[hpsdr] Themis

[Helmut Oeller]

Thanks for additional info, John.

73, Helmut, DC6NY

 

Von: John C. Westmoreland, P.E. [mailto:john at westmorelandengineering.com] 
Gesendet: Samstag, 18. November 2017 13:24
An: Helmut Oeller <dc6ny at gmx.de>
Cc: HPSDR <hpsdr at openhpsdr.org>
Betreff: Re: [hpsdr] Themis

 

Hello Helmut,

 

Depends on the OXCO - for instance - for the MTI-270 - those specs are what that manufacturer claims.

 

All of the board logic that has anything to do with the disciplining paths are all ECL - and are tightly controlled and timing is known.

 

I have nice on-board RF switches that I made out of all ECL.  In fact, someone that helped me in the early days of this design has used

that RF switch concept (AFAIK).

 

I'm still bringing up the board; so I'll do my best to keep people posted.

 

Power consumption is a little on the high side due to the ECL of course.  I may be able to bring that down if I can remove some of the termination

resistors on some non-critical timing paths.

 

Thanks for your interest.

 

73's,

John

AJ6BC

 

 

 

 

On Sat, Nov 18, 2017 at 2:53 AM, Helmut Oeller <dc6ny at gmx.de <mailto:dc6ny at gmx.de> > wrote:

Hi John,

nice job, congratulations!

Are any data available, such as phase noise at 10/100/1000 Hz offset, stability
after appropriate and averaged measuring time, output level at 10 MHz port,
power consumption, switch-on delay, board dimensions etc.

73, Helmut, DC6NY

-----Ursprüngliche Nachricht-----
Von: Hpsdr [mailto:hpsdr-bounces at lists.openhpsdr.org <mailto:hpsdr-bounces at lists.openhpsdr.org> ] Im Auftrag von John C.
Westmoreland, P.E.
Gesendet: Samstag, 18. November 2017 10:35
An: HPSDR <hpsdr at openhpsdr.org <mailto:hpsdr at openhpsdr.org> >
Betreff: [hpsdr] Themis

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