Mon Apr 27 04:27:16 UTC 2009
different outputs, each module a .1, 1, 5, 10 MHz.
Most of the standards that same seller had appeared to be 5 MHz out so I =
expected a 5 meg input. That same data sheet states under MBF options =
most of the modules are 5/10 MHz input but two were dedicated 5 or 10 =
only. Perhaps we got the 5 meg only ! From what you are saying, each =
the MBF module is outputting the same thing, strictly distribution. =
fine, perhaps they meant the MFT would pass .1 to 10 meg. If that's the =
we should still be able to modify the input module. My application is =
same as yours, not a "time-nut" application!
I though it worth the gamble for the cheap price.
----- Original Message -----=20
From: "Demian Martin" <demianm_1 at yahoo.com>
To: <time-nuts at febo.com>
Sent: Thursday, July 23, 2009 3:48 AM
Subject: Re: [time-nuts] EFRATOM MFTD-AC4 FREQUENCY REFERENCE=20
DISTRIBUTIONAMP - update
>I received the unit. The shipping and packing was very good- no =
> The one I got was different from what I expected. It's a 5 MHz unit =
> outputs. More than I could conceivably need. I looked inside. The =
> actually 25V. The input module has an FPGA for some reason, probably =
> communicate fault back to a host. The signal is distributed as a low =
> square wave on the backplane and amplified through a high gain tuned =
> 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 =
> 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 =
> much better than those could benefit from regardless.
> Demian Martin
>> Message: 2
>> Date: Mon, 20 Jul 2009 22:46:44 -0700
>> From: "Demian Martin" <demianm_1 at yahoo.com>
>> Subject: [time-nuts] EFRATOM MFTD-AC4 FREQUENCY REFERENCE =
>> To: <time-nuts at febo.com>
>> Message-ID: <9A1668B965254471953484D102B6A96C at PDSDesktop>
>> Content-Type: text/plain; charset=3D"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
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