Microwave surplus auction

[Iain McFadyen]

The biggest problem with these radios is the inter-facility link cable. We
have hundreds of Nera radios in service here and frankly, the IDU and ODU
are both rock solid.

Ignore the 11.405GHz label. That is just to help the technician understand
the RF channel used by the ODU at the top of the tower connected to that
IDU with the label. The IF going up the IFL cable is all fixed in the same
band.

We are also removing and scrapping a whole heap of long-haul NERA radios
here. 4, 5 7, 11, and 13 GHz RF allocations. I am trying to put some time
aside to investigate if there is anything of merit for the budding Amateur
Radio enthusiast in any of these units? Probably too broadband for EME use.
These long-haul radios have the RF units in the shelter, and elliptical
waveguide to reach the tower.

Iain

On Thu, Oct 8, 2015 at 11:58 AM, Rob Seastrom <rs at seastrom.com> wrote:

>
> Correct.  Though a stack of IDUs may have some value as spares,
> particularly if that's the part that generally fails (have no idea if
> that's the case for these).
>
> -r
>
> Alex Fraser <beatnic at comcast.net> writes:
>
> > Thanks Rob.  I take it the units if sold together would have more value?
> So
> > often the people charged with selling the stuff surplus have no idea
> what they
> > are selling.
> > Rob Seastrom wrote on 10/8/2015 10:29 AM:
> >
> >           Alex Fraser [[<beatnic at comcast.net>]] writes:
> >
> >                     These caught my eye,  It's Loudoun County surplus
> "Nera Microwave
> > units"  Looks like some sort of network gear. 11.405 GHz?
> >
> > [[http://www.publicsurplus.com/sms/auction/view?auc=1461662]]
> >
> >
> >      It's a mix of Nera and Ceragon equipment.  Ceragon bought Nera in
> > 2011.  Looks like the same stuff except for the badging.
> >
> > This equipment is split - indoor and outdoor units (IDU, ODU), with up
> > to 300m of coax between them.  These IDUs appear to have management
> > ethernets and 4 x T1 interfaces on a 50-pin interface connector that
> > you may recognize from applications in SCSI-2 and HSSI land.
> >
> > This auction is for just the IDUs.  Presumably the ODUs are still
> > bolted to towers somewhere or got sold for scrap.  Or maybe listed
> > elsewhere on that same auction site.
> >
> > But IDUs are not especially useful by themselves.  It's like buying a
> > transceiver with no output stage beyond the modulator and no receiver
> > front end ahead of the IF.
> >
> > -r
> >
> >
> >
> >
> > --
> >
> >     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> >        No electrons were harmed in the creation of this message
> >          --------------------------------------------------------
> >  ~~~******************* Alex Fraser *******************~~~
> >          --------------------------------------------------------
> > [[[[[[~~^^^#___=>>>```/\/\**O**/\/\```<<<=___#^^^~~]]]]]]
> >
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