Re: Agilent E4404B Spectrum Analyzer With Dead PSU Repair
Apologize for the 2MB size photos, I was in a rush.
And also, the SMPS was powered from an isolation transformer?
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Re: Agilent E4404B Spectrum Analyzer With Dead PSU Repair
After a bit of reading I sort of understand the start up procedure of a typical SMPS. A start up capacitor is charged from rectified mains, usually via a power resistor. This cap is connected to the controller circuit supply rail. When the psu is turned on and the caps is charged enough, the controller is turned on and starts driving the main switching transformer via a power MOSFET. On the main switch transformer, a small secondary winding output is rectified and fed to the controller circuit, this will now power the controller instead of the small start up cap.
I managed to ID the startup cap, which measured fine.
I then probe 2 points, the PWM controller supply pin(fed from a LT1121 regulator) and the secondary winding output.
The scope shows that the startup cap circuit works fine. But the output of the secondary winding isn¡¯t. It only shows oscillation for about 50ms before disappearing, causing the circuit to shut down and restart. I¡¯ll do more probing around the controller, driver section tonight.
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Re: Welcome, Leo! I know I've seen your name before; are you on the TekScopes group? That's a nice HPAK gear collection you have. Unfortunately I can't help you with your 54620C. I had a 54504A for a while and currently have a 54120B. All my other scopes (4 at the moment) are Tektronix. I fix want to welcome you to the HPAK group, though. Jim Ford, Laguna Hills, California, USA Sent from my T-Mobile 4G LTE Deviceber
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Sounds good!
It would be interesting to see a screenshot of the hardware page where it lists the hardware modules inside the analyser.
Somewhere on the HDD there will be all the *.LIC files for your options. It's worth making several copies of these. I'm assuming they will be in *.LIC format. They might be configured in Windows as hidden files though.
It would be interesting to see how the noise figure option works. You can make a basic 28V noise source for under $10 that would prove functionality. A genuine HP 346A/B/C noise source will obviously be very expensive.
I have two homebrew 28V noise sources here that work well with the Agilent PSA.
I'd also strongly recommend that you make or buy a dc block for the front end. That's because I'm assuming this analyser will not be dc blocked. If it is already dc blocked then I guess you won't need one. At work, the biggest killer of a spectrum analyser front end is from external DC fed to the input.
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Well mine has arrived and the reason the whole tread was started, which hasn't been hijacked too much but would like to report on my findings on the unit delivered.
Seems OK, bit scruffy but fully functional with Noise Figure, Analog demod (inc FM stereo) and phase noise + all the other (somewhat useless to me) demod types.
I think it's got the enhanced display and prec ref too, will check again.
These are the options listed in the sale;
N6141-2FP, N9020A-2FP,N9020A- 503, N9020A-B25 ,N9020A-EDP ,N9020A-P03,N9020A-PFR, N9060A-2FP ,N9060A-3FP,N9060A-4FP,N9060A-5FP,N9060A-6FP,N9060A-7FP,N9063A-2FP,3FP,N9064A-1FP,2FP,N9068A-2FP,N9069A-1FP,2FP,N9071-2FP,3FP,N9072A-2FP,N9073A-1FP,2FP, N9075A-2FP,N9076A-1FP,N9077A-1FP,2FP N9079A-1FP,2FP,N9080A-1FP,2FP, N9082A-1FP,2FP.
Sure the serial number isn't even recognised by Keysight and personally I dont care as it's never going anywhere near them and will remain in my lab till it passes away, gracefully I hope!
Total cost including the ?100 ish import fee was ?1600. I'm ok with that as my business is my hobby and can offord to buy equipment at this price.
I'd like to add new features if possible and make a copy of the HDD.
Minor niggle is I have no Admin rights which is a pain but easily circumvented.
Cheers
JohnB.
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In the case of Alltest, it's normal for it to have both names, since you can see that the processor board has been changed, since the instrument is now running Windows 7. At the time of its release, this MXA was running Windows XP. I personally own an N9020A whose processor board has been officially changed to a Windows 7 version. It's sticked Agilent on the front panel and when it starts up, the Windows welcome screen shows a splendid Keysight logo. But at least mine is officially supported by Keysight France, whereas I know perfectly well, having asked my friends at Keysight, that most of those sometimes found in China or Korea won't be. There is indeed a serial number server on the Keysight website which allows you, whenever you want to buy a piece of equipment, to check whether the version to be purchased corresponds to the indication on the Keysight site.
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Re: HP6643A - Blows Fuse When Activated
You may need a higher wattage bulb ¡ What is the rated current draw of the DUT?? I have a whole set of bulbs up to 200W and can parallel them for more if necessary. ? D. ?
toggle quoted message
Show quoted text
From: [email protected] <[email protected]> On Behalf Of Michael Yellin
Sent: 25 April 2024 03:02
To: [email protected]
Subject: Re: [HP-Agilent-Keysight-equipment] HP6643A - Blows Fuse When Activated? All, I finally obtained a proper bulb -- turns out, my GF had an unopened package of 2 60 watt incandescent?bulbs.? Woo hoo.? Finally got the bulb connected after removing the fuse holder.? HOWEVER, now, as soon as I turn the unit on, the bulb goes full bright, and nothing is displayed on the screen anymore.? Not sure if it is booting up "activated" or what.? Definitely not good...worries that the last time it booted something happened and the fuse wasn't fast enough or ....? Any help is greatly appreciated.?? ? On Sat, Apr 13, 2024 at 5:58?PM Harvey White <madyn@...> wrote: Appliance bulbs in particular.? Are halogen considered incondescent?
They are.? May not quite work the way you think, but they are. They're
higher temperature than normal incandescent.? Definitely look for
appliance bulbs.
Harvey
> On Sat, Apr 13, 2024, 5:15?PM Peter Gottlieb <hpnpilot@...> wrote:
>
>? ? ?They sell them in the local Home Depot, appliance bulbs and
>? ? ?halogens bulbs.
>
>
>? ? ?On 4/13/2024 6:23 PM, Michael Yellin wrote:
>? ? ?> I can't believe how difficult it is to find an incandescent
>? ? ?bulb.? Gotta wait
>? ? ?> to get one from Ebay.
>? ? ?>
>? ? ?> On Mon, Apr 8, 2024, 9:27?PM Michael Yellin via
>? ? ?<> <>
>? ? ?> <michaelhq54=[email protected]> wrote:
>? ? ?>
>? ? ?>? ? ?Will do.? Thanks for the offer, I plan to take you up on it.
>? ? ?>
>? ? ?>? ? ?On Mon, Apr 8, 2024 at 4:43?PM Peter Gottlieb
>? ? ?<hpnpilot@...> wrote:
>? ? ?>
>? ? ?>? ? ? ? ?Try starting with a 60 Watt incandescent.
>? ? ?>
>? ? ?>? ? ? ? ?If you need help troubleshooting the supply I would be
>? ? ?happy to assist.
>? ? ?>
>? ? ?>? ? ? ? ?Peter
>? ? ?>
>? ? ?>>? ? ? ? ?On Apr 8, 2024, at 7:33?PM, Michael Yellin
>? ? ?<michaelhq54@...> wrote:
>? ? ?>>
>? ? ?>>? ? ? ? ??
>? ? ?>>? ? ? ? ?Peter,
>? ? ?>>
>? ? ?>>? ? ? ? ?This idea "You could wire an incandescent bulb in place
>? ? ?of the fuse
>? ? ?>>? ? ? ? ?so you don't keep blowing them.? Find a wattage that
>? ? ?will allow the
>? ? ?>>? ? ? ? ?supply to boot, but then light
>? ? ?>>? ? ? ? ?up when the short occurs" is very interesting. How can
>? ? ?I choose the
>? ? ?>>? ? ? ? ?appropriate wattage of light?
>? ? ?>>
>? ? ?>>? ? ? ? ?Thanks,
>? ? ?>>? ? ? ? ?Michael
>? ? ?>>
>? ? ?>>? ? ? ? ?On Sat, Apr 6, 2024 at 7:05?PM Peter Gottlieb
>? ? ?<hpnpilot@...> wrote:
>? ? ?>>
>? ? ?>>? ? ? ? ? ? ?Could be a lot of things.? The manual is available
>? ? ?on the web.
>? ? ?>>? ? ? ? ? ? ?At quick glance
>? ? ?>>? ? ? ? ? ? ?it seems when the supply is "on" before being
>? ? ?enabled, the main
>? ? ?>>? ? ? ? ? ? ?transformer and
>? ? ?>>? ? ? ? ? ? ?rectifiers are live.? You can verify by measuring
>? ? ?at the main
>? ? ?>>? ? ? ? ? ? ?electrolytics.
>? ? ?>>
>? ? ?>>? ? ? ? ? ? ?My guess is something is wrong with the pass
>? ? ?elements and the
>? ? ?>>? ? ? ? ? ? ?supply crowbars
>? ? ?>>? ? ? ? ? ? ?but doesn't limit current and the fuse takes over.?
>? ? ?You may be
>? ? ?>>? ? ? ? ? ? ?able to max out
>? ? ?>>? ? ? ? ? ? ?the crowbar OVP limit and not blow the fuse but
>? ? ?that won't solve
>? ? ?>>? ? ? ? ? ? ?the problem.
>? ? ?>>
>? ? ?>>? ? ? ? ? ? ?You could wire an incandescent bulb in place of the
>? ? ?fuse so you
>? ? ?>>? ? ? ? ? ? ?don't keep
>? ? ?>>? ? ? ? ? ? ?blowing them.? Find a wattage that will allow the
>? ? ?supply to boot,
>? ? ?>>? ? ? ? ? ? ?but then light
>? ? ?>>? ? ? ? ? ? ?up when the short occurs.
>? ? ?>>
>? ? ?>>? ? ? ? ? ? ?Peter
>? ? ?>>
>? ? ?>>
>? ? ?>>
>? ? ?>>? ? ? ? ? ? ?On 4/6/2024 9:48 PM, Harvey White wrote:
>? ? ?>>? ? ? ? ? ? ?> if the fuse blows when activated, then something
>? ? ?downstream of
>? ? ?>>? ? ? ? ? ? ?the fuse, (once
>? ? ?>>? ? ? ? ? ? ?> activated) is likely a short. Assuming that the
>? ? ?high amperage
>? ? ?>>? ? ? ? ? ? ?fuse blows
>? ? ?>>? ? ? ? ? ? ?> roughly as fast as the low amperage fuse (don't
>? ? ?try to measure
>? ? ?>>? ? ? ? ? ? ?it......) then
>? ? ?>>? ? ? ? ? ? ?> you're likely looking at a dead short downstream
>? ? ?of the fuse.
>? ? ?>>? ? ? ? ? ? ?>
>? ? ?>>? ? ? ? ? ? ?> Harvey
>? ? ?>>? ? ? ? ? ? ?>
>? ? ?>>? ? ? ? ? ? ?> On 4/6/2024 7:18 PM, Michael Yellin wrote:
>? ? ?>>? ? ? ? ? ? ?>> Mates,
>? ? ?>>? ? ? ? ? ? ?>>
>? ? ?>>? ? ? ? ? ? ?>> Recently acquired an HP 6643A.? When the unit is
>? ? ?plugged in
>? ? ?>>? ? ? ? ? ? ?and turned on, it
>? ? ?>>? ? ? ? ? ? ?>> boots, and seems fine. However, as soon as the
>? ? ?unit is
>? ? ?>>? ? ? ? ? ? ?"activated" to
>? ? ?>>? ? ? ? ? ? ?>> generate voltage and amperage, the glass fuse
>? ? ?blows.? I don't
>? ? ?>>? ? ? ? ? ? ?have an endless
>? ? ?>>? ? ? ? ? ? ?>> supply of fuses, but I have tried some very low
>? ? ?and very high
>? ? ?>>? ? ? ? ? ? ?voltage and
>? ? ?>>? ? ? ? ? ? ?>> amperage settings, but that made no difference
>? ? ?(I didn't think
>? ? ?>>? ? ? ? ? ? ?it would, but
>? ? ?>>? ? ? ? ? ? ?>> well, it made me feel better to try) Opened her
>? ? ?up, looked
>? ? ?>>? ? ? ? ? ? ?around, and
>? ? ?>>? ? ? ? ? ? ?>> everything appears fine, no burnt parts, no
>? ? ?bulging caps, no
>? ? ?>>? ? ? ? ? ? ?melted wires,
>? ? ?>>? ? ? ? ? ? ?>> and nothing obviously shorted. Anyone have any
>? ? ?ideas what
>? ? ?>>? ? ? ? ? ? ?could be wrong, or
>? ? ?>>? ? ? ? ? ? ?>> can send me down a path to try and resurrect the
>? ? ?thing.
>? ? ?>>? ? ? ? ? ? ?>>
>? ? ?>>? ? ? ? ? ? ?>> TIA
>? ? ?>>? ? ? ? ? ? ?>> Michael
>? ? ?>>? ? ? ? ? ? ?>>
>? ? ?>>? ? ? ? ? ? ?>
>? ? ?>>? ? ? ? ? ? ?>
>? ? ?>>? ? ? ? ? ? ?>
>? ? ?>>? ? ? ? ? ? ?>
>? ? ?>>? ? ? ? ? ? ?>
>? ? ?>>? ? ? ? ? ? ?>
>? ? ?>>
>? ? ?>>
>? ? ?>>
>? ? ?>>
>? ? ?>>
>? ? ?>>
>? ? ?>
>
>
>
>
>
>
>
|
I have no financially interest in this-but please look up the seller I refer to.He clearly states that their MXA`s have been ``fixed`` regarding options,so no Keysight Lab will service/cal it..The alltest link were just to show that even? Keysight interchange frontpanels logo and installed firmware¡. No more from me. Besides I do admire your xdevs site-good work. Best Regards Hardy ? ? And what is the point I missed? If service is done by legit repair lab or Keysight, S/N does not change and it will always be matching.
Alltest you linked is a legit unit with everything mathing up nicely, including records in Keysight calibration database, with report available from 1 December 2009.
No problems with the machine you linked, unlike any of the chinese units.
toggle quoted message
Show quoted text
On 04/25/2024 3:48 AM, hardyhansendk via groups.io wrote: Hello?? Illya You misunderstand the point! In some cases they interchange mainframes-front-panel and processor boards!You are that in some cases hostid and serial nr doesn¡¯t matc-they don¡¯t care to fix it-even its possible.Alltest also sell these machines-made a link.Look close..its both an Agilent AND Keysight!!so???
Hardy ? ? Hello Hardy,
EXT is E6607B :
They are obviously legit Agilent/Keysight hardware and components, including software and license server. But MXA you see on all those ebay listings are modified units and they run modified license servers, made to work with any serial number and license key. Dead give away available on the screenshots of the listings, where you see machine HostID S/N and actual S/N of the unit not matching up. Legitimate licenses issued by Keysight always match in S/N. If you look very closely you can also see that all these $1-2k MXAs have aftermarket labels, like the font and logos don't match actual factory made Keysight/Agilent N9020A.
It's also easy to check by running S/N of converted MXA via Keysight support database to see what it comes back to ;)
Now , do they work as real 3.6GHz MXA? Yes, at least I had all the basic functions behave as expected.
But it does not mean they would be supported, serviced or related to Keysight in any official way anymore after such "conversion". :)
On 04/25/2024 1:07 AM, hardyhansendk via groups.io wrote: Hi I am not sure I understand your statement!! These MXA`s are genuie Agilent/keysight N9020A analyzers-These resellers did get many and some were obviously a mix of mainframe and processor board.If you look closely at them you find ??they use a license server¡ªno copy cat !!!.Thats necessary because the machines id are located in two places¡ªmidplane board and processor board¡this process are also described in the MXA service manual!! Regarding options-I know they can make specific options¡ªstill no copy cat!!...and at least one reseller also can calibrate equipment. Whats EXT ? Regards Hardy ? ? I've got mine few years back. They get lot of EXT units when upgraded their cell tower base station test labs to newer and faster equipment. EXT is essentially MXA hardware with different personality and additional source hardware for wireless testing. All these sellers took that additional hardware, modified the ID on these units to become a standard MXA 9020 and copied software licenses for these units to work as MXA. Some of the sellers claim to calibrate them to match 3.6GHz specs of "real" 9020, but there are no any traceable papers obviously. So that's what they are. Mine unit works fine, but I'm not experienced in RF domain, my interests usually stop at 50 MHz (not GHz!) :-)
If anybody wants some tests, I can probably run them and post results, but keep in mind that I don't have the usual RF hardware in my DC/LF lab.
BR,
Illya
xDevs.com
On 04/19/2024 8:59 AM, hardyhansendk via groups.io wrote: Please understand the way they do it over there!! Even simpler things have similar . multiple outlets- at ?ec alliexprex.It seems they do not care as we do do. But I and several others in Canada-UK-Australia,Denmark have received good well packaged MXA``?s from---THEM¡.-I have receive 4!!! So bogus?? Your choice. Hardy ? ? Yes Carsten the same items are listed with multiple sellers and understand it looks a bit bogus.
However it looks like mobile phone manufacturers are getting rid of their old test kit to anyonyone and various 3rd parties are selling them on.
They've probably got 100's if not 1000's of them.
Some seem to have no idea and eventually found a seller via the .com site rather than the .co.uk site with a better price and who was willing to communicate, show pictures of the options etc.
The adverts are poor and cut and pasted and do say 'Brand new', XP system etc as the sellers dont know what they are selling.
You may be able to get a $1200 one with all the options if you look hard enough. I paid a bit more but as a run a business so it hurts less!!
Will report back when it arrives.
Regards to all
p.s. Oh just to answer the other question re 'Is it any better than a 8566B'
Yes, very much so as it's way more than a Swept Spec Ani.
?
?
?
|
And what is the point I missed? If
service is done by legit repair lab or Keysight, S/N does not
change and it will always be matching.
Alltest you linked is a legit unit with everything mathing up
nicely, including records in Keysight calibration database, with
report available from 1 December 2009.
No problems with the machine you linked, unlike any of the chinese
units.
On 04/25/2024 3:48 AM, hardyhansendk via groups.io wrote:
toggle quoted message
Show quoted text
Hello??
Illya
You misunderstand the
point!
In some cases they
interchange mainframes-front-panel and processor boards!You
are that in some cases hostid and serial nr doesn¡¯t
matc-they don¡¯t care to fix it-even its possible.Alltest
also sell these machines-made a link.Look close..its both an
Agilent AND Keysight!!so???
Hardy
?
?
Hello Hardy,
EXT is E6607B :
They are obviously legit Agilent/Keysight hardware and
components, including software and license server. But MXA
you see on all those ebay listings are modified units and
they run modified license servers, made to work with any
serial number and license key. Dead give away available on
the screenshots of the listings, where you see machine
HostID S/N and actual S/N of the unit not matching up.
Legitimate licenses issued by Keysight always match in S/N.
If you look very closely you can also see that all these
$1-2k MXAs have aftermarket labels, like the font and logos
don't match actual factory made Keysight/Agilent N9020A.
It's also easy to check by running S/N of converted MXA via
Keysight support database to see what it comes back to ;)
Now , do they work as real 3.6GHz MXA? Yes, at least I had
all the basic functions behave as expected.
But it does not mean they would be supported, serviced or
related to Keysight in any official way anymore after such
"conversion". :)
On 04/25/2024 1:07 AM, hardyhansendk via groups.io wrote:
Hi
I am not sure I understand your statement!!
These MXA`s are genuie Agilent/keysight
N9020A analyzers-These resellers did get many and some
were obviously a mix of mainframe and processor board.If
you look closely at them you find ??they use a license
server¡ªno copy cat !!!.Thats necessary because the
machines id are located in two places¡ªmidplane board and
processor board¡this process are also described in the MXA
service manual!!
Regarding options-I know they can make
specific options¡ªstill no copy cat!!...and at least one
reseller also can calibrate equipment.
Whats EXT ?
Regards
Hardy
?
?
I've got mine few years back. They get
lot of EXT units when upgraded their cell tower base
station test labs to newer and faster equipment. EXT is
essentially MXA hardware with different personality and
additional source hardware for wireless testing. All these
sellers took that additional hardware, modified the ID on
these units to become a standard MXA 9020 and copied
software licenses for these units to work as MXA. Some of
the sellers claim to calibrate them to match 3.6GHz specs
of "real" 9020, but there are no any traceable papers
obviously. So that's what they are. Mine unit works fine,
but I'm not experienced in RF domain, my interests usually
stop at 50 MHz (not GHz!) :-)
If anybody wants some tests, I can probably run them and
post results, but keep in mind that I don't have the usual
RF hardware in my DC/LF lab.
BR,
Illya
xDevs.com
On 04/19/2024 8:59 AM, hardyhansendk via groups.io wrote:
Please
understand the way they do it over there!!
Even
simpler things have similar . multiple outlets- at ?ec
alliexprex.It seems they do not care as we do do.
But I
and several others in Canada-UK-Australia,Denmark have
received good well packaged MXA``?s from---THEM¡.-I have
receive 4!!!
So
bogus?? Your choice.
Hardy
?
?
Yes Carsten the same items are listed
with multiple sellers and understand it looks a bit bogus.
However it looks like mobile phone manufacturers are
getting rid of their old test kit to anyonyone and various
3rd parties are selling them on.
They've probably got 100's if not 1000's of them.
Some seem to have no idea and eventually found a seller
via the .com site rather than the .co.uk site with a
better price and who was willing to communicate, show
pictures of the options etc.
The adverts are poor and cut and pasted and do say 'Brand
new', XP system etc as the sellers dont know what they are
selling.
You may be able to get a $1200 one with all the options if
you look hard enough. I paid a bit more but as a run a
business so it hurts less!!
Will report back when it arrives.
Regards to all
p.s. Oh just to answer the other question re 'Is it any
better than a 8566B'
Yes, very much so as it's way more than a Swept Spec Ani.
?
?
|
Hello?? Illya You misunderstand the point! In some cases they interchange mainframes-front-panel and processor boards!You are that in some cases hostid and serial nr doesn¡¯t matc-they don¡¯t care to fix it-even its possible.Alltest also sell these machines-made a link.Look close..its both an Agilent AND Keysight!!so???
Hardy ? ? Hello Hardy,
EXT is E6607B :
They are obviously legit Agilent/Keysight hardware and components, including software and license server. But MXA you see on all those ebay listings are modified units and they run modified license servers, made to work with any serial number and license key. Dead give away available on the screenshots of the listings, where you see machine HostID S/N and actual S/N of the unit not matching up. Legitimate licenses issued by Keysight always match in S/N. If you look very closely you can also see that all these $1-2k MXAs have aftermarket labels, like the font and logos don't match actual factory made Keysight/Agilent N9020A.
It's also easy to check by running S/N of converted MXA via Keysight support database to see what it comes back to ;)
Now , do they work as real 3.6GHz MXA? Yes, at least I had all the basic functions behave as expected.
But it does not mean they would be supported, serviced or related to Keysight in any official way anymore after such "conversion". :)
toggle quoted message
Show quoted text
On 04/25/2024 1:07 AM, hardyhansendk via groups.io wrote: Hi I am not sure I understand your statement!! These MXA`s are genuie Agilent/keysight N9020A analyzers-These resellers did get many and some were obviously a mix of mainframe and processor board.If you look closely at them you find ??they use a license server¡ªno copy cat !!!.Thats necessary because the machines id are located in two places¡ªmidplane board and processor board¡this process are also described in the MXA service manual!! Regarding options-I know they can make specific options¡ªstill no copy cat!!...and at least one reseller also can calibrate equipment. Whats EXT ? Regards Hardy ? ? I've got mine few years back. They get lot of EXT units when upgraded their cell tower base station test labs to newer and faster equipment. EXT is essentially MXA hardware with different personality and additional source hardware for wireless testing. All these sellers took that additional hardware, modified the ID on these units to become a standard MXA 9020 and copied software licenses for these units to work as MXA. Some of the sellers claim to calibrate them to match 3.6GHz specs of "real" 9020, but there are no any traceable papers obviously. So that's what they are. Mine unit works fine, but I'm not experienced in RF domain, my interests usually stop at 50 MHz (not GHz!) :-)
If anybody wants some tests, I can probably run them and post results, but keep in mind that I don't have the usual RF hardware in my DC/LF lab.
BR,
Illya
xDevs.com
On 04/19/2024 8:59 AM, hardyhansendk via groups.io wrote: Please understand the way they do it over there!! Even simpler things have similar . multiple outlets- at ?ec alliexprex.It seems they do not care as we do do. But I and several others in Canada-UK-Australia,Denmark have received good well packaged MXA``?s from---THEM¡.-I have receive 4!!! So bogus?? Your choice. Hardy ? ? Yes Carsten the same items are listed with multiple sellers and understand it looks a bit bogus.
However it looks like mobile phone manufacturers are getting rid of their old test kit to anyonyone and various 3rd parties are selling them on.
They've probably got 100's if not 1000's of them.
Some seem to have no idea and eventually found a seller via the .com site rather than the .co.uk site with a better price and who was willing to communicate, show pictures of the options etc.
The adverts are poor and cut and pasted and do say 'Brand new', XP system etc as the sellers dont know what they are selling.
You may be able to get a $1200 one with all the options if you look hard enough. I paid a bit more but as a run a business so it hurts less!!
Will report back when it arrives.
Regards to all
p.s. Oh just to answer the other question re 'Is it any better than a 8566B'
Yes, very much so as it's way more than a Swept Spec Ani.
?
?
|
Hello Hardy,
EXT is E6607B :
They are obviously legit Agilent/Keysight hardware and components,
including software and license server. But MXA you see on all
those ebay listings are modified units and they run modified
license servers, made to work with any serial number and license
key. Dead give away available on the screenshots of the listings,
where you see machine HostID S/N and actual S/N of the unit not
matching up. Legitimate licenses issued by Keysight always match
in S/N. If you look very closely you can also see that all these
$1-2k MXAs have aftermarket labels, like the font and logos don't
match actual factory made Keysight/Agilent N9020A.
It's also easy to check by running S/N of converted MXA via
Keysight support database to see what it comes back to ;)
Now , do they work as real 3.6GHz MXA? Yes, at least I had all the
basic functions behave as expected.
But it does not mean they would be supported, serviced or related
to Keysight in any official way anymore after such "conversion".
:)
On 04/25/2024 1:07 AM, hardyhansendk via groups.io wrote:
toggle quoted message
Show quoted text
Hi
I am not sure I understand your statement!!
These MXA`s are genuie Agilent/keysight N9020A
analyzers-These resellers did get many and some were
obviously a mix of mainframe and processor board.If you look
closely at them you find ??they use a license server¡ªno copy
cat !!!.Thats necessary because the machines id are located
in two places¡ªmidplane board and processor board¡this
process are also described in the MXA service manual!!
Regarding options-I know they can make specific
options¡ªstill no copy cat!!...and at least one reseller also
can calibrate equipment.
Whats EXT ?
Regards
Hardy
?
?
I've got mine few years back. They get
lot of EXT units when upgraded their cell tower base station
test labs to newer and faster equipment. EXT is essentially
MXA hardware with different personality and additional
source hardware for wireless testing. All these sellers took
that additional hardware, modified the ID on these units to
become a standard MXA 9020 and copied software licenses for
these units to work as MXA. Some of the sellers claim to
calibrate them to match 3.6GHz specs of "real" 9020, but
there are no any traceable papers obviously. So that's what
they are. Mine unit works fine, but I'm not experienced in
RF domain, my interests usually stop at 50 MHz (not GHz!)
:-)
If anybody wants some tests, I can probably run them and
post results, but keep in mind that I don't have the usual
RF hardware in my DC/LF lab.
BR,
Illya
xDevs.com
On 04/19/2024 8:59 AM, hardyhansendk via groups.io wrote:
Please understand the way they do it over
there!!
Even simpler things have similar . multiple
outlets- at ?ec alliexprex.It seems they do not care as we
do do.
But I and several others in
Canada-UK-Australia,Denmark have received good well
packaged MXA``?s from---THEM¡.-I have receive 4!!!
So bogus?? Your choice.
Hardy
?
?
Yes Carsten the same items are listed
with multiple sellers and understand it looks a bit bogus.
However it looks like mobile phone manufacturers are getting
rid of their old test kit to anyonyone and various 3rd
parties are selling them on.
They've probably got 100's if not 1000's of them.
Some seem to have no idea and eventually found a seller via
the .com site rather than the .co.uk site with a better
price and who was willing to communicate, show pictures of
the options etc.
The adverts are poor and cut and pasted and do say 'Brand
new', XP system etc as the sellers dont know what they are
selling.
You may be able to get a $1200 one with all the options if
you look hard enough. I paid a bit more but as a run a
business so it hurts less!!
Will report back when it arrives.
Regards to all
p.s. Oh just to answer the other question re 'Is it any
better than a 8566B'
Yes, very much so as it's way more than a Swept Spec Ani.
?
|
Hi I am not sure I understand your statement!! These MXA`s are genuie Agilent/keysight N9020A analyzers-These resellers did get many and some were obviously a mix of mainframe and processor board.If you look closely at them you find ??they use a license server¡ªno copy cat !!!.Thats necessary because the machines id are located in two places¡ªmidplane board and processor board¡this process are also described in the MXA service manual!! Regarding options-I know they can make specific options¡ªstill no copy cat!!...and at least one reseller also can calibrate equipment. Whats EXT ? Regards Hardy ? ? I've got mine few years back. They get lot of EXT units when upgraded their cell tower base station test labs to newer and faster equipment. EXT is essentially MXA hardware with different personality and additional source hardware for wireless testing. All these sellers took that additional hardware, modified the ID on these units to become a standard MXA 9020 and copied software licenses for these units to work as MXA. Some of the sellers claim to calibrate them to match 3.6GHz specs of "real" 9020, but there are no any traceable papers obviously. So that's what they are. Mine unit works fine, but I'm not experienced in RF domain, my interests usually stop at 50 MHz (not GHz!) :-)
If anybody wants some tests, I can probably run them and post results, but keep in mind that I don't have the usual RF hardware in my DC/LF lab.
BR,
Illya
xDevs.com
toggle quoted message
Show quoted text
On 04/19/2024 8:59 AM, hardyhansendk via groups.io wrote: Please understand the way they do it over there!! Even simpler things have similar . multiple outlets- at ?ec alliexprex.It seems they do not care as we do do. But I and several others in Canada-UK-Australia,Denmark have received good well packaged MXA``?s from---THEM¡.-I have receive 4!!! So bogus?? Your choice. Hardy ? ? Yes Carsten the same items are listed with multiple sellers and understand it looks a bit bogus.
However it looks like mobile phone manufacturers are getting rid of their old test kit to anyonyone and various 3rd parties are selling them on.
They've probably got 100's if not 1000's of them.
Some seem to have no idea and eventually found a seller via the .com site rather than the .co.uk site with a better price and who was willing to communicate, show pictures of the options etc.
The adverts are poor and cut and pasted and do say 'Brand new', XP system etc as the sellers dont know what they are selling.
You may be able to get a $1200 one with all the options if you look hard enough. I paid a bit more but as a run a business so it hurts less!!
Will report back when it arrives.
Regards to all
p.s. Oh just to answer the other question re 'Is it any better than a 8566B'
Yes, very much so as it's way more than a Swept Spec Ani.
?
|
I've got mine few years back. They get
lot of EXT units when upgraded their cell tower base station test
labs to newer and faster equipment. EXT is essentially MXA
hardware with different personality and additional source hardware
for wireless testing. All these sellers took that additional
hardware, modified the ID on these units to become a standard MXA
9020 and copied software licenses for these units to work as MXA.
Some of the sellers claim to calibrate them to match 3.6GHz specs
of "real" 9020, but there are no any traceable papers obviously.
So that's what they are. Mine unit works fine, but I'm not
experienced in RF domain, my interests usually stop at 50 MHz (not
GHz!) :-)
If anybody wants some tests, I can probably run them and post
results, but keep in mind that I don't have the usual RF hardware
in my DC/LF lab.
BR,
Illya
xDevs.com
On 04/19/2024 8:59 AM, hardyhansendk via groups.io wrote:
toggle quoted message
Show quoted text
Please understand the way they do it over
there!!
Even simpler things have similar . multiple
outlets- at ?ec alliexprex.It seems they do not care as we
do do.
But I and several others in
Canada-UK-Australia,Denmark have received good well packaged
MXA``?s from---THEM¡.-I have receive 4!!!
So bogus?? Your choice.
Hardy
?
?
Yes Carsten the same items are listed with
multiple sellers and understand it looks a bit bogus.
However it looks like mobile phone manufacturers are getting
rid of their old test kit to anyonyone and various 3rd parties
are selling them on.
They've probably got 100's if not 1000's of them.
Some seem to have no idea and eventually found a seller via
the .com site rather than the .co.uk site with a better price
and who was willing to communicate, show pictures of the
options etc.
The adverts are poor and cut and pasted and do say 'Brand
new', XP system etc as the sellers dont know what they are
selling.
You may be able to get a $1200 one with all the options if you
look hard enough. I paid a bit more but as a run a business so
it hurts less!!
Will report back when it arrives.
Regards to all
p.s. Oh just to answer the other question re 'Is it any better
than a 8566B'
Yes, very much so as it's way more than a Swept Spec Ani.
|
Re: HP6643A - Blows Fuse When Activated
What the bulb is doing is limiting the current into the equipment.? All the voltages will be low.
What this is useful for is
1) saving fuses
2) running things at reduced input voltages which, depending on the power supply, may allow you to figure out which supply(s) has/have the shorted capacitor to ground.
Measure ONLY on the output of the supplies and circuitry, DO NOT measure on the directly rectified AC.
Harvey
toggle quoted message
Show quoted text
On 4/24/2024 10:02 PM, Michael Yellin wrote: All, I finally obtained a proper bulb -- turns out, my GF had an unopened package of 2 60 watt incandescent?bulbs. Woo hoo.? Finally got the bulb connected after removing the fuse holder.? HOWEVER, now, as soon as I turn the unit on, the bulb goes full bright, and nothing is displayed on the screen anymore.? Not sure if it is booting up "activated" or what. Definitely not good...worries that the last time it booted something happened and the fuse wasn't fast enough or ....?
Any help is greatly appreciated.
On Sat, Apr 13, 2024 at 5:58?PM Harvey White <madyn@...> wrote:
Appliance bulbs in particular.? Are halogen considered incondescent?
They are.? May not quite work the way you think, but they are.
They're
higher temperature than normal incandescent.? Definitely look for
appliance bulbs.
Harvey
> On Sat, Apr 13, 2024, 5:15?PM Peter Gottlieb
<hpnpilot@...> wrote:
>
>? ? ?They sell them in the local Home Depot, appliance bulbs and
>? ? ?halogens bulbs.
>
>
>? ? ?On 4/13/2024 6:23 PM, Michael Yellin wrote:
>? ? ?> I can't believe how difficult it is to find an incandescent
>? ? ?bulb.? Gotta wait
>? ? ?> to get one from Ebay.
>? ? ?>
>? ? ?> On Mon, Apr 8, 2024, 9:27?PM Michael Yellin via groups.io
<>
>? ? ?<> <>
>? ? ?> <michaelhq54@...> wrote:
>? ? ?>
>? ? ?>? ? ?Will do.? Thanks for the offer, I plan to take you up
on it.
>? ? ?>
>? ? ?>? ? ?On Mon, Apr 8, 2024 at 4:43?PM Peter Gottlieb
>? ? ?<hpnpilot@...> wrote:
>? ? ?>
>? ? ?>? ? ? ? ?Try starting with a 60 Watt incandescent.
>? ? ?>
>? ? ?>? ? ? ? ?If you need help troubleshooting the supply I would be
>? ? ?happy to assist.
>? ? ?>
>? ? ?>? ? ? ? ?Peter
>? ? ?>
>? ? ?>>? ? ? ? ?On Apr 8, 2024, at 7:33?PM, Michael Yellin
>? ? ?<michaelhq54@...> wrote:
>? ? ?>>
>? ? ?>>? ? ? ? ??
>? ? ?>>? ? ? ? ?Peter,
>? ? ?>>
>? ? ?>>? ? ? ? ?This idea "You could wire an incandescent bulb in
place
>? ? ?of the fuse
>? ? ?>>? ? ? ? ?so you don't keep blowing them. Find a wattage that
>? ? ?will allow the
>? ? ?>>? ? ? ? ?supply to boot, but then light
>? ? ?>>? ? ? ? ?up when the short occurs" is very interesting.
How can
>? ? ?I choose the
>? ? ?>>? ? ? ? ?appropriate wattage of light?
>? ? ?>>
>? ? ?>>? ? ? ? ?Thanks,
>? ? ?>>? ? ? ? ?Michael
>? ? ?>>
>? ? ?>>? ? ? ? ?On Sat, Apr 6, 2024 at 7:05?PM Peter Gottlieb
>? ? ?<hpnpilot@...> wrote:
>? ? ?>>
>? ? ?>>? ? ? ? ? ? ?Could be a lot of things.? The manual is
available
>? ? ?on the web.
>? ? ?>>? ? ? ? ? ? ?At quick glance
>? ? ?>>? ? ? ? ? ? ?it seems when the supply is "on" before being
>? ? ?enabled, the main
>? ? ?>>? ? ? ? ? ? ?transformer and
>? ? ?>>? ? ? ? ? ? ?rectifiers are live.? You can verify by measuring
>? ? ?at the main
>? ? ?>>? ? ? ? ? ? ?electrolytics.
>? ? ?>>
>? ? ?>>? ? ? ? ? ? ?My guess is something is wrong with the pass
>? ? ?elements and the
>? ? ?>>? ? ? ? ? ? ?supply crowbars
>? ? ?>>? ? ? ? ? ? ?but doesn't limit current and the fuse takes
over.
>? ? ?You may be
>? ? ?>>? ? ? ? ? ? ?able to max out
>? ? ?>>? ? ? ? ? ? ?the crowbar OVP limit and not blow the fuse but
>? ? ?that won't solve
>? ? ?>>? ? ? ? ? ? ?the problem.
>? ? ?>>
>? ? ?>>? ? ? ? ? ? ?You could wire an incandescent bulb in place
of the
>? ? ?fuse so you
>? ? ?>>? ? ? ? ? ? ?don't keep
>? ? ?>>? ? ? ? ? ? ?blowing them.? Find a wattage that will allow the
>? ? ?supply to boot,
>? ? ?>>? ? ? ? ? ? ?but then light
>? ? ?>>? ? ? ? ? ? ?up when the short occurs.
>? ? ?>>
>? ? ?>>? ? ? ? ? ? ?Peter
>? ? ?>>
>? ? ?>>
>? ? ?>>
>? ? ?>>? ? ? ? ? ? ?On 4/6/2024 9:48 PM, Harvey White wrote:
>? ? ?>>? ? ? ? ? ? ?> if the fuse blows when activated, then
something
>? ? ?downstream of
>? ? ?>>? ? ? ? ? ? ?the fuse, (once
>? ? ?>>? ? ? ? ? ? ?> activated) is likely a short. Assuming that the
>? ? ?high amperage
>? ? ?>>? ? ? ? ? ? ?fuse blows
>? ? ?>>? ? ? ? ? ? ?> roughly as fast as the low amperage fuse (don't
>? ? ?try to measure
>? ? ?>>? ? ? ? ? ? ?it......) then
>? ? ?>>? ? ? ? ? ? ?> you're likely looking at a dead short
downstream
>? ? ?of the fuse.
>? ? ?>>? ? ? ? ? ? ?>
>? ? ?>>? ? ? ? ? ? ?> Harvey
>? ? ?>>? ? ? ? ? ? ?>
>? ? ?>>? ? ? ? ? ? ?> On 4/6/2024 7:18 PM, Michael Yellin wrote:
>? ? ?>>? ? ? ? ? ? ?>> Mates,
>? ? ?>>? ? ? ? ? ? ?>>
>? ? ?>>? ? ? ? ? ? ?>> Recently acquired an HP 6643A.? When the
unit is
>? ? ?plugged in
>? ? ?>>? ? ? ? ? ? ?and turned on, it
>? ? ?>>? ? ? ? ? ? ?>> boots, and seems fine. However, as soon as the
>? ? ?unit is
>? ? ?>>? ? ? ? ? ? ?"activated" to
>? ? ?>>? ? ? ? ? ? ?>> generate voltage and amperage, the glass fuse
>? ? ?blows.? I don't
>? ? ?>>? ? ? ? ? ? ?have an endless
>? ? ?>>? ? ? ? ? ? ?>> supply of fuses, but I have tried some
very low
>? ? ?and very high
>? ? ?>>? ? ? ? ? ? ?voltage and
>? ? ?>>? ? ? ? ? ? ?>> amperage settings, but that made no difference
>? ? ?(I didn't think
>? ? ?>>? ? ? ? ? ? ?it would, but
>? ? ?>>? ? ? ? ? ? ?>> well, it made me feel better to try)
Opened her
>? ? ?up, looked
>? ? ?>>? ? ? ? ? ? ?around, and
>? ? ?>>? ? ? ? ? ? ?>> everything appears fine, no burnt parts, no
>? ? ?bulging caps, no
>? ? ?>>? ? ? ? ? ? ?melted wires,
>? ? ?>>? ? ? ? ? ? ?>> and nothing obviously shorted. Anyone have any
>? ? ?ideas what
>? ? ?>>? ? ? ? ? ? ?could be wrong, or
>? ? ?>>? ? ? ? ? ? ?>> can send me down a path to try and
resurrect the
>? ? ?thing.
>? ? ?>>? ? ? ? ? ? ?>>
>? ? ?>>? ? ? ? ? ? ?>> TIA
>? ? ?>>? ? ? ? ? ? ?>> Michael
>? ? ?>>? ? ? ? ? ? ?>>
>? ? ?>>? ? ? ? ? ? ?>
>? ? ?>>? ? ? ? ? ? ?>
>? ? ?>>? ? ? ? ? ? ?>
>? ? ?>>? ? ? ? ? ? ?>
>? ? ?>>? ? ? ? ? ? ?>
>? ? ?>>? ? ? ? ? ? ?>
>? ? ?>>
>? ? ?>>
>? ? ?>>
>? ? ?>>
>? ? ?>>
>? ? ?>>
>? ? ?>
>
>
>
>
>
>
>
|
Re: HP6643A - Blows Fuse When Activated
All, I finally obtained a proper bulb -- turns out, my GF had an unopened package of 2 60 watt incandescent?bulbs.? Woo hoo.? Finally got the bulb connected after removing the fuse holder.? HOWEVER, now, as soon as I turn the unit on, the bulb goes full bright, and nothing is displayed on the screen anymore.? Not sure if it is booting up "activated" or what.? Definitely not good...worries that the last time it booted something happened and the fuse wasn't fast enough or ....?
Any help is greatly appreciated.??
On Sat, Apr 13, 2024 at 5:58?PM Harvey White < madyn@...> wrote: Appliance bulbs in particular.? Are halogen considered incondescent?
They are.? May not quite work the way you think, but they are. They're
higher temperature than normal incandescent.? Definitely look for
appliance bulbs.
Harvey
> On Sat, Apr 13, 2024, 5:15?PM Peter Gottlieb <hpnpilot@...> wrote:
>
>? ? ?They sell them in the local Home Depot, appliance bulbs and
>? ? ?halogens bulbs.
>
>
>? ? ?On 4/13/2024 6:23 PM, Michael Yellin wrote:
>? ? ?> I can't believe how difficult it is to find an incandescent
>? ? ?bulb.? Gotta wait
>? ? ?> to get one from Ebay.
>? ? ?>
>? ? ?> On Mon, Apr 8, 2024, 9:27?PM Michael Yellin via
>? ? ?<> <>
>? ? ?> <michaelhq54=[email protected]> wrote:
>? ? ?>
>? ? ?>? ? ?Will do.? Thanks for the offer, I plan to take you up on it.
>? ? ?>
>? ? ?>? ? ?On Mon, Apr 8, 2024 at 4:43?PM Peter Gottlieb
>? ? ?<hpnpilot@...> wrote:
>? ? ?>
>? ? ?>? ? ? ? ?Try starting with a 60 Watt incandescent.
>? ? ?>
>? ? ?>? ? ? ? ?If you need help troubleshooting the supply I would be
>? ? ?happy to assist.
>? ? ?>
>? ? ?>? ? ? ? ?Peter
>? ? ?>
>? ? ?>>? ? ? ? ?On Apr 8, 2024, at 7:33?PM, Michael Yellin
>? ? ?<michaelhq54@...> wrote:
>? ? ?>>
>? ? ?>>? ? ? ? ??
>? ? ?>>? ? ? ? ?Peter,
>? ? ?>>
>? ? ?>>? ? ? ? ?This idea "You could wire an incandescent bulb in place
>? ? ?of the fuse
>? ? ?>>? ? ? ? ?so you don't keep blowing them.? Find a wattage that
>? ? ?will allow the
>? ? ?>>? ? ? ? ?supply to boot, but then light
>? ? ?>>? ? ? ? ?up when the short occurs" is very interesting. How can
>? ? ?I choose the
>? ? ?>>? ? ? ? ?appropriate wattage of light?
>? ? ?>>
>? ? ?>>? ? ? ? ?Thanks,
>? ? ?>>? ? ? ? ?Michael
>? ? ?>>
>? ? ?>>? ? ? ? ?On Sat, Apr 6, 2024 at 7:05?PM Peter Gottlieb
>? ? ?<hpnpilot@...> wrote:
>? ? ?>>
>? ? ?>>? ? ? ? ? ? ?Could be a lot of things.? The manual is available
>? ? ?on the web.
>? ? ?>>? ? ? ? ? ? ?At quick glance
>? ? ?>>? ? ? ? ? ? ?it seems when the supply is "on" before being
>? ? ?enabled, the main
>? ? ?>>? ? ? ? ? ? ?transformer and
>? ? ?>>? ? ? ? ? ? ?rectifiers are live.? You can verify by measuring
>? ? ?at the main
>? ? ?>>? ? ? ? ? ? ?electrolytics.
>? ? ?>>
>? ? ?>>? ? ? ? ? ? ?My guess is something is wrong with the pass
>? ? ?elements and the
>? ? ?>>? ? ? ? ? ? ?supply crowbars
>? ? ?>>? ? ? ? ? ? ?but doesn't limit current and the fuse takes over.?
>? ? ?You may be
>? ? ?>>? ? ? ? ? ? ?able to max out
>? ? ?>>? ? ? ? ? ? ?the crowbar OVP limit and not blow the fuse but
>? ? ?that won't solve
>? ? ?>>? ? ? ? ? ? ?the problem.
>? ? ?>>
>? ? ?>>? ? ? ? ? ? ?You could wire an incandescent bulb in place of the
>? ? ?fuse so you
>? ? ?>>? ? ? ? ? ? ?don't keep
>? ? ?>>? ? ? ? ? ? ?blowing them.? Find a wattage that will allow the
>? ? ?supply to boot,
>? ? ?>>? ? ? ? ? ? ?but then light
>? ? ?>>? ? ? ? ? ? ?up when the short occurs.
>? ? ?>>
>? ? ?>>? ? ? ? ? ? ?Peter
>? ? ?>>
>? ? ?>>
>? ? ?>>
>? ? ?>>? ? ? ? ? ? ?On 4/6/2024 9:48 PM, Harvey White wrote:
>? ? ?>>? ? ? ? ? ? ?> if the fuse blows when activated, then something
>? ? ?downstream of
>? ? ?>>? ? ? ? ? ? ?the fuse, (once
>? ? ?>>? ? ? ? ? ? ?> activated) is likely a short. Assuming that the
>? ? ?high amperage
>? ? ?>>? ? ? ? ? ? ?fuse blows
>? ? ?>>? ? ? ? ? ? ?> roughly as fast as the low amperage fuse (don't
>? ? ?try to measure
>? ? ?>>? ? ? ? ? ? ?it......) then
>? ? ?>>? ? ? ? ? ? ?> you're likely looking at a dead short downstream
>? ? ?of the fuse.
>? ? ?>>? ? ? ? ? ? ?>
>? ? ?>>? ? ? ? ? ? ?> Harvey
>? ? ?>>? ? ? ? ? ? ?>
>? ? ?>>? ? ? ? ? ? ?> On 4/6/2024 7:18 PM, Michael Yellin wrote:
>? ? ?>>? ? ? ? ? ? ?>> Mates,
>? ? ?>>? ? ? ? ? ? ?>>
>? ? ?>>? ? ? ? ? ? ?>> Recently acquired an HP 6643A.? When the unit is
>? ? ?plugged in
>? ? ?>>? ? ? ? ? ? ?and turned on, it
>? ? ?>>? ? ? ? ? ? ?>> boots, and seems fine. However, as soon as the
>? ? ?unit is
>? ? ?>>? ? ? ? ? ? ?"activated" to
>? ? ?>>? ? ? ? ? ? ?>> generate voltage and amperage, the glass fuse
>? ? ?blows.? I don't
>? ? ?>>? ? ? ? ? ? ?have an endless
>? ? ?>>? ? ? ? ? ? ?>> supply of fuses, but I have tried some very low
>? ? ?and very high
>? ? ?>>? ? ? ? ? ? ?voltage and
>? ? ?>>? ? ? ? ? ? ?>> amperage settings, but that made no difference
>? ? ?(I didn't think
>? ? ?>>? ? ? ? ? ? ?it would, but
>? ? ?>>? ? ? ? ? ? ?>> well, it made me feel better to try) Opened her
>? ? ?up, looked
>? ? ?>>? ? ? ? ? ? ?around, and
>? ? ?>>? ? ? ? ? ? ?>> everything appears fine, no burnt parts, no
>? ? ?bulging caps, no
>? ? ?>>? ? ? ? ? ? ?melted wires,
>? ? ?>>? ? ? ? ? ? ?>> and nothing obviously shorted. Anyone have any
>? ? ?ideas what
>? ? ?>>? ? ? ? ? ? ?could be wrong, or
>? ? ?>>? ? ? ? ? ? ?>> can send me down a path to try and resurrect the
>? ? ?thing.
>? ? ?>>? ? ? ? ? ? ?>>
>? ? ?>>? ? ? ? ? ? ?>> TIA
>? ? ?>>? ? ? ? ? ? ?>> Michael
>? ? ?>>? ? ? ? ? ? ?>>
>? ? ?>>? ? ? ? ? ? ?>
>? ? ?>>? ? ? ? ? ? ?>
>? ? ?>>? ? ? ? ? ? ?>
>? ? ?>>? ? ? ? ? ? ?>
>? ? ?>>? ? ? ? ? ? ?>
>? ? ?>>? ? ? ? ? ? ?>
>? ? ?>>
>? ? ?>>
>? ? ?>>
>? ? ?>>
>? ? ?>>
>? ? ?>>
>? ? ?>
>
>
>
>
>
>
>
|
Re: Seeking HP 80000 Data Generator (aka 2900A) system software
As an update, the HP80K system boot disk creation went well using Stan's files pointers and an old PC.
The mainframe itself appears to have some power supply issues - it'll run briefly and then lock up with all five cards in, and make it 5-10 minutes with only one card seated. During that run time, self tests pass for the CPU board but others fail.
When all cards are in, after boot when the backplane power supply and the internal jet engine main cooling fan start up, the display dims and the CRT raster contracts considerably, which is why I suspect a power issue.
-Brian
|
Welcome, Leo! I know I've seen your name before; are you on the TekScopes group? That's a nice HPAK gear collection you have. Unfortunately I can't help you with your 54620C. I had a 54504A for a while and currently have a 54120B. All my other scopes (4 at the moment) are Tektronix. I fix want to welcome you to the HPAK group, though. Jim Ford, Laguna Hills, California, USA Sent from my T-Mobile 4G LTE Deviceber
Welcome, Leo!? I know I've seen your name before; are you on the TekScopes group?? That's a nice HPAK gear collection you have.? Unfortunately I can't help you with your 54620C.? I had a 54504A for a while and currently have a 54120B.? All my other scopes (4 at the moment) are Tektronix.? I fix want to welcome you to the HPAK group, though.? ? Jim Ford, Laguna Hills, California, USA?
Sent from my T-Mobile 4G LTE Device
toggle quoted message
Show quoted text
-------- Original message -------- From: Leo Potjewijd <pe1rhx@...> Date: 4/24/24 5:40 AM (GMT-08:00) Subject: [HP-Agilent-Keysight-equipment] new menber
Hi.
I'm new to this group and thought a little introduction is in order.
I am a semi-retired EE, specialized in the design of RFID readers which I have been doing for the past 30+ years.
Not a collector of HP gear per se, but I have aquired the odd bit here and there, most of it has been in storage for the past two or more decades:
HP 3325
HP 3330B with 3570A
HP 141T with 8552A and 8553B sections
HP 3577A
HP 3577A with 35677A
HP 3577B with 35677B
HP 8640B
Agilent 54620C
?
The 54620C is causing me problems: it refuses to start up and only produces a horizontal line on the display.
I looked inside but could not find any obvious defects or smells, or any shorted tantalum caps.
The only thing that stood out just a bit (literally) was the NVRAM module that appears a little bloated.
Photos will be uploaded shortly.
?
Regarding this problem I am left with the following questions:
1) what can cause this behaviour?
2) is there any essential (like calibration) data in that RAM, i.o.w. can I just replace it?
3) if there is essential data there, how do I go about to refres/place that data?
?
It all boils down to the ultimate question: is there hope of restoring it or is it a basket case?
|
Help me understand the 8510C memory boards
Hello,
I have a question related to the 8510C and more specifically related to
the Display Unit 85101C.
I noticed that there are 2 memory cards with the same part number
85101-60238 but they are not the same.
These cards have places for 2 rows of 16 EEPROMs Xicor X28HC256P but
some are soldered and some are empty sockets.
Same part number has 26 EEPROMs soldered and 6 empty sockets and another
card has 24 soldered EEPROMs and 8 empty sockets. EEPROM is the same
type on both cards so practically one card has less memory.
Unfortunately my card is the one with 8 empty sockets.
What is this card used for?
Can I add the extra EEPROMs in the empty sockets?
Do I need to reinstall the firmware of the 8510C?
I plan to run both 8530A and 8510C firmware. I have the PAL ICs for both.
For reference there is a picture attached with both cards.
Thanks,
Razvan
|
Hi Leo,
Welcome to the Group!
Unfortunately, I can't help you with your 'scope problem because I'm not familiar with the HP 54620C.I do remember that we met around 10 years ago at your place where I picked up a Tek 2440 manual set that you offered.
I hope you can revive your 54620C!
Raymond
|
Hi.
I'm new to this group and thought a little introduction is in order.
I am a semi-retired EE, specialized in the design of RFID readers which I have been doing for the past 30+ years.
Not a collector of HP gear per se, but I have aquired the odd bit here and there, most of it has been in storage for the past two or more decades:
HP 3325
HP 3330B with 3570A
HP 141T with 8552A and 8553B sections
HP 3577A
HP 3577A with 35677A
HP 3577B with 35677B
HP 8640B
Agilent 54620C
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The 54620C is causing me problems: it refuses to start up and only produces a horizontal line on the display.
I looked inside but could not find any obvious defects or smells, or any shorted tantalum caps.
The only thing that stood out just a bit (literally) was the NVRAM module that appears a little bloated.
Photos will be uploaded shortly.
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Regarding this problem I am left with the following questions:
1) what can cause this behaviour?
2) is there any essential (like calibration) data in that RAM, i.o.w. can I just replace it?
3) if there is essential data there, how do I go about to refres/place that data?
?
It all boils down to the ultimate question: is there hope of restoring it or is it a basket case?
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David C. Partridge
