Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on lipkowski.org X-Spam-Level: X-Spam-Status: No, score=0.5 required=5.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, HTML_FONT_SIZE_LARGE,HTML_MESSAGE,HTML_OBFUSCATE_05_10,RCVD_IN_SORBS_SPAM, SPF_PASS,T_DKIM_INVALID,URIBL_BLOCKED autolearn=no autolearn_force=no version=3.4.0 X-Spam-DCC: : mailn 1480; 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 v787ImuD022080 for ; Tue, 8 Aug 2017 09:18:50 +0200 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1deydM-0000aW-7M for rs_out_1@blacksheep.org; Tue, 08 Aug 2017 08:08:56 +0100 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1deydL-0000aN-8w for rsgb_lf_group@blacksheep.org; Tue, 08 Aug 2017 08:08:55 +0100 Received: from nm10-vm5.bullet.mail.ir2.yahoo.com ([212.82.96.157]) by relay1.thorcom.net with esmtps (TLSv1.2:ECDHE-RSA-AES256-GCM-SHA384:256) (Exim 4.89) (envelope-from ) id 1deydF-0001ZE-Sh for rsgb_lf_group@blacksheep.org; Tue, 08 Aug 2017 08:08:54 +0100 X-DKIM-Result: Domain=sky.com Result=Signature OK DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=sky.com; s=s1024; t=1502176127; bh=pigzvMLIy12aVnVYJ1Dht8CxolnbwbNI8GDU80amLgw=; h=Subject:To:References:From:Date:In-Reply-To:From:Subject; b=DAFTBS+F+Go3ohpjTxHxtsRD4AK1ajfPhhOhyMda3mqy/LY/vHaphH2u778eQd/n4lnxyKV0RZUFUtdX0XAG+RC/bpIaUVLIkb5QN12J/7Brrliot/4HZ7h0f1PbNm4CykhXpIYyeBCvlIMf0d7ENa5Xihffem0jrAnrb2QCZy8= Received: from [212.82.98.126] by nm10.bullet.mail.ir2.yahoo.com with NNFMP; 08 Aug 2017 07:08:47 -0000 Received: from [46.228.39.81] by tm19.bullet.mail.ir2.yahoo.com with NNFMP; 08 Aug 2017 07:08:47 -0000 Received: from [127.0.0.1] by smtp118.mail.ir2.yahoo.com with NNFMP; 08 Aug 2017 07:08:47 -0000 X-Yahoo-Newman-Id: 32351.7117.bm@smtp118.mail.ir2.yahoo.com X-Yahoo-Newman-Property: ymail-3 X-YMail-OSG: Dk_Rnj4VM1lnoR6Wm6TKpvVId7.vdy2o_y3cJ.EiYBY_KHw dEGAWpG.tDuricQNIRXGbVkYu974NGhXGJKwkg5ivCrinbN2EQgVLIl4kIVF KV4fdkxYt.KyBZbsWbQhed2pdmwxVChzDz9zvgm9HuJOjfvkSKXd10bF1upD mnwriJEFfhlZdtrB2JcFzsHejm_LcEmUxux3U23qFzNrqS1OeT29iyS6YCOC JA37uW0KfFKgVyFqm5m_xsNZzk4leTsfG7CmUco80oMLdABqcJ8ZuMj.Rsna AxDrMPolOAFnLRLO9MxXeevuknOEpXXuQdK5UYW4KAmGT4A_Xvm2kektOojN FZzq.DMc3IM4IQLluQi_P3Q3fS2OMQ_97Qt2oxUJplxdEtHu8K4rDbtGlVoh 2hQBIQN_yBWAMdf9LViqE82_URyZoe7LJkH59Q_pLHf7SzFgTxn570uOzi6n J8TqxbURLSngFKCTNPBz8rak.dhxqK.9pF9s1oLJop6ElKEIw6g5EbPV_sYk YY5rXV4vJYEpTmw6M9D175vsGvScmsJuuEIdALMQ- X-Yahoo-SMTP: j_3SYsmswBC2aNV_OIrcnikG.xLMmVTqADJjU_0.aphs7U0_qeEUQejE0GGg 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> <59886FDE.20509@posteo.de> From: Terry G0EZY Message-ID: <983eafc2-82df-d307-07d8-0070762b99bb@sky.com> Date: Tue, 8 Aug 2017 08:08:46 +0100 User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:52.0) Gecko/20100101 Thunderbird/52.2.1 MIME-Version: 1.0 In-Reply-To: <59886FDE.20509@posteo.de> Content-Language: en-US X-Scan-Signature: 18b4e5849b2f048d3198a3cfa1457948 Subject: Re: LF: vlfrx tools question Content-Type: multipart/alternative; boundary="------------BE08D7FF169D7B3D8D0C5DD1" 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: 12345 This is a multi-part message in MIME format. --------------BE08D7FF169D7B3D8D0C5DD1 Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 8bit Hi Stefan thanks for the advice. I also found online those additional steps to stop and disable the gpsd socket and then to start manually. I found a lot of info for using the RaPi as an NTP server in David Taylor's satsignal.eu website. I'm assuming when installing ntp and gpsd, autostart commands were placed in a boot configuration file - I'm still looking for it.... I see from ntpq - p that you left the on-line ntp servers operational, in addition to your gps (I understood Paul's email to disable external ntp by removing these lines as part of the ntp.conf modification) My gps USB id =ACM0. Unfortunately, even with all this advice, still no sign of gps synchronisation....but this has helped confirm I have set-up the basic system correctly, so it must be a simple error..and I have plenty of time! In your photo of the complete assembly, it is interesting to see your modifications. I can see clearly the gps interface connected to the RaPi gpio pins extended through the Octo board. It looks as though you have made your own interface plug for the input of the Octo and using only Ch1, Ch2 with Ch3 as PPS?. What are the two vertical boards on the left? the smaller one looks like (but not exactly) the DC/DC inverter. Also a direct power connection to the RaPi, as you are not using the microUSB power connector. Have you added the modifications to give the RaPi a "soft" on/off switch (to protect the SDCard) and a reset button? Finally, I see you have a USB plug connected - is this for the wifi? I think you are using a RaPi2 without an onboard wifi..and I remember from your earlier posts that you are using 2.4 GHz WiFi to link from your remote forest listening post back to your main site in the University. This must be a LoS path? Even so, quite impressive to work with the interference from the mass of other Wifi in the city... It gives me the thought to run a RaPi system at my local radio club which is in a relatively radio-quiet site outside the City of Doncaster. But this is about 12km away and not LoS. It would be a good LF/VLF education for the members as their main interest is microwave and nanowaves (light transmissions)..... 73 Terry On 07/08/2017 14:49, DK7FC wrote: > 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* > *remoterefidst t when poll reachdelayoffsetjitter* > *==============================================================================* > **SHM(0).GPS.0 l47643770.000297.483 137.453* > *v20819.php-frie .STEP.16 u- 102400.0000.0000.000* > *ole.klickmich.o .STEP.16 u- 102400.0000.0000.000* > *ntp.fanlin.de.STEP.16 u- 102400.0000.0000.000* > *+ptbtime1.ptb.de .PTB.1 u1346433615.411356.851 150.343* > > > 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 --------------BE08D7FF169D7B3D8D0C5DD1 Content-Type: text/html; charset=utf-8 Content-Transfer-Encoding: 8bit

Hi Stefan thanks for the advice.

I also found online those additional steps to stop and disable the gpsd socket and then to start manually. I found a lot of info for using the RaPi as an NTP server in David Taylor's satsignal.eu website. I'm assuming when installing ntp and gpsd, autostart commands were placed in a boot configuration file - I'm still looking for it....

I see from ntpq - p that  you left the on-line ntp servers operational, in addition to your gps (I understood Paul's email to disable external ntp by removing these lines as part of the ntp.conf modification)

My gps USB id =ACM0.

Unfortunately, even with all this advice, still no sign of gps synchronisation....but this has helped confirm I have set-up the basic system correctly, so it must be a simple error..and I have plenty of time!

In your photo of the complete assembly, it is interesting to see your modifications. I can see clearly the gps interface connected to the RaPi gpio pins extended through the Octo board. It looks as though you have made your own interface plug for the input of the Octo and using only Ch1, Ch2 with Ch3 as PPS?.

What are the two vertical boards on the left? the smaller one looks like (but not exactly) the DC/DC inverter. Also a direct power connection to the RaPi, as you are not using the microUSB power connector.

Have you added the modifications to give the RaPi a "soft" on/off switch (to protect the SDCard) and a reset button?

Finally, I see you have a USB plug connected - is this for the wifi? I think you are using a RaPi2 without an onboard wifi..and I remember from your earlier posts that you are using 2.4 GHz WiFi to link from your remote forest listening post back to your main site in the University. This must be a LoS path? Even so, quite impressive to work with the interference from the mass of other Wifi in the city...   It gives me the thought to run a RaPi system at my local radio club which is in a relatively radio-quiet site outside the City of Doncaster. But this is about 12km away and not LoS. It would be a good LF/VLF education for the members as their main interest is microwave and nanowaves (light transmissions).....

73 Terry


On 07/08/2017 14:49, DK7FC wrote:
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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