[Test-Equipment] HP 8552

[Gary Schafer]

Which spectrum analyzer plug in are you using?
If it is the 8553 then it still could be the jumper. I have swapped several
8553 heads without the jumper installed and sometimes they work and
sometimes they don't. The trigger for the sweep goes thru the jumper but
sometimes it will trigger itself without the jumper.  Maybe this is not the
problem but something to check.

Check the voltages in the 8552. there are several regulators in there.

73
Gary  K4FMX

> -----Original Message-----
> From: Mark Donaldson [mailto:wa1qhq at yahoo.com]
> Sent: Friday, April 18, 2008 9:08 PM
> To: garyschafer at comcast.net; Discussion of Electronic Test Equipment
> Subject: RE: [Test-Equipment] HP 8552
> 
> Good suggestion but the 141T is not the problem since
> I do have a working spectrum analyzer plug-in that
> does work OK in the 141T, the problem is in the 8552,
> any more ideas.
> 
> Mark WA1QHQ
> 
> 
> --- Gary Schafer <garyschafer at comcast.net> wrote:
> 
> > The jumper is in the terminator plugs that go on the
> > back of the 141T. If I
> > remember right the jumper has to be in place if you
> > are using the 8553 rf
> > plug in but is not required for the 8554 plug in.
> > If you don't have the terminators that go into the
> > jacks you can put a
> > jumper wire on the proper pins. It is the center
> > conductors of two of the
> > coaxial connectors in the jacks. Don't short them to
> > ground!
> >
> > 73
> > Gary  K4FMX
> >
> > > -----Original Message-----
> > > From: jeremy-ge [mailto:geoffrey at jeremy.mv.com]
> > > Sent: Friday, April 18, 2008 3:04 PM
> > > To: garyschafer at comcast.net; Discussion of
> > Electronic Test Equipment
> > > Subject: Re: [Test-Equipment] HP 8552
> > >
> > > Where and what is this jumper??
> > >
> > > Geoff
> > >
> > >
> > > ----- Original Message -----
> > > From: "Gary Schafer" <garyschafer at comcast.net>
> > > To: "'Discussion of Electronic Test Equipment'"
> > > <test-equipment at mailman.qth.net>
> > > Sent: Friday, April 18, 2008 2:39 PM
> > > Subject: RE: [Test-Equipment] HP 8552
> > >
> > >
> > > > Be sure that you have the jumper in place on the
> > back of the 141
> > > > mainframe.
> > > > The sweep trigger goes thru there depending on
> > what modules are
> > > installed.
> > > >
> > > > 73
> > > > Gary  K4FMX
> > > >
> > > >> -----Original Message-----
> > > >> From: test-equipment-bounces at mailman.qth.net
> > [mailto:test-equipment-
> > > >> bounces at mailman.qth.net] On Behalf Of Mark
> > Donaldson
> > > >> Sent: Friday, April 18, 2008 10:49 AM
> > > >> To: test-equipment at mailman.qth.net
> > > >> Subject: [Test-Equipment] HP 8552
> > > >>
> > > >> I have 2 HP-8552 spectrum analyzer IF sections
> > that do
> > > >> not provide an auto sweep output anymore. The
> > manual
> > > >> scan mode works somewhat, it will move the
> > trace on
> > > >> the far right side of the 141T display. This
> > problem
> > > >> is associated with the 8552 not the 141T
> > mainframe
> > > >> however it is possible that the IF section was
> > damaged
> > > >> by a 141T mainframe that had power supply
> > issues.
> > > >> Before I dig into this I was hoping somebody
> > else has
> > > >> been down this road and knows which part was
> > likely to
> > > >> have vented its smoke to cause what I am
> > seeing.
> > > >>
> > > >>
> > > >>
> > > >>
> > >
> >
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> 
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