Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on lipkowski.org X-Spam-Level: X-Spam-Status: No, score=0.0 required=5.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, HTML_FONT_SIZE_LARGE,HTML_MESSAGE,HTML_OBFUSCATE_05_10,SPF_PASS,URIBL_BLOCKED autolearn=ham autolearn_force=no version=3.4.0 X-Spam-DCC: EATSERVER: mailn 1166; Body=2 Fuz1=2 Fuz2=2 Received: from post.thorcom.com (post.thorcom.com [195.171.43.25]) by lipkowski.org (8.14.4/8.14.4/Debian-8+deb8u2) with ESMTP id v77E11LY016047 for ; Mon, 7 Aug 2017 16:01:04 +0200 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1deiPS-0007yT-CT for rs_out_1@blacksheep.org; Mon, 07 Aug 2017 14:49:30 +0100 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1deiPR-0007yK-48 for rsgb_lf_group@blacksheep.org; Mon, 07 Aug 2017 14:49:29 +0100 Received: from mout02.posteo.de ([185.67.36.66]) by relay1.thorcom.net with esmtps (TLSv1.2:ECDHE-RSA-AES256-GCM-SHA384:256) (Exim 4.89) (envelope-from ) id 1deiPM-0007QU-W3 for rsgb_lf_group@blacksheep.org; Mon, 07 Aug 2017 14:49:27 +0100 Received: from submission (posteo.de [89.146.220.130]) by mout02.posteo.de (Postfix) with ESMTPS id BFBB020BD9 for ; Mon, 7 Aug 2017 15:49:21 +0200 (CEST) Received: from customer (localhost [127.0.0.1]) by submission (posteo.de) with ESMTPSA id 3xQzR531NQzysT for ; Mon, 7 Aug 2017 15:49:19 +0200 (CEST) Message-ID: <59886FDE.20509@posteo.de> Date: Mon, 07 Aug 2017 15:49:18 +0200 From: DK7FC User-Agent: Mozilla/5.0 (Windows; U; Windows NT 6.1; de; rv:1.9.1.8) Gecko/20100227 Thunderbird/3.0.3 MIME-Version: 1.0 To: rsgb_lf_group@blacksheep.org References: <15db2643c6f-5f13-23c2@webprd-m101.mail.aol.com> <5986259C.8020409@posteo.de> <59864218.1030605@posteo.de> <75b1b001-f17e-35b0-bcb4-6535fe67fc38@sky.com> In-Reply-To: <75b1b001-f17e-35b0-bcb4-6535fe67fc38@sky.com> X-Scan-Signature: c7180015d1271a4d0a6e92915e71cab1 Subject: Re: LF: vlfrx tools question Content-Type: multipart/alternative; boundary="------------090703070803090306030501" X-SA-Exim-Scanned: Yes Sender: owner-rsgb_lf_group@blacksheep.org Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rs_out_1@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false X-Scanned-By: MIMEDefang 2.75 Status: RO X-Status: X-Keywords: X-UID: 12344 This is a multi-part message in MIME format. --------------090703070803090306030501 Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit Hi Terry, Am 06.08.2017 13:07, schrieb Terry G0EZY: > Hi Stefan > > Did you get gpsd and ntp working by following Paul's info (email 21/07)? No, but his advice was an important step forward. I took additional advice from the web and after some time i got it working. > I have a UBlox NEO 7M connected to the RasPi by USB and I can run xgps > or cgps and see that the NMEA is being read. But ntp is not being > updated by the gps... I'm using a NEO 6M and i used the serial interface on the GPIO board. You just need two short wires to realise the communication. Like that: http://www.iup.uni-heidelberg.de/schaefer_vlf/VLF/20170807_152938.jpg I have been at the point where you are hanging now. The main steps i did to get it running were: */sudo systemctl stop gpsd.socket /* */sudo systemctl disable gpsd.socket/* then start the service manually with: */sudo gpsd –n -F /var/run/gpsd.sock /dev/ttyAMA0/* Replace AMA0 by your individual ID of the USB serial interface if you want to use that. I added: */server 127.127.28.0 prefer/* */fudge 127.127.28.0 time1 0.055 refid GPS/* to* * /*/etc/ntp.conf* /Afterwards /*sudo service ntp restart* /is required. I checked if it works by running */ntpq –p /*and got this result: *pi3@Pi8:~/script $ ntpq -p* * remote refid st t when poll reach delay offset jitter* *==============================================================================* **SHM(0) .GPS. 0 l 47 64 377 0.000 297.483 137.453* * v20819.php-frie .STEP. 16 u - 1024 0 0.000 0.000 0.000* * ole.klickmich.o .STEP. 16 u - 1024 0 0.000 0.000 0.000* * ntp.fanlin.de .STEP. 16 u - 1024 0 0.000 0.000 0.000* *+ptbtime1.ptb.de .PTB. 1 u 134 64 336 15.411 356.851 150.343* For my portable recorder i'm running a script that checks the difference between system time and GPS time. It is running a while loop until the time difference becomes less than 2 seconds. This tells that the clock has been set by GPS. Then the script continues to start all the vt processes. Soon i'm going to run an EbNaut transmission on 3675 Hz to see if i can decode it only by using vlfrx tools and EbNaut. > Once I have that problem solved and built the PPS shaper, I can make > progress with the Octo soundcard project. > > Paul made it seem so easy...! Yes, if you know how it works then it appears to be easy. Like driving a car, or solving mathematic equations... > I followed your recommendation and bought some of the DC/DC converters > from Amazon. Do they require any additional filtering? No additional filtering is required (i can't know about your individual situation however). Anyway i put 1000 uF onto the output, just to be prepared for any eventualities. After years i did not discover QRM on LF/MF/VLF. I'm using this converter on the tree as well. 73, Stefan > > 73 Terry --------------090703070803090306030501 Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding: 8bit Hi Terry,

Am 06.08.2017 13:07, schrieb Terry G0EZY:
Hi Stefan

Did you get gpsd and ntp working by following Paul's info (email 21/07)?
No, but his advice was an important step forward. I took additional advice from the web and after some time i got it working.

I have a UBlox NEO 7M connected to the RasPi by USB and I can run xgps or cgps and see that the NMEA is being read. But ntp is not being updated by the gps...
I'm using a NEO 6M and i used the serial interface on the GPIO board. You just need two short wires to realise the communication.
Like that: http://www.iup.uni-heidelberg.de/schaefer_vlf/VLF/20170807_152938.jpg

I have been at the point where you are hanging now. The main steps i did to get it running were:
sudo systemctl stop gpsd.socket
 sudo systemctl disable gpsd.socket
then start the service manually with:
sudo gpsd –n -F /var/run/gpsd.sock /dev/ttyAMA0
Replace AMA0 by your individual ID of the USB serial interface if you want to use that.
I added:
 
server 127.127.28.0 prefer
fudge 127.127.28.0 time1 0.055 refid GPS
to /etc/ntp.conf
Afterwards sudo service ntp restart is required.
I checked if it works by running ntpq –p and got this result:

 
pi3@Pi8:~/script $ ntpq -p
     remote           refid      st t when poll reach   delay   offset  jitter
==============================================================================
*SHM(0)          .GPS.            0 l   47   64  377    0.000  297.483 137.453
 v20819.php-frie .STEP.          16 u    - 1024    0    0.000    0.000   0.000
 ole.klickmich.o .STEP.          16 u    - 1024    0    0.000    0.000   0.000
 ntp.fanlin.de   .STEP.          16 u    - 1024    0    0.000    0.000   0.000
+ptbtime1.ptb.de .PTB.            1 u  134   64  336   15.411  356.851 150.343


For my portable recorder i'm running a script that checks the difference between system time and GPS time. It is running a while loop until the time difference becomes less than 2 seconds. This tells that the clock has been set by GPS. Then the script continues to start all the vt processes.
Soon i'm going to run an EbNaut transmission on 3675 Hz to see if i can decode it only by using vlfrx tools and EbNaut.

Once I have that problem solved and built the PPS shaper, I can make progress with the Octo soundcard project.

Paul made it seem so easy...!
Yes, if you know how it works then it appears to be easy. Like driving a car, or solving mathematic equations...

I followed your recommendation and bought some of the DC/DC converters from Amazon. Do they require any additional filtering?
No additional filtering is required (i can't know about your individual situation however). Anyway i put 1000 uF onto the output, just to be prepared for any eventualities.
After years i did not discover QRM on LF/MF/VLF. I'm using this converter on the tree as well.

73, Stefan

73 Terry
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