I received the unit. The shipping and packing was very good- no peanuts! The one I got was different from what I expected. It's a 5 MHz unit with 20 outputs. More than I could conceivably need. I looked inside. The supply is actually 25V. The input module has an FPGA for some reason, probably to communicate fault back to a host. The signal is distributed as a low level square wave on the backplane and amplified through a high gain tuned amp before going to the output amps. The outputs are all monitored.
I need to figure out the tuned circuit so I can retune it. Would the performance be better if I bypass the input module and drive the output modules with a sine wave? I'm using it as a reference for some not-too-sophisticated counters and generators so the phase noise will be much better than those could benefit from regardless. Demian Martin PDS ------------------------------ > > Message: 2 > Date: Mon, 20 Jul 2009 22:46:44 -0700 > From: "Demian Martin" <demian...@yahoo.com> > Subject: [time-nuts] EFRATOM MFTD-AC4 FREQUENCY REFERENCE DISTRIBUTION > AMP > To: <time-nuts@febo.com> > Message-ID: <9a1668b965254471953484d102b6a...@pdsdesktop> > Content-Type: text/plain; charset="us-ascii" > > > EFRATOM MFTD-AC4 FREQUENCY REFERENCE DISTRIBUTION AMP > I just bought this off eBay. I was about to look into > building one but for > $50 + $25 shipping I could not justify the effort. They have > 6 more. Item > number 290330439821. Probably a deal for the box alone. > > Is there anything I should know about it? I'm planning to mount a > Thunderbolt inside it. There is a decent datasheet on the > family of products > here: http://www.freewebs.com/beststuff2u/MFS-207.pdf > > Demian Martin _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
