[TangerineSDR] DCC discussion list

[Tom McDermott]

HI Phil - We certainly will need requirements on power & distribution
characteristics.

However I think we first may need a plan.

Question 1: do we operate off:
Option A: 120VAC input  (North America)
Option B: 120-240VAC input (Worldwide)
Option C:  + 12VDC input?    [ +12V means in my view  +10.5 to +13.8 VDC,
allowing a battery to be the power input. ]

In my view Option C is the easiest for project engineering, but requires
the user to generate +12V, battery charge, etc.
Given the possible worldwide AC variables, battery type and size variables,
etc., it avoids many issues.

If we were to choose Option C then, at the system level then:
Question 2 how do we create needed voltages:
Option 1. Data Engine regulates & distributes all the system voltages from
a single +12VDC  (11-13.8V) input.
Option 2: Separate DC supply derives all the needed voltages from +12VDC
(11-13.8V) input.
Option 3: Each module derives it's own voltages from a +12VDC (11-13.8V)
input.

-- Tom, N5EG





On Thu, Sep 12, 2019 at 7:00 PM Phil Erickson <phil.erickson at gmail.com>
wrote:

> Hi Tom,
>
>   It is probably good for item 5 to think about whether cleanliness specs
> for the power supply are required.  As you know, hash on the DC lines could
> be a major RFI problem.  (Batteries would tend not to have that issue,
> hence their mention earlier.)
>
> 73
> Phil
>
> On Thu, Sep 12, 2019 at 9:58 PM Tom McDermott via TangerineSDR <
> tangerinesdr at lists.tapr.org> wrote:
>
>> I've combed the meeting notes and some other thoughts and put together a
>> frist draft of possible DCC discussion topics for HAMSCI / TangerineSDR.
>> Please review and send me additions, deletions, changes, etc. by Monday
>> the 16th and I'll iterate once before the conference.
>>
>> -- Tom, N5EG
>>
>>
>> *HAMSCI project discussion Topics for DCC 2019*
>>
>> 1.    Need cost estimates for the Clock, DE, RF, and Magnetometer modules.
>> 2.    What is the schedule for the modules, testing, prototypes?
>>    a.    Data Engine
>>    b.    2-chan RF receiver
>>    c.    GPS Clock
>>    d.    Magnetometer
>>    e.    Other ? SBC, Power supply, etc.
>> 3.    Each module will have a unique manufacturer serial number based on
>> some PROMs that have this capability. Any issues with the number or format?
>> 4.    Do we need to create any videos describing what the project is,
>> what the objectives are, status, or other?
>> 5.    No discussion so far on power supplies, other than a request for
>> +12V battery power capable. Do we need a plan?
>> 6.    HAMSCI 2020
>>    a.    Any more information on the location?
>>    b.    Should we plan a demo of TangerineSDR or the completed parts?
>> 7.    Receive Antennas. Mike Pappas has acquired a calibrated filed
>> strength meter, we discussed seeing if DX Engineering would let us measure
>> a production lot of antennas (10?) to determine the field strength
>> sensitivity and variance.
>> 8.    Do we need a test plan for the system?
>> 9.    Upload data compression appears feasible (3:1 ?).  Do we need any
>> study or proposals of how much data we are asking folks to upload? Or is
>> this better to determine experimentally?
>>
>>
>>
>> --
>> TangerineSDR mailing list
>> TangerineSDR at lists.tapr.org
>> http://lists.tapr.org/mailman/listinfo/tangerinesdr_lists.tapr.org
>>
>
>
> --
> ----
> Phil Erickson
> phil.erickson at gmail.com
>
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