[time-nuts] FE 5680A Warning

[k4cle at aol.com]

Just an inkling of the number of cellular base stations out there!  And that's just the ones made by Motorola.  There's probably twice or three times that many made by Lucent (I believe Lucent calls their Rb units FTU's for frequency and timing unit).

Connected by DROID on Verizon Wireless

-----Original message-----
From: Peter Bell <bell.peter at gmail.com>
To: Discussion of precise time and frequency measurement <time-nuts at febo.com>
Sent: Sun, Nov 13, 2011 18:32:26 GMT+00:00
Subject: Re: [time-nuts] FE 5680A Warning

The ones with the 2 labels have a date code as the 4 digit prefix on
the S/N - so a unit that says "S/N 0416-756124" was made in week 16
2004.  All the ones I've seen date from 2003 or 2004.

The board they were originally attached to was largely empty -
although it did have a label indicating that the board name was "HSO"
(presumably "high stability oscillator") and a part of serial number
stickers in a format that instantly made me think "Motorola" (the P/N
started with SGLA4000, IIRC).


On Mon, Nov 14, 2011 at 1:49 AM, mike cook <michael.cook at sfr.fr> wrote:
> Le 13/11/2011 18:21, Chuck Forsberg WA7KGX N2469R a écrit :
>>
>> Seems like a lot of folks selling these lately.
>> Curious minds would like to know why.
>
> I expect they are lots from telecom providers who are are replacing  kit
> that is being upgraded.
> I don't see any date codes on the boxes. Has anyone who has delved inside
> seen any information on date of manufacture?
>
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