don't know this model from Austron, but you could try asking fellow Time
Nuts if anyone has a manual for the 5000 which should include the full
calibration procedure.

I know on the Austron 2000C the calibration procedure was quite a long to
set it up correctly. I'm sure that the 5000 will be similar.

Rob

-----Original Message-----
From: time-nuts-bounces@febo.com [mailto:time-nuts-bounces@febo.com] On
Behalf Of mehdi
Sent: 13 April 2013 13:08
To: time-nuts@febo.com
Subject: Re: [time-nuts] Questions about Austron 5000 Loran C receiver

i'm newer here.
i have some questions about loran-c receiver.can you help me?
i want to know how can i find third zero crossing in loran-c receiver?
i find third zero cross by peterson 's method from this paper:
Analysis of Noise and Cycle Selection in a Loran Receiver but due to Gausian
noise,when i find third zero cross,it is not correct and it is before or
after correct third zero cross.i want to know how can i track and correct
third zero cross?(in other words what is acquisition in loran-c receivers
and how can i do?) have you any matlab code or papers or thesis for this
problems?
pleassssssssssssse help me?
:(
thanks a lot

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.

Hi

The concept you most commonly see is a curve fit approach. You know the structure of the waveform through several cycles. You can fit this "model waveform" to the observed data over a large number of points. As you fit more points, the impact of the noise is reduced.

Bob

On Apr 13, 2013, at 8:07 AM, mehdi electrostudent@gmail.com wrote:

Its a master timing rcvr from the simple research I have done. Must be
fallout from the US LORAN C shut down. Anyhow The whole signal spec is here.
http://www.navcen.uscg.gov/?pageName=loranSignalSpec
Its a 8 MB zip
I have done the 2000 procedure and it is complicated to say the least.
Given the vintage of the 5000 it might be the same. But that was quite a
while ago.
Are you in the US?
Regards
Paul

On Sat, Apr 13, 2013 at 9:21 AM, Rob Kimberley
robkimberley@btinternet.comwrote:

An additional thought.
The third cycle is not the thing you would see on a scope looking at the
raw signal. The rcvr determines when the signal has risen above 0. That may
be 1 to 2 really small cycles. Its from that point its the 3rd crossing.
Normally there is a gate out signal thats useful to trigger the scope with.
Regards
Paul

On Sat, Apr 13, 2013 at 10:55 AM, paul swed paulswedb@gmail.com wrote:

See if this helps:
http://www.leapsecond.com/museum/au2100f/scope.htm

/tvb (iPhone4)