[TangerineSDR] TangerineSDR Digest, Vol 6, Issue 25

Nathaniel A. Frissell Ph.D. nathaniel.frissell at scranton.edu
Mon Sep 23 13:12:13 EDT 2019


Enjoy your travels, Ward!

73 de Nathaniel W2NAF

From: TangerineSDR <tangerinesdr-bounces at lists.tapr.org> on behalf of TangerineSDR Listserv <tangerinesdr at lists.tapr.org>
Reply-To: TangerineSDR Listserv <tangerinesdr at lists.tapr.org>
Date: Monday, September 23, 2019 at 12:00 PM
To: TangerineSDR Listserv <tangerinesdr at lists.tapr.org>
Cc: Ward Silver <hwardsil at gmail.com>
Subject: Re: [TangerineSDR] TangerineSDR Digest, Vol 6, Issue 25

I am on the road in New Mexico and will miss tonight and next week's conference.  I hope to jump back in on the magnetometer discussion when we get back in early October.

73, Ward N0AX

On Mon, Sep 23, 2019 at 7:57 AM <tangerinesdr-request at lists.tapr.org<mailto:tangerinesdr-request at lists.tapr.org>> wrote:
Send TangerineSDR mailing list submissions to
        tangerinesdr at lists.tapr.org<mailto:tangerinesdr at lists.tapr.org>

To subscribe or unsubscribe via the World Wide Web, visit
        http://lists.tapr.org/mailman/listinfo/tangerinesdr_lists.tapr.org
or, via email, send a message with subject or body 'help' to
        tangerinesdr-request at lists.tapr.org<mailto:tangerinesdr-request at lists.tapr.org>

You can reach the person managing the list at
        tangerinesdr-owner at lists.tapr.org<mailto:tangerinesdr-owner at lists.tapr.org>

When replying, please edit your Subject line so it is more specific
than "Re: Contents of TangerineSDR digest..."


Today's Topics:

   1. Re: TangerineSDR Board Sizes and Mock-up (John Ackermann.  N8UR)
   2. Teamspeak Tonight (Nathaniel A. Frissell Ph.D.)
   3. Re: Teamspeak Tonight (Phil Erickson)


----------------------------------------------------------------------

Message: 1
Date: Sun, 22 Sep 2019 12:16:39 -0400
From: "John Ackermann.  N8UR" <jra at febo.com<mailto:jra at febo.com>>
To: Rick - W2GPS <w2gps at cnssys.com<mailto:w2gps at cnssys.com>>
Cc: "Nathaniel A. Frissell Ph.D. via TangerineSDR"
        <tangerinesdr at lists.tapr.org<mailto:tangerinesdr at lists.tapr.org>>
Subject: Re: [TangerineSDR] TangerineSDR Board Sizes and Mock-up
Message-ID: <061b13f1-e6e1-49ad-86a5-7aac4ca29786 at febo.com<mailto:061b13f1-e6e1-49ad-86a5-7aac4ca29786 at febo.com>>
Content-Type: text/plain; charset="utf-8"

There may be multiple ways to get there and? I have a lot of experiments to do before I'l know if this ideawill work with the uBlox modules.? The complication is that none of the modules accept an external clock input so creativity will be required.? Sometime in the next few days I'll put together an initial description of the options.

On Sep 22, 2019, 11:46 AM, at 11:46 AM, Rick - W2GPS <w2gps at cnssys.com<mailto:w2gps at cnssys.com>> wrote:
>John,
>
>I think we can make this work without "magic" by picking the right
>OCXO, carefully adjusting the setup parameters in the M8F and possibly
>adding a processor in series with the D/A to do additional filtering.
>Nevertheless, your "magic" is interesting, too.
>
>Rick
>W2GPS
>
>
>-----Original Message-----
>From: John Ackermann N8UR <jra at febo.com<mailto:jra at febo.com>>
>Sent: September 21, 2019 5:36 PM
>To: Rick - W2GPS <w2gps at cnssys.com<mailto:w2gps at cnssys.com>>; 'TAPR TangerineSDR Modular
>Software Defined Radio' <tangerinesdr at lists.tapr.org<mailto:tangerinesdr at lists.tapr.org>>
>Subject: Re: [TangerineSDR] TangerineSDR Board Sizes and Mock-up
>
>The "magic" I'm working on is whether we can use real time corrections
>via internet or another mechanism to reduce the GPS noise.  It appears
>we may be able to reduce the ADEV by an order of magnitude.  If we do
>that, the loop time constant can be shorter which would allow for a
>cheaper oscillator.  But there's still a bunch of testing to do to
>confirm that and figure out a final design.
>
>On 9/21/19 5:00 PM, Rick - W2GPS wrote:
>> John,
>>
>> I noticed the various layout examples in the SiLabs 53xx
>documentation
>> but I did not notice the 6-layer requirement. At present, the board
>> stack is 4-layer, 80mm (0.31") thick to match the M.2 specification.
>
>> It is set up to match the stack-up requirements for standard
>> configuration from low cost board houses like 4pcb.com<http://4pcb.com>. I just
>checked
>> and it will be easy to change this to 6-layer, 80mm (0.31") thick
>> board while staying within their low cost board structure.
>>
>> I will need to find a low cost TCXO for the base configuration. The
>> OCXO I show is well over $100 in 50-piece quantity. It can get to
>> twice that if over specified.  I hope the footprints can be overlaid
>to save room.
>>
>> The board size will be a challenge, I'm sure.
>>
>> Rick
>> W2GPS
>>
>>
>> -----Original Message-----
>> From: TangerineSDR <tangerinesdr-bounces at lists.tapr.org<mailto:tangerinesdr-bounces at lists.tapr.org>> On Behalf Of
>
>> John Ackermann N8UR via TangerineSDR
>> Sent: September 21, 2019 4:43 PM
>> To: tangerinesdr at lists.tapr.org<mailto:tangerinesdr at lists.tapr.org>
>> Cc: John Ackermann N8UR <jra at febo.com<mailto:jra at febo.com>>
>> Subject: Re: [TangerineSDR] TangerineSDR Board Sizes and Mock-up
>>
>> Thanks, Rick.  I've finally started paying attention and have been
>> thinking about some unique GPSDO ideas.  They may change the physical
>
>> parts a bit but we're a long way from having anything finalized.
>>
>> I think we've concluded that the RF output from the M8F module is not
>
>> acceptable for RF use -- it has a very ugly dither pattern so we will
>
>> likely need a external (TC)(OC)XO and DAC no matter what architecture
>
>> we end up with.
>>
>> One thing to note: the SiLabs 53xx chip wants a 6 layer board and
>also
>> has some fairly funky layout requirements; a bunch of this is due to
>> crosstalk reduction, and the 48 MHz crystal used as the cleanup
>> oscillator.  The chip is physically small, but pretty complex to lay
>out.
>>
>> 73,
>> John
>>
>> On 9/21/19 4:24 PM, Rick - W2GPS via TangerineSDR wrote:
>>> All,
>>>
>>> I have been working on the clock module to see if the proposed size
>>> for
>> the clock module is reasonable. Attached is a 3D top view showing
>> major components. Not shown is the D/A to drive the OCXO and various
>> minor components. These may wind up on the bottom of the board.
>>>
>>> Rick
>>> W2GPS
>>>
>>> -----Original Message-----
>>> From: TangerineSDR <tangerinesdr-bounces at lists.tapr.org<mailto:tangerinesdr-bounces at lists.tapr.org>> On Behalf
>Of
>>> Scotty Cowling via TangerineSDR
>>> Sent: September 17, 2019 11:50 AM
>>> To: TAPR TangerineSDR Modular Software Defined Radio
>>> <tangerinesdr at lists.tapr.org<mailto:tangerinesdr at lists.tapr.org>>
>>> Cc: Scotty Cowling <scotty at tonks.com<mailto:scotty at tonks.com>>
>>> Subject: [TangerineSDR] TangerineSDR Board Sizes and Mock-up
>>>
>>> Here is a sneak preview of part of the TangerineSDR talk I will be
>>> giving
>> at DCC on Saturday.
>>>
>>> Rick, this should be enough information on the PCB sizes to figure
>>> out if
>> we have enough room or not.
>>>
>>> The CKM can be extended downward and/or to the right (when looking
>at
>>> the
>> assembly with the RPi I/O connector on top). We may have to make the
>> DE board larger anyway, if our CAD guy needs more routing room.
>>>
>>> 73,
>>> Scotty WA2DFI
>>>
>>>
>>
>>
>> --
>> TangerineSDR mailing list
>> TangerineSDR at lists.tapr.org<mailto:TangerineSDR at lists.tapr.org>
>> http://lists.tapr.org/mailman/listinfo/tangerinesdr_lists.tapr.org
>>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.tapr.org/pipermail/tangerinesdr_lists.tapr.org/attachments/20190922/f247cc78/attachment-0001.html>

------------------------------

Message: 2
Date: Mon, 23 Sep 2019 12:18:00 +0000
From: "Nathaniel A. Frissell Ph.D." <nathaniel.frissell at scranton.edu<mailto:nathaniel.frissell at scranton.edu>>
To: TAPR TangerineSDR Modular Software Defined Radio
        <tangerinesdr at lists.tapr.org<mailto:tangerinesdr at lists.tapr.org>>
Subject: [TangerineSDR] Teamspeak Tonight
Message-ID:
        <BN8PR03MB472142E741110EBF5D3C33BAF2850 at BN8PR03MB4721.namprd03.prod.outlook.com<mailto:BN8PR03MB472142E741110EBF5D3C33BAF2850 at BN8PR03MB4721.namprd03.prod.outlook.com>>

Content-Type: text/plain; charset="us-ascii"

Hi all,

It was nice seeing everyone at TAPR this weekend. I really enjoyed it, and I thought it was very productive.

I'm not going to be on the Teamspeak tonight. I need to catch up on school work and spend some time with my family. I plan on being back next week.

Enjoy your day and 73,
Nathaniel W2NAF
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.tapr.org/pipermail/tangerinesdr_lists.tapr.org/attachments/20190923/04e154a2/attachment-0001.html>

------------------------------

Message: 3
Date: Mon, 23 Sep 2019 08:56:58 -0400
From: Phil Erickson <phil.erickson at gmail.com<mailto:phil.erickson at gmail.com>>
To: TAPR TangerineSDR Modular Software Defined Radio
        <tangerinesdr at lists.tapr.org<mailto:tangerinesdr at lists.tapr.org>>
Subject: Re: [TangerineSDR] Teamspeak Tonight
Message-ID:
        <CAAZaqEtYr6ypGwNLHZQu5DqSG5TNOqLTNDDj2CSxFyYN1=JX4Q at mail.gmail.com<mailto:JX4Q at mail.gmail.com>>
Content-Type: text/plain; charset="utf-8"

Hi all,

I was scheduled to show up and I will do my best to make it.

Cheers
Phil

On Mon, Sep 23, 2019 at 08:18 Nathaniel A. Frissell Ph.D. via TangerineSDR <
tangerinesdr at lists.tapr.org<mailto:tangerinesdr at lists.tapr.org>> wrote:

> Hi all,
>
>
>
> It was nice seeing everyone at TAPR this weekend. I really enjoyed it, and
> I thought it was very productive.
>
>
>
> I?m not going to be on the Teamspeak tonight. I need to catch up on school
> work and spend some time with my family. I plan on being back next week.
>
>
>
> Enjoy your day and 73,
>
> Nathaniel W2NAF
>
> --
> TangerineSDR mailing list
> TangerineSDR at lists.tapr.org<mailto:TangerineSDR at lists.tapr.org>
> http://lists.tapr.org/mailman/listinfo/tangerinesdr_lists.tapr.org
>
--
----
Phil Erickson
phil.erickson at gmail.com<mailto:phil.erickson at gmail.com>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.tapr.org/pipermail/tangerinesdr_lists.tapr.org/attachments/20190923/15bde651/attachment.html>

------------------------------

Subject: Digest Footer

TangerineSDR mailing list
TangerineSDR at lists.tapr.org<mailto:TangerineSDR at lists.tapr.org>
http://lists.tapr.org/mailman/listinfo/tangerinesdr_lists.tapr.org


------------------------------

End of TangerineSDR Digest, Vol 6, Issue 25
*******************************************
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.tapr.org/pipermail/tangerinesdr_lists.tapr.org/attachments/20190923/86455c56/attachment-0001.html>


More information about the TangerineSDR mailing list