[time-nuts] FE-5680A Schematics (v0.1)

bob grant bobgrant at fastmail.fm
Wed Feb 15 22:45:08 UTC 2012


FYI 

Schematics for the 60MHz to 10MHz out divider, directly behind the DB9.

There are 3 selectable output signals on the mini RF connector, 
either 10MHz or 60MHz (Square) and 10MHz bandpass filtered 

http://i1090.photobucket.com/albums/i370/bobgrant1/TimeNutz/clockout.png

Bob



On Wed, Feb 15, 2012, at 12:53 PM, Bob Camp wrote:
> Hi
> 
> Some of the schematic is less important for "how it works" but all of it
> is
> useful for troubleshooting. I wonder if splitting off stuff like tracing
> out
> the power supplies and heaters might be a good idea...
> 
> Once we get into things like typical voltage levels, we will need to look
> at
> multiple units anyway.
> 
> Bob
> 
> -----Original Message-----
> From: time-nuts-bounces at febo.com [mailto:time-nuts-bounces at febo.com] On
> Behalf Of Elio Corbolante
> Sent: Tuesday, February 14, 2012 8:31 PM
> To: time-nuts at febo.com
> Subject: [time-nuts] FE-5680A Schematics (v0.1)
> 
> at the following address:
> <
> http://www.rhodiatoce.com/pics/time-nuts/FE-5680A/FE-5680A_schematics_v0.1.p
> df
> >
> you will find the 0.1 release of the FE-5680A schematics.
> 
> New additions:
> - pinout of the unpopulated (24 pin) connector (J9) behind the DB9
> - connections between CPU/MAX3232 and the *TWO* serial ports!!!
> - component values of the 10MHz filter + option on PCB to output a square
> 10MHz wave on DB9
> - connections between CPU and MAX1246 (A/D converter)
> - connections between XC9572 and MAX392 (quad analog switch)
> - unknown pins marked as '?'
> 
> As you can see, it seems FE-5680A fully supports 2 serial ports:
> one on DB9 and the other one on the unpopulated connector (J9) behind
> DB9.
> 
> Any comments/suggestions are welcome.
> 
> .      ciao
> _        Elio.
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