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Expanded Topics Messages
Date
Re: hp3561 info.

Pete Rawson
 

John,

Thanks for the comparative data, Since you've obviously researched
this stuff; how do the noise floors compare?

Pete Rawson
Re: hp3561 info.

John Miles
 

-----Original Message-----
From: hp_agilent_equipment@...
[mailto:hp_agilent_equipment@...]On Behalf Of Luis Cupido
Sent: Friday, September 25, 2009 10:25 AM
To: hp_agilent_equipment@...
Subject: Re: [hp_agilent_equipment] hp3561 info.


Tks John,

Is there another HP model you would recommend
as something really interesting instead of the 3561 ?
(radio ham pocket, ebay etc)

Yes below 10Hz is of interest :-(
If you have the bench/rack space, you might consider the 3562A or 3563A,
which have similar bandwidth and ADC limits as the 3561A but give you two
channels and some nifty firmware features. Otherwise I'd have to know
something about your application. If you can use an I/Q multiplier of some
sort to upconvert whatever you're measuring to a frequency within a stereo
sound card's usable bandwidth, then the sub-10 Hz limitation may not be a
deal-killer. (Plus, I believe some of the higher-quality sound cards do
have DC coupling options these days.)

I don't think HP built any FFT analyzers that went beyond 100 kHz that are
affordable on the used market now. Could be wrong about that, though.

-- john, KE5FX
Re: hp3561 info.

Luis Cupido
 

Tks John,

Is there another HP model you would recommend
as something really interesting instead of the 3561 ?
(radio ham pocket, ebay etc)

Yes below 10Hz is of interest :-(

Luis Cupido.


John Miles wrote:

Anyone familiar with the hp3561 can tell me
two basic things:

-Is the technology inside a lot based on asics or
traditional digital stuff?
A combination of both. The December 1984 HP Journal has a good collection
of articles on its design. Some of them even had 1-Mb bubble memories.

-Is the performance interesting or a good sound card + PC
is nowadays better ?
Sound cards can be much better performers if you don't need sub-1 Hz
response (most aren't DC-coupled) or the missing Nyquist headroom afforded
by the 3561A's higher sampling rate (256 ksps versus 192 ksps max for most
sound cards.) The 3561A's 13-bit dynamic range, single input channel, and
limited record length are its Achilles' heels.
The real difference is in software support. You can do a lot of useful DSP
analysis work with sound cards that would be impractical with a 3561A.
3561As are unusually well-designed and packaged, so they will always appeal
to the compulsive collector. :) But for the most part, you would only *use*
one if you needed to run legacy applications like the 3048A package.
-- john, KE5FX
------------------------------------
Yahoo! Groups Links
Re: hp3561 info.

John Miles
 

Anyone familiar with the hp3561 can tell me
two basic things:

-Is the technology inside a lot based on asics or
traditional digital stuff?
A combination of both. The December 1984 HP Journal has a good collection
of articles on its design. Some of them even had 1-Mb bubble memories.

-Is the performance interesting or a good sound card + PC
is nowadays better ?
Sound cards can be much better performers if you don't need sub-1 Hz
response (most aren't DC-coupled) or the missing Nyquist headroom afforded
by the 3561A's higher sampling rate (256 ksps versus 192 ksps max for most
sound cards.) The 3561A's 13-bit dynamic range, single input channel, and
limited record length are its Achilles' heels.

The real difference is in software support. You can do a lot of useful DSP
analysis work with sound cards that would be impractical with a 3561A.

3561As are unusually well-designed and packaged, so they will always appeal
to the compulsive collector. :) But for the most part, you would only *use*
one if you needed to run legacy applications like the 3048A package.

-- john, KE5FX
hp3561 info.

Luis Cupido
 

Hi,

Anyone familiar with the hp3561 can tell me
two basic things:

-Is the technology inside a lot based on asics or
traditional digital stuff?
-Is the performance interesting or a good sound card + PC
is nowadays better ?

Thanks.

Luis Cupido.
ct1dmk.
Re: 332A balance pots

 

I should clarify - I mean only to break the seal so I can open the pots, thoroughly clean everything out and then close them again. I would not do any cutting without then stripping the pot!
Re: HP8559A mainboard issue

 

Dear Mattc:
?
Not so simple !
?
It is the defective in mainboard !
?
I have one working unit and a defective unit , I find the mainboard problem , just exchange ALL boards.
?
Regard
Tony Cheung
SEP 25 2009

--- On Fri, 9/25/09, mattc <rmc321@...> wrote:


From: mattc <rmc321@...>
Subject: [hp_agilent_equipment] Re: HP8559A mainboard issue
To: hp_agilent_equipment@...
Date: Friday, September 25, 2009, 10:24 AM


?



Hi Tony,
I'm not too familiar with this instrument, but doesn't the front panel of the 8559A have a Frequency Calibrator button to correct the errors between the displayed and actual frequencies?
Matt
--- In hp_agilent_equipmen t@yahoogroups. com, "tonycheung_ hk" <tonycheung_ hk@...> wrote:

Dear members:

Anyone had experience to repair the MAIN Board of HP8559A ?

Problem is displaied signal lower than actually value.


Regard
Tony Cheung
SEP 25 2009


















[Non-text portions of this message have been removed]
Re: Agilent E4420 series Sig Gen

Paul Read
 

Hi Steve,

I currently have an E4422b on my bench, and have found it to be very good. The unit I have has various modulation sources including a function generator, and the performance of that is excellent , I would certainly make room for one on my bench at home. It would replace at least 2 boxes there, so the XYL would be pleases :o)
The unit also includes sweeps of frequency and power.
Yum !

73
Paul
Re: 7562A Log Voltmeter/Converter

 

how many do you have??

----- Original Message -----
From: David C. Partridge
To: hp_agilent_equipment@...
Sent: Thursday, September 24, 2009 12:02 PM
Subject: RE: [hp_agilent_equipment] 7562A Log Voltmeter/Converter


Arthur, no I'm not in the USA. I'm based in the UK.

I understand what they do, but I don't need that function, and would happily
sell them on to a new home rather than scrap 'em.

(though I don't think that using them for a project qualifies as scrapping -
they are very nice boxes).

Dave

-----Original Message-----
From: hp_agilent_equipment@...
[mailto:hp_agilent_equipment@...] On Behalf Of arthurok
Sent: 24 September 2009 16:13
To: hp_agilent_equipment@...
Subject: Re: [hp_agilent_equipment] 7562A Log Voltmeter/Converter

dont scrap it
they were designed to logrithmicly compress a signal
before going into a chart recorder if you dont like it maybe i
can buy it from you.
are you in the usa??
Re: HP8559A mainboard issue

 

Hi Tony,
I'm not too familiar with this instrument, but doesn't the front panel of the 8559A have a Frequency Calibrator button to correct the errors between the displayed and actual frequencies?
Matt

--- In hp_agilent_equipment@..., "tonycheung_hk" <tonycheung_hk@...> wrote:

Dear members:

Anyone had experience to repair the MAIN Board of HP8559A ?

Problem is displaied signal lower than actually value.


Regard
Tony Cheung
SEP 25 2009
Re: Step attenuator repair stuff uploaded in files section

 

Thanks, Jacques! Got it.

Daun

_____

From: hp_agilent_equipment@...
[mailto:hp_agilent_equipment@...] On Behalf Of ve2_azx
Sent: Thursday, September 24, 2009 2:39 PM
To: hp_agilent_equipment@...
Subject: [hp_agilent_equipment] Re: Step attenuator repair stuff uploaded in
files section




I tried to upload Lothar's file in the files section, but it was not
successful.
So I have provided a link to it on my web site. I have also added some more
photos at the end.


<>
s.com/ve2_azx/HP_StepAttenuatorRepair.pdf

Jacques, VE2AZX

--- In hp_agilent_equipmen <mailto:hp_agilent_equipment%40yahoogroups.com>
t@..., "Daun Yeagley" <daun@...> wrote:

I just tried to find that file also, but it doesn't seem to be there.
Lothar, is there any chance to re-post it?
This would be useful, and I must admit that I had missed the original
post.
I notice that the file space for the list is pretty much full, and
probably
needs to be weeded out. Might try uploading to another site, like
Didier's.

Daun
Part needed for a HP 6227B Dual Power Supply

Tom Miller
 

Greetings,

Does anyone have a parts hanger queen that can supply a switch. It is the
Volts/Amps slide switch, part number 3101-1288, a 3-pole - double throw
slide switch.

With fingers crossed,
Tom
Foot Assy for hp_equipment

 

For my opinion, the "HP Feet" are a mis-construction.

Maybe a good idea, a cheap solution, but in fact bullshit.

;-)


Peter
Agilent E4420 series Sig Gen

 

Am looking at one of these...anybody have experience with them or have knowledge / opinions about them.

Thanks,
Steve
WD4GYN
Re: Step attenuator repair stuff uploaded in files section

 

I tried to upload Lothar's file in the files section, but it was not successful.
So I have provided a link to it on my web site. I have also added some more photos at the end.



Jacques, VE2AZX

--- In hp_agilent_equipment@..., "Daun Yeagley" <daun@...> wrote:

I just tried to find that file also, but it doesn't seem to be there.
Lothar, is there any chance to re-post it?
This would be useful, and I must admit that I had missed the original post.
I notice that the file space for the list is pretty much full, and probably
needs to be weeded out. Might try uploading to another site, like Didier's.

Daun
Re: Foot Assy for (Re: 7562A Log Voltmeter/Converter)

 

I spoke casually; I was just distinguishing between the three (known to me)
System I sizes. An example of narrow is the 400C/E/F/G. Then you have
the medium size, which is a bit more than 1/3-rack.
You can't fit three, but two leave a big gap. (And finally of course
the full-rack size.)

Sorry,
Dave Wise

-----Original Message-----
From: hp_agilent_equipment@...
[mailto:hp_agilent_equipment@...]On Behalf Of David C.
Partridge
Sent: Thursday, September 24, 2009 10:16 AM
To: hp_agilent_equipment@...
Subject: RE: Foot Assy for (Re: [hp_agilent_equipment] 7562A Log
Voltmeter/Converter)


Dave, you describe these as 1/3 wide, but only two fit into a 19" rack
adapater (they came out of one with p/n 5060-8764).

Or am I missing something here?

Dave

-----Original Message-----
From: hp_agilent_equipment@...
[mailto:hp_agilent_equipment@...] On Behalf Of David Wise
Sent: 24 September 2009 17:11
To: 'hp_agilent_equipment@...'
Subject: RE: Foot Assy for (Re: [hp_agilent_equipment] 7562A Log
Voltmeter/Converter)

That cabinet design is known as System I, as are the feet,
but the only size
that's commonly available is the single.
The seven-inch bar for the 1/3-wide cabinet is rare; I'm also
looking for
two for my 5210A Frequency Meter.
In the meantime we can use generic stick-ons, but we'll have
to do without
the bail.

Dave Wise



------------------------------------

Yahoo! Groups Links
HP8559A mainboard issue

 

Dear members:

Anyone had experience to repair the MAIN Board of HP8559A ?

Problem is displaied signal lower than actually value.


Regard
Tony Cheung
SEP 25 2009
Agilent Displays

 

Hello All
Does anyone have a compatible Display information
for HP Part 1990-0490 ( I Think it is a STD 7 Seg Display )
Comes out from HP 3575A.
Don't want to take a chance.
Thanks
M8JPK
Re: Foot Assy for (Re: 7562A Log Voltmeter/Converter)

David C. Partridge
 

Dave, you describe these as 1/3 wide, but only two fit into a 19" rack
adapater (they came out of one with p/n 5060-8764).

Or am I missing something here?

Dave

-----Original Message-----
From: hp_agilent_equipment@...
[mailto:hp_agilent_equipment@...] On Behalf Of David Wise
Sent: 24 September 2009 17:11
To: 'hp_agilent_equipment@...'
Subject: RE: Foot Assy for (Re: [hp_agilent_equipment] 7562A Log
Voltmeter/Converter)

That cabinet design is known as System I, as are the feet, but the only size
that's commonly available is the single.
The seven-inch bar for the 1/3-wide cabinet is rare; I'm also looking for
two for my 5210A Frequency Meter.
In the meantime we can use generic stick-ons, but we'll have to do without
the bail.

Dave Wise
Re: 7562A Log Voltmeter/Converter

David C. Partridge
 

Arthur, no I'm not in the USA. I'm based in the UK.

I understand what they do, but I don't need that function, and would happily
sell them on to a new home rather than scrap 'em.

(though I don't think that using them for a project qualifies as scrapping -
they are very nice boxes).

Dave

-----Original Message-----
From: hp_agilent_equipment@...
[mailto:hp_agilent_equipment@...] On Behalf Of arthurok
Sent: 24 September 2009 16:13
To: hp_agilent_equipment@...
Subject: Re: [hp_agilent_equipment] 7562A Log Voltmeter/Converter

dont scrap it
they were designed to logrithmicly compress a signal
before going into a chart recorder if you dont like it maybe i
can buy it from you.
are you in the usa??
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