[TangerineSDR] Notes from PSWS / TangerineSDR call of 09-07-2019

[Scotty Cowling]

Hi Rick,

I will send out some pictures for you.

Keep in mind that the connector placements, board sizes and even the 
pin-outs are preliminary. We need to build the first units as a set, and 
things might need to be tweaked to accommodate routing or parts placement.

My model is just the first stab at a system mechanical build.

73,
Scotty WA2DFI

On 2019-09-10 12:56, Rick - W2GPS via TangerineSDR wrote:
>
> Scotty,
>
> Can you send a photo of what you are building? I will not be at DCC 
> but I might be at the AMSAT meeting.
>
> Rick
>
> W2GPS
>
> *From:*Tom McDermott <tom.n5eg at gmail.com>
> *Sent:* September 10, 2019 2:51 PM
> *To:* Rick - W2GPS <w2gps at cnssys.com>
> *Subject:* Re: [TangerineSDR] Notes from PSWS / TangerineSDR call of 
> 09-07-2019
>
> HI Rick - the connector is M.2 M-keyed (listed in the ICD, V0.3). The 
> clock module
>
> has the gold-plated fingers, whilst the DE contains the M.2 connector 
> housing.
>
> The DE has not yet called out the connector part number but the gold 
> fingers on the
>
> clock module should not care, since M.2 is standardized.
>
> The pin #s are proposed at this time, Scotty has looked over the ICD 
> and generally
>
> agreed with what's there.
>
> Scotty is fabricating a mechanical prototype at the current time, and 
> described it
>
> verbally on the call last night. The clock dimensions were about 
> double the area of the UBlox
>
> module, so I have concerns whether everything will fit (Ublox, DAC, 
> filter, TCVCXO,
>
> Synthesizer, Synth 48M crystal, SPI and I2C interfaces and discretes).
>
> Scotty said he was planning to bring the prototype to DCC. I don't 
> think there is a
>
> drawing yet with the module outline and connector positioning. If you 
> are going to be at DCC
>
> then it would be good for you to look at it and comment on any issues. 
> If not, one could guess
>
> it's high up on Scotty's priority list of drawings to create.
>
> -- Tom, N5EG
>
> On Tue, Sep 10, 2019 at 8:56 AM Rick - W2GPS <w2gps at cnssys.com 
> <mailto:w2gps at cnssys.com>> wrote:
>
>     Tom,
>
>     I am ready to experiment with parts placement and 3D rendering for
>     the clock module but the mechanical and connector specs are still
>     TBD in the ICD. Where is the “system mechanical drawings and mock-up”?
>
>     Rick
>
>     W2GPS
>
>     *From:*TangerineSDR <tangerinesdr-bounces at lists.tapr.org
>     <mailto:tangerinesdr-bounces at lists.tapr.org>> *On Behalf Of *Tom
>     McDermott via TangerineSDR
>     *Sent:* September 9, 2019 10:11 PM
>     *To:* TAPR TangerineSDR Modular Software Defined Radio
>     <tangerinesdr at lists.tapr.org <mailto:tangerinesdr at lists.tapr.org>>
>     *Cc:* Tom McDermott <tom.n5eg at gmail.com <mailto:tom.n5eg at gmail.com>>
>     *Subject:* [TangerineSDR] Notes from PSWS / TangerineSDR call of
>     09-07-2019
>
>
>     Notes from PSWS / TangerineSDR call of 09-07-2019
>
>     1. Tom to clarify the magnetometer document to highlight that the
>     Ethernet extender cable carries I2C, not Ethernet, it's just
>     a standard off-the-shelf cable.
>
>     2. RF Modules are now 110mm x 50mm. May need to extend the board
>     so the SMA connectors clear the next board on top.
>
>     3. Can we use 1.8V LVDS on the RF module pins, or must they be
>     2.5V? The Analog Devices part is 1.8V only.
>
>     4. The GPS module appears possibly tight size-wise based on the
>     system mechanical drawings and mock-up.
>
>     -- Tom, N5EG
>
>

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