[time-nuts] FE-5680A arrived

Joseph Gray jgray at zianet.com
Wed Jan 11 06:11:17 UTC 2012


I'm not seeing a PPS on either of these. All I see is about 17 mV P-P
of noise that looks like a multi-stepped sine wave. I'm using a TDS
340 scope.

Joe Gray
W5JG

On Tue, Jan 10, 2012 at 10:30 PM, J. L. Trantham <jltran at att.net> wrote:
> I confess!
>
> I, too, could not resist the opportunity to 'commune' with the members of
> the list with these Rb units.
>
> I ordered two of the FE-5680A units ($36 ea. including shipping) from the
> same supplier with amazing speed (order date 1/4, arrival date 1/9 to NW
> Florida).
>
> They were marked 'FE-5680A UN 70021' 'S/N 0405-72179' and 'FE-5680A UN
> 71920' 'S/N 0413-75933'.
>
> I promptly came home, constructed a DB9 female connector, with the
> connections as specified in recent postings, and both units were up and
> locked with extremely close agreement with my TBolt and Z3816A in under 5
> minutes.  Pin 6 had a 1 uSec wide, 5 Volt, 1 PPS, pulse.  I did not explore
> pins 8 or 9, the RS232 pins.  I guess I'll have to go back through the list
> to see what, exactly, I can do with these.
>
> They, too, were packed with bubble wrap individually and then together, and
> in a plain envelope that was placed in a UPS plastic envelope.  However,
> they arrived without damage, and, amazingly, very promptly.
>
> Not sure what, exactly, I will do with them yet, but they will certainly
> have many possible roles.
>
> Joe
> WB4BPP
>
>
>
> -----Original Message-----
> From: time-nuts-bounces at febo.com [mailto:time-nuts-bounces at febo.com] On
> Behalf Of Joseph Gray
> Sent: Tuesday, January 10, 2012 8:04 PM
> To: Discussion of precise time and frequency measurement
> Subject: [time-nuts] FE-5680A arrived
>
> With all the talk on the list about these things, and considering the
> price, I could no longer resist temptation and ordered two from
> nichegeek.
>
> First, I was amazed at the speed at which I received these units. The
> order was placed last Friday, the shipment went out late Saturday and
> I received them today (Tuesday). In my experience, it has always taken
> two weeks or more to receive anything from China. I couldn't believe I
> got these in just three days.
>
> BTW, I paid $38 each with the free shipping. An outstanding deal IMO.
> I also received the semi-useless freebies.
>
> My only quibble so far is that both units were packed in nothing more
> than a large envelope, with a thin layer of bubble wrap added. Nothing
> is dented or rattling around, so hopefully they are OK. I'm just about
> to wire up a cable and power them on, so I'll know soon.
>
> The units I got have numbers of UN 71xxx and UN 78xxx. I don't know
> exactly what this means, but according to the ebay sellers, they are
> claiming that 6xxxx and 7xxxx numbers indicate newer units. Can anyone
> decipher this number sequence?
>
> Joe Gray
> W5JG
>
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