[time-nuts] Lecia L1 GPS chokering antenna voltage,

[bg]

Good!

"N"  is supposed to go to north, yes! But for this antenna it does not matter... longer story below. 

This is used when you do phase differential stuff. Which usually means L1/L2 stuff and specifically antenna calibration data for az/el.

I cannot find any calibration data. 

http://www.ngs.noaa.gov/ANTCAL/Antennas.jsp?manu=AeroAntenna

http://www.geopp.de/index.php?bereich=5&kategorie=34&artikel=62

However if you look at the AT antennas at NOAA with a spike radome - I think the base chokering is the same as ours. Just a different antenna element in say the AT2775-43. For that antenna it matters!

I think the application for the AT575-90 was code differential dgps (marine DGPS) base stations. This service gives the users 1m:ish accuracy. Phase calibration is clearly <<10cm and not needed for basic code DGPS.

--
   Björn



-------- Originalmeddelande --------
Från: "Mark C. Stephens" <marks at non-stop.com.au> 
Datum: 2013-07-15  12:13  (GMT+01:00) 
Till: Discussion of precise time and frequency measurement <time-nuts at febo.com> 
Rubrik: Re: [time-nuts] Lecia L1 GPS chokering antenna voltage, 
 
Thank you, It is a AT575-90_G!

Now, On the bottom, there is an arrow labelled N.
I presume that is supposed to face north?

I can't tell you how ideal this antenna is for my application, outstanding!


Thank you again.
-marki

-----Original Message-----
From: time-nuts-bounces at febo.com [mailto:time-nuts-bounces at febo.com] On Behalf Of bg at lysator.liu.se
Sent: Monday, 15 July 2013 7:02 PM
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] Lecia L1 GPS chokering antenna voltage,

Hi,

Is the antenna identical to this?

     http://www.aeroantenna.com/PDF/AT575-90_G.pdf

     http://ebookbrowse.com/at575-90-g-pdf-d359926216   (alternate link)

Do you have some pictures of the antenna? In particular the antenna element?

Aeroantennas of this vintage is usually "RG" which according to the spec above 5-18VDC. I recall having seen 4.5V as lower level to.

Modern antennas are usually good to 3.3 or lower. With vintage antennas this is much more uncertain.

--

     Björn

> I have been trying to find a datasheet for my Leica Antenna.
>
> All that is marked on the antenna is part number 10147.
>
> I want to find out what voltage range the preamp works off.
>
> Anybody have any idea?
>
>
> -marki
>
> _______________________________________________
> time-nuts mailing list -- time-nuts at febo.com To unsubscribe, go to 
> https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
> and follow the instructions there.
>

_______________________________________________
time-nuts mailing list -- time-nuts at febo.com
To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
and follow the instructions there.


_______________________________________________
time-nuts mailing list -- time-nuts at febo.com
To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
and follow the instructions there.