Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on lipkowski.org X-Spam-Level: X-Spam-Status: No, score=-2.3 required=5.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, HTML_MESSAGE,RCVD_IN_DNSWL_MED,SPF_PASS,T_DKIM_INVALID 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 v67B9JbN029805 for ; Fri, 7 Jul 2017 13:09:20 +0200 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1dTR4q-0002NJ-5w for rs_out_1@blacksheep.org; Fri, 07 Jul 2017 12:05:36 +0100 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1dTR4p-0002NA-56 for rsgb_lf_group@blacksheep.org; Fri, 07 Jul 2017 12:05:35 +0100 Received: from rgout0107.bt.lon5.cpcloud.co.uk ([65.20.0.127] helo=rgout01.bt.lon5.cpcloud.co.uk) by relay1.thorcom.net with esmtp (Exim 4.89) (envelope-from ) id 1dTR4l-0000ra-DZ for rsgb_lf_group@blacksheep.org; Fri, 07 Jul 2017 12:05:33 +0100 X-OWM-Source-IP: 86.186.115.165 (GB) X-OWM-Env-Sender: alan.melia@btinternet.com X-Junkmail-Premium-Raw: score=8/50,refid=2.7.2:2017.7.3.25715:17:8.707,ip=,rules=NO_URI_FOUND, NO_CTA_URI_FOUND, NO_MESSAGE_ID, NO_URI_HTTPS, TO_MALFORMED Received: from gnat (86.186.115.165) by rgout01.bt.lon5.cpcloud.co.uk (9.0.019.13-1) (authenticated as alan.melia@btinternet.com) id 58F62BE3084B8C58 for rsgb_lf_group@blacksheep.org; Fri, 7 Jul 2017 12:05:29 +0100 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=btinternet.com; s=btcpcloud; t=1499425531; bh=4WbFySQ8etkHAox9kTb33AjLDwc4DOLZ8tqXpzQ8d7Q=; h=Message-ID:From:To:References:Subject:Date:MIME-Version:X-Mailer; b=bbn1KT5NA7WPsnpxGfjTsLHGJ/RUaRYaiEQVp3iJXI27rk7IUcuyATtAdEjb1pF6WkrpFbzbykU4vgWlgIAsmEHGpLDfisCz/fkgHtKI/pjbHg5FHXtZDm3cQ8HSxVUKAvgtdjQYWG8Yzf6lZ10WRqfobDozp0meKDqcEH/Vfuw= Message-ID: From: "Alan Melia" To: References: <15d1c1535f5-4bc5-1c05d@webprd-a27.mail.aol.com> Date: Fri, 7 Jul 2017 12:05:23 +0100 MIME-Version: 1.0 X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2900.5931 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.6157 X-Scan-Signature: fe104f0109b1b9777bcb4182b547ef25 Subject: Re: LF: Simple coherent frequency generator Content-Type: multipart/alternative; boundary="----=_NextPart_000_0023_01D2F719.50452EC0" 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: O X-Status: X-Keywords: X-UID: 12192 This is a multi-part message in MIME format. ------=_NextPart_000_0023_01D2F719.50452EC0 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable Hi Riccardo, I will forward attachments but there is a size restriction = (I can't no remember what it is but probably about 3 to 500kB) This one = is an old text distributors, from the days of dial-up :-)) It will just dump oversize messages. Alan G3NYK =20 ----- Original Message -----=20 From: Riccardo Zoli=20 To: LF Group=20 Sent: Friday, July 07, 2017 11:44 AM Subject: Re: LF: Simple coherent frequency generator Hi Markus, LF Sorry but I have got some problems with the reflector (no forwarding = with attachements). Link to schematics: = https://www.dropbox.com/sh/65l7vehoy96yon8/AABYdfyf5HkpdMVbDEI-TXbYa?dl=3D= 0 Yes, Markus. In David's PA the modulator (two XOR ports, SCH2) it's = inserted between D Flip Flop and MOS drive. The phase changes are = audible on output transformer during TX (like tic-tic-tic...), but it = works very well. We haven't tested NEO-6 modules, but i think NEO-M8N/Q is the better = choice (in particular for the TCXO on board and improved GPS RX = sensitivity). All the best 73 de Riccardo IW4DXW Il 07/Lug/2017 10:09, "Markus Vester" ha = scritto: Thank you very much Ric for this most interesting hint. Unfortunately I couldn't find the two jpg images, they might have = been in an attachment that didn't make it through the reflector. Would = it be possible to upload them to a website and share the links? One note regarding excitation at double frequency: Make sure that = the XOR modulation is applied after the final divider, because otherwise = the phase difference would be halved (+-90 instead of +-180 degrees) and = also ambiguous. Best 73, Markus (DF6NM) -----Urspr=C3=BCngliche Mitteilung-----=20 Von: Riccardo Zoli An: LF Group Verschickt: Fr, 7. Jul 2017 9:50 Betreff: LF: Simple coherent frequency generator Hi Markus, Domenico, Stefan, LF many thanks for last EbNaut decodes, dr Markus. And thanks Domenico for your outstanding EbNaut automatic decoder! In these days we have got good results using stand-alone NEO-M8N (or NEO-7M as well) modules like reference frequency generator: (no more external TCXO, OCXO, PLL, etc....hi); obviously, the module with his patch antenna should be installed in a good position. The output signal isn't affected by a significant jitter (up to 1 MHz) and remains very stable in phase. -A VERY SIMPLE COHERENT FREQUENCY GENERATOR (SCH1.JPG)- We need only a buffer on TP5 (pin3 of the U-blox hybrid, connected normally to the status LED) to adapt levels and impedance toward amplifier. SCH1.JPG is a simple solution tested by Tony IK1HGI, with GPS and buffer installed outside the house. The square wave signal is = applied to PA using about 10 meters of RG174. The solution with RS-232(TTL 3.3V)->WiFi converter is a practical option (it works fine in my shack): you could use a normal COM (TTL 3.3V) to USB adapter. Use "U-center" (by U-blox - https://www.u-blox.com/en/product/u-center-windows) to pre-configure the module. After connecting it, it's necessary to set the navigation mode and minimum elevation of sats (thanks to Domenico for the advice). Go to... - Menu - View - Configuration view - Select item "NAV5 (Navigation 5)" (left side) - Set Dynamic Model to "Stationary" (right side) - Set Min SV Elevation to 10 degrees - Press Send button - Select item "TP5 (Timepulse 5)" (left side). - Select Frequency and Duty Cycle mode (right side) - Set Duty cycle values (50% normally) - Set QRG values Frequency and Frequency Locked; normal or x2 with G0MRF PA (http://www.g0mrf.com/630m.htm) or x4 with a generic SDR quadrature generator like 74HC74 (normally used with H-mode mixers) - Press Send button ...obviously we need GPS module status ALWAYS in locked mode to = obtain a valid coherent signal... - Select item "CFG (Configuration)" (left side) - Select "Save current configuration" (right side) - Select all Devices (in particular I2C-EEPROM) by keeping pressing = Shift key - Press Send button Now the module is programmed. -BPSK MODULATOR (SCH2.JPG)- Now we need a BPSK modulator to send EbNaut messages: the simplest method uses XOR (or XNOR) logic ports. This is a very cheap, but fine solution to be EbNaut QRV in TX. In particular, this modulator can be used succesfully on G0MRF class = D PA (http://www.g0mrf.com/630m.htm) and tested by Tony IK1HGI, but = also in any other amplifier. In this last case, it needs a proper signal buffer. All the best 73 de Riccardo IW4DXW ------=_NextPart_000_0023_01D2F719.50452EC0 Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable =EF=BB=BF
Hi Riccardo, I will forward attachments = but there=20 is a size restriction (I can't no remember what it is but probably about = 3 to=20 500kB) This one is an old text distributors,  from the days of = dial-up=20 :-))
It will just dump oversize = messages.
Alan
G3NYK  
----- Original Message -----
From:=20 Riccardo Zoli
Sent: Friday, July 07, 2017 = 11:44=20 AM
Subject: Re: LF: Simple = coherent=20 frequency generator

Hi Markus, LF

Sorry but I have got some problems with the reflector = (no=20 forwarding with attachements).

Link to schematics:

https://www.dropbox.com/sh/65l7vehoy96yon8/AABYdfyf5HkpdMVbDE= I-TXbYa?dl=3D0

Yes, Markus. In David's PA the modulator (two XOR = ports, SCH2)=20 it's inserted between D Flip Flop and MOS drive. The phase changes are = audible=20 on output transformer during TX (like tic-tic-tic...), but it works = very=20 well.

We haven't tested NEO-6 modules, but i think NEO-M8N/Q = is the=20 better choice (in particular for the TCXO on board and improved GPS RX = sensitivity).

All the best


73 de Riccardo IW4DXW



Il 07/Lug/2017 10:09, "Markus Vester" <markusvester@aol.com> ha = scritto: Thank=20 you very much Ric for this most interesting = hint.

Unfortunately I=20 couldn't find the two jpg images, they might have been in an = attachment=20 that didn't make it through the reflector. Would it be possible = to=20 upload them to a website and share the links?

One = note regarding=20 excitation at double frequency: Make sure that the XOR modulation is = applied=20 after the final divider, because otherwise the phase difference = would be=20 halved (+-90 instead of +-180 degrees) and also = ambiguous.

Best=20 73,
Markus (DF6NM)

-----Urspr=C3=BCngliche Mitteilung----- =
Von:=20 Riccardo Zoli <riccardozoli80@gmail.com>
An: LF Group = <rsgb_lf_group@blacksheep.org>
Verschickt: = Fr, 7. Jul=20 2017 9:50
Betreff: LF: Simple coherent frequency=20 generator

Hi Markus, Domenico, Stefan, LF

many = thanks=20 for last EbNaut decodes, dr Markus. And thanks Domenico
for your=20 outstanding EbNaut automatic decoder!
In these days we have got = good=20 results using stand-alone NEO-M8N (or
NEO-7M as well) modules = like=20 reference frequency generator: (no more
external TCXO, OCXO,=20 PLL,
etc....hi); obviously, the module with his patch antenna = should=20 be
installed in a good position. The output signal isn't affected = by=20 a
significant jitter (up to 1 MHz) and remains very stable in=20 phase.


-A VERY SIMPLE COHERENT FREQUENCY GENERATOR=20 (SCH1.JPG)-

We need only a buffer on TP5 (pin3 of the U-blox = hybrid,=20 connected
normally to the status LED) to adapt levels and = impedance=20 toward
amplifier.
SCH1.JPG is a simple solution tested by Tony = IK1HGI,=20 with GPS and
buffer installed outside the house. The square wave = signal=20 is applied
to PA using about 10 meters of RG174.
The solution = with=20 RS-232(TTL 3.3V)->WiFi converter is a practical
option (it = works fine=20 in my shack): you could use a normal COM (TTL
3.3V) to USB=20 adapter.
Use "U-center" (by U-blox -
https://www.u-blox.com/en/product/u-center-windows)=20 to pre-configure
the module.
After connecting it, it's = necessary to=20 set the navigation mode and
minimum elevation of sats (thanks to = Domenico=20 for the advice).

Go to...
- Menu - View
- Configuration = view

- Select item "NAV5 (Navigation 5)" (left side)
- Set = Dynamic=20 Model to "Stationary" (right side)
- Set Min SV Elevation to 10=20 degrees
- Press Send button

- Select item "TP5 (Timepulse = 5)"=20 (left side).
- Select Frequency and Duty Cycle mode (right = side)
- Set=20 Duty cycle values (50% normally)
- Set QRG values Frequency and = Frequency=20 Locked; normal or x2 with
G0MRF PA (http://www.g0mrf.com/630m.htm) or x4 with a = generic=20 SDR
quadrature generator like
74HC74 (normally used with = H-mode=20 mixers)
- Press Send button

...obviously we need GPS = module status=20 ALWAYS in locked mode to obtain
a valid coherent = signal...

-=20 Select item "CFG (Configuration)" (left side)
- Select "Save = current=20 configuration" (right side)
- Select all Devices (in particular=20 I2C-EEPROM) by keeping pressing Shift key
- Press Send = button

Now=20 the module is programmed.


-BPSK MODULATOR = (SCH2.JPG)-

Now=20 we need a BPSK modulator to send EbNaut messages: the = simplest
method=20 uses XOR (or XNOR) logic ports.
This is a very cheap, but fine = solution=20 to be EbNaut QRV in TX.
In particular, this modulator can be used = succesfully on G0MRF class D
PA (http://www.g0mrf.com/630m.htm) and tested = by Tony=20 IK1HGI, but also
in any other amplifier.
In this last case, it = needs a=20 proper signal buffer.


All the best


73 de = Riccardo=20 = IW4DXW

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