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Re: HP 53310A POST errors

 

My HP 53310A resumed normal by itself when measuring a modulated signal yesterday.
it detected the extended memory and passed POST.
hope same issue won't come back again!
Re: Keypad for 70820A module

 

Sorry guys! The 70820A is a 40GHz MTA (oscilloscope). To do the front panel calibration. You will need 2 ea. phase matched short length 2.4mm cables, the 11667C splitter and 2 ea. 3.5mm-f to 2.4mm-m adapters, and a listed generator. (It is very important that these adapters be identical. You will not pass the phase match self test if they are not the same.)
I had been told in the past it is possible to add a new generator to the list if you can add in all of the required specs and test data into the 70820A ETE Test list. I believe the calibration manual tells you how to do this, but may not list all of the test data required.
Don Bitters
Re: Keypad for 70820A module

 

You bet.

The new group is now live, [email protected]

Bob


On Tue, Apr 16, 2019 at 10:57 PM Dave Miller <ve7hr@...> wrote:
Thanks Bob,
I did not know they are now charging. ? Thanks for transferring the files. ?

Dave
VE7HR?


On Apr 16, 2019, at 7:49 PM, bownes <bownes@...> wrote:

I thought I had done that some time ago, but it appears I did not.

However, transfer of groups from yahoo to , which was free in the past, now requires a $110 fee (you must upgrade to premium for the first year), which, were I to have had to pay for all the groups I've transferred/created, would be over $1k at this point.

So, I'm sad to say I won't cough up the $110, however, I have created a new group, xfered all the files, and as soon as the new group is approved by , you all will be able to subscribe to it at [email protected]. As soon as it is approved, I'll post to the yahoo group and invite all the current members of the yahoo hp_70000 group and post a 'We've Moved' note.

Bob


Bob


On Tue, Apr 16, 2019 at 9:05 PM Dave Miller <ve7hr@...> wrote:
Someone should migrate to to


Dave
VE7HR?


On Apr 16, 2019, at 4:33 PM, Paul Bicknell <paul@...> wrote:

Hi all the HP70000 users are also on this group but when things get specific the HP70000 users group is used

?

From: [email protected] [mailto:[email protected]] On Behalf Of Dave Miller
Sent: 16 April 2019 22:35
To: [email protected]
Subject: Re: [HP-Agilent-Keysight-equipment] Keypad for 70820A module

?

and last activity on the HP70000 users group is December 2015 ;-(

Thanks for the link I have subscribed

Dave

?

On Tue, Apr 16, 2019 at 2:26 PM Ed Breya via Groups.Io <edbreya=[email protected]> wrote:

Paul wrote:
"Hi Ed? are you saying the 70820 will work at? 50 Ghz ?"

No, I couldn't remember what the official spec was, but it was somewhere up there. The point was that you need the higher grade cables and connectors to attain full performance, but lesser ones are OK for lesser needs.

BTW this brings up an interesting question. Just how high can a sampling scope go, and still be considered to "work?" With an analog scope you can spec the 3 dB bandwidth or risetime, and expect it to roll off gradually above, but it's still usable for some things, until too much detail is lost, the amplitude level is too low to interpret, or the triggering craps out. With a sampler, I would expect similar behavior, except that at some point aliasing also starts to show and mess it up even more.

Using a more generous definition of "work," I'd guess that at room temperature environment, the 70820A would be able to show an "acceptable" sine wave display up to 50-60 GHz. It would have to be a sine wave regardless of input wave shape, or it would have to be all aliased-up.

If anyone can readily look at this, it may be interesting to see what happens beyond the specs.

Ed



--

72 de Dave

VE7HR

No virus found in this message.
Checked by AVG -
Version: 2016.0.8048 / Virus Database: 4793/15884 - Release Date: 08/14/18
Internal Virus Database is out of date.
Re: Keypad for 70820A module

 

开云体育

Thanks Bob,
I did not know they are now charging. ? Thanks for transferring the files. ?

Dave
VE7HR?


On Apr 16, 2019, at 7:49 PM, bownes <bownes@...> wrote:

I thought I had done that some time ago, but it appears I did not.

However, transfer of groups from yahoo to , which was free in the past, now requires a $110 fee (you must upgrade to premium for the first year), which, were I to have had to pay for all the groups I've transferred/created, would be over $1k at this point.

So, I'm sad to say I won't cough up the $110, however, I have created a new group, xfered all the files, and as soon as the new group is approved by , you all will be able to subscribe to it at [email protected]. As soon as it is approved, I'll post to the yahoo group and invite all the current members of the yahoo hp_70000 group and post a 'We've Moved' note.

Bob


Bob


On Tue, Apr 16, 2019 at 9:05 PM Dave Miller <ve7hr@...> wrote:
Someone should migrate to to


Dave
VE7HR?


On Apr 16, 2019, at 4:33 PM, Paul Bicknell <paul@...> wrote:

Hi all the HP70000 users are also on this group but when things get specific the HP70000 users group is used

?

From: [email protected] [mailto:[email protected]] On Behalf Of Dave Miller
Sent: 16 April 2019 22:35
To: [email protected]
Subject: Re: [HP-Agilent-Keysight-equipment] Keypad for 70820A module

?

and last activity on the HP70000 users group is December 2015 ;-(

Thanks for the link I have subscribed

Dave

?

On Tue, Apr 16, 2019 at 2:26 PM Ed Breya via Groups.Io <edbreya=[email protected]> wrote:

Paul wrote:
"Hi Ed? are you saying the 70820 will work at? 50 Ghz ?"

No, I couldn't remember what the official spec was, but it was somewhere up there. The point was that you need the higher grade cables and connectors to attain full performance, but lesser ones are OK for lesser needs.

BTW this brings up an interesting question. Just how high can a sampling scope go, and still be considered to "work?" With an analog scope you can spec the 3 dB bandwidth or risetime, and expect it to roll off gradually above, but it's still usable for some things, until too much detail is lost, the amplitude level is too low to interpret, or the triggering craps out. With a sampler, I would expect similar behavior, except that at some point aliasing also starts to show and mess it up even more.

Using a more generous definition of "work," I'd guess that at room temperature environment, the 70820A would be able to show an "acceptable" sine wave display up to 50-60 GHz. It would have to be a sine wave regardless of input wave shape, or it would have to be all aliased-up.

If anyone can readily look at this, it may be interesting to see what happens beyond the specs.

Ed



--

72 de Dave

VE7HR

No virus found in this message.
Checked by AVG -
Version: 2016.0.8048 / Virus Database: 4793/15884 - Release Date: 08/14/18
Internal Virus Database is out of date.
Re: Keypad for 70820A module

 

I thought I had done that some time ago, but it appears I did not.

However, transfer of groups from yahoo to , which was free in the past, now requires a $110 fee (you must upgrade to premium for the first year), which, were I to have had to pay for all the groups I've transferred/created, would be over $1k at this point.

So, I'm sad to say I won't cough up the $110, however, I have created a new group, xfered all the files, and as soon as the new group is approved by , you all will be able to subscribe to it at [email protected]. As soon as it is approved, I'll post to the yahoo group and invite all the current members of the yahoo hp_70000 group and post a 'We've Moved' note.

Bob


Bob


On Tue, Apr 16, 2019 at 9:05 PM Dave Miller <ve7hr@...> wrote:
Someone should migrate to to


Dave
VE7HR?


On Apr 16, 2019, at 4:33 PM, Paul Bicknell <paul@...> wrote:

Hi all the HP70000 users are also on this group but when things get specific the HP70000 users group is used

?

From: [email protected] [mailto:[email protected]] On Behalf Of Dave Miller
Sent: 16 April 2019 22:35
To: [email protected]
Subject: Re: [HP-Agilent-Keysight-equipment] Keypad for 70820A module

?

and last activity on the HP70000 users group is December 2015 ;-(

Thanks for the link I have subscribed

Dave

?

On Tue, Apr 16, 2019 at 2:26 PM Ed Breya via Groups.Io <edbreya=[email protected]> wrote:

Paul wrote:
"Hi Ed? are you saying the 70820 will work at? 50 Ghz ?"

No, I couldn't remember what the official spec was, but it was somewhere up there. The point was that you need the higher grade cables and connectors to attain full performance, but lesser ones are OK for lesser needs.

BTW this brings up an interesting question. Just how high can a sampling scope go, and still be considered to "work?" With an analog scope you can spec the 3 dB bandwidth or risetime, and expect it to roll off gradually above, but it's still usable for some things, until too much detail is lost, the amplitude level is too low to interpret, or the triggering craps out. With a sampler, I would expect similar behavior, except that at some point aliasing also starts to show and mess it up even more.

Using a more generous definition of "work," I'd guess that at room temperature environment, the 70820A would be able to show an "acceptable" sine wave display up to 50-60 GHz. It would have to be a sine wave regardless of input wave shape, or it would have to be all aliased-up.

If anyone can readily look at this, it may be interesting to see what happens beyond the specs.

Ed



--

72 de Dave

VE7HR

No virus found in this message.
Checked by AVG -
Version: 2016.0.8048 / Virus Database: 4793/15884 - Release Date: 08/14/18
Internal Virus Database is out of date.
Re: Keypad for 70820A module

 

开云体育

Someone should migrate to to


Dave
VE7HR?


On Apr 16, 2019, at 4:33 PM, Paul Bicknell <paul@...> wrote:

Hi all the HP70000 users are also on this group but when things get specific the HP70000 users group is used

?

From: [email protected] [mailto:[email protected]] On Behalf Of Dave Miller
Sent: 16 April 2019 22:35
To: [email protected]
Subject: Re: [HP-Agilent-Keysight-equipment] Keypad for 70820A module

?

and last activity on the HP70000 users group is December 2015 ;-(

Thanks for the link I have subscribed

Dave

?

On Tue, Apr 16, 2019 at 2:26 PM Ed Breya via Groups.Io <edbreya=[email protected]> wrote:

Paul wrote:
"Hi Ed? are you saying the 70820 will work at? 50 Ghz ?"

No, I couldn't remember what the official spec was, but it was somewhere up there. The point was that you need the higher grade cables and connectors to attain full performance, but lesser ones are OK for lesser needs.

BTW this brings up an interesting question. Just how high can a sampling scope go, and still be considered to "work?" With an analog scope you can spec the 3 dB bandwidth or risetime, and expect it to roll off gradually above, but it's still usable for some things, until too much detail is lost, the amplitude level is too low to interpret, or the triggering craps out. With a sampler, I would expect similar behavior, except that at some point aliasing also starts to show and mess it up even more.

Using a more generous definition of "work," I'd guess that at room temperature environment, the 70820A would be able to show an "acceptable" sine wave display up to 50-60 GHz. It would have to be a sine wave regardless of input wave shape, or it would have to be all aliased-up.

If anyone can readily look at this, it may be interesting to see what happens beyond the specs.

Ed



--

72 de Dave

VE7HR

No virus found in this message.
Checked by AVG -
Version: 2016.0.8048 / Virus Database: 4793/15884 - Release Date: 08/14/18
Internal Virus Database is out of date.
Re: Keypad for 70820A module

 

开云体育

Hi all the HP70000 users are also on this group but when things get specific the HP70000 users group is used

?

From: [email protected] [mailto:[email protected]] On Behalf Of Dave Miller
Sent: 16 April 2019 22:35
To: [email protected]
Subject: Re: [HP-Agilent-Keysight-equipment] Keypad for 70820A module

?

and last activity on the HP70000 users group is December 2015 ;-(

Thanks for the link I have subscribed

Dave

?

On Tue, Apr 16, 2019 at 2:26 PM Ed Breya via Groups.Io <edbreya=[email protected]> wrote:

Paul wrote:
"Hi Ed? are you saying the 70820 will work at? 50 Ghz ?"

No, I couldn't remember what the official spec was, but it was somewhere up there. The point was that you need the higher grade cables and connectors to attain full performance, but lesser ones are OK for lesser needs.

BTW this brings up an interesting question. Just how high can a sampling scope go, and still be considered to "work?" With an analog scope you can spec the 3 dB bandwidth or risetime, and expect it to roll off gradually above, but it's still usable for some things, until too much detail is lost, the amplitude level is too low to interpret, or the triggering craps out. With a sampler, I would expect similar behavior, except that at some point aliasing also starts to show and mess it up even more.

Using a more generous definition of "work," I'd guess that at room temperature environment, the 70820A would be able to show an "acceptable" sine wave display up to 50-60 GHz. It would have to be a sine wave regardless of input wave shape, or it would have to be all aliased-up.

If anyone can readily look at this, it may be interesting to see what happens beyond the specs.

Ed



--

72 de Dave

VE7HR

No virus found in this message.
Checked by AVG -
Version: 2016.0.8048 / Virus Database: 4793/15884 - Release Date: 08/14/18
Internal Virus Database is out of date.
Re: Keypad for 70820A module

 

They haven't moved to groups.io?

On 17/04/19 8:40 AM, Paul Bicknell wrote:
Hi Dave the other? group is
hp_70000@...
Re: Keypad for 70820A module

 

and last activity on the HP70000 users group is December 2015 ;-(
Thanks for the link I have subscribed
Dave


On Tue, Apr 16, 2019 at 2:26 PM Ed Breya via Groups.Io <edbreya=[email protected]> wrote:
Paul wrote:
"Hi Ed? are you saying the 70820 will work at? 50 Ghz ?"

No, I couldn't remember what the official spec was, but it was somewhere up there. The point was that you need the higher grade cables and connectors to attain full performance, but lesser ones are OK for lesser needs.

BTW this brings up an interesting question. Just how high can a sampling scope go, and still be considered to "work?" With an analog scope you can spec the 3 dB bandwidth or risetime, and expect it to roll off gradually above, but it's still usable for some things, until too much detail is lost, the amplitude level is too low to interpret, or the triggering craps out. With a sampler, I would expect similar behavior, except that at some point aliasing also starts to show and mess it up even more.

Using a more generous definition of "work," I'd guess that at room temperature environment, the 70820A would be able to show an "acceptable" sine wave display up to 50-60 GHz. It would have to be a sine wave regardless of input wave shape, or it would have to be all aliased-up.

If anyone can readily look at this, it may be interesting to see what happens beyond the specs.

Ed



--
72 de Dave
VE7HR
Re: Keypad for 70820A module

 

Paul wrote:
"Hi Ed? are you saying the 70820 will work at? 50 Ghz ?"

No, I couldn't remember what the official spec was, but it was somewhere up there. The point was that you need the higher grade cables and connectors to attain full performance, but lesser ones are OK for lesser needs.

BTW this brings up an interesting question. Just how high can a sampling scope go, and still be considered to "work?" With an analog scope you can spec the 3 dB bandwidth or risetime, and expect it to roll off gradually above, but it's still usable for some things, until too much detail is lost, the amplitude level is too low to interpret, or the triggering craps out. With a sampler, I would expect similar behavior, except that at some point aliasing also starts to show and mess it up even more.

Using a more generous definition of "work," I'd guess that at room temperature environment, the 70820A would be able to show an "acceptable" sine wave display up to 50-60 GHz. It would have to be a sine wave regardless of input wave shape, or it would have to be all aliased-up.

If anyone can readily look at this, it may be interesting to see what happens beyond the specs.

Ed
Re: Keypad for 70820A module

 

Hi Dave All OK with Me for you to point out any mistakes just a typo but
glad you corrected it for me

Hence me stating the difference between a keypad and a key board
I don not want another range war as people got very upset the last time and
we nearly had blood spilt best just move on

-----Original Message-----
From: [email protected]
[mailto:[email protected]] On Behalf Of Dave McGuire
Sent: 16 April 2019 21:59
To: [email protected]
Subject: Re: [HP-Agilent-Keysight-equipment] Keypad for 70820A module


Not trying to nitpick, I just didn't want someone to start searching for
the wrong thing.

-Dave

On April 16, 2019 4:44:37 PM "Paul Bicknell" <paul@...> wrote:

Hi all Dave is correct a typo by me should be HP HIL


-----Original Message-----
From: [email protected]
[mailto:[email protected]] On Behalf Of Dave McGuire
Sent: 16 April 2019 21:37
To: [email protected]
Subject: Re: [HP-Agilent-Keysight-equipment] Keypad for 70820A module

On April 16, 2019 4:34:23 PM "Paul Bicknell" <paul@...>
wrote:
I think there are about 10 of us that are after the key pad for the
70820


The keyboard is a different thing and we have hade grate
misunderstandings
in the past the keyboard for the 70000 system is a PC type keyboard
with
a HP-HPIL connector on it and goes into the HP-HPIL socket on the 70004
HP-HIL, not HP-HPIL. HP Human Interface Loop. (for those searching)

-Dave

--
Dave McGuire, AK4HZ
New Kensington, PA





--
Dave McGuire, AK4HZ
New Kensington, PA








-----
No virus found in this message.
Checked by AVG - www.avg.com
Version: 2016.0.8048 / Virus Database: 4793/15884 - Release Date: 08/14/18
Internal Virus Database is out of date.
Re: Keypad for 70820A module

 

Not trying to nitpick, I just didn't want someone to start searching for the wrong thing.

-Dave

On April 16, 2019 4:44:37 PM "Paul Bicknell" <paul@...> wrote:

Hi all Dave is correct a typo by me should be HP HIL


-----Original Message-----
From: [email protected]
[mailto:[email protected]] On Behalf Of Dave McGuire
Sent: 16 April 2019 21:37
To: [email protected]
Subject: Re: [HP-Agilent-Keysight-equipment] Keypad for 70820A module

On April 16, 2019 4:34:23 PM "Paul Bicknell" <paul@...> wrote:
I think there are about 10 of us that are after the key pad for the 70820


The keyboard is a different thing and we have hade grate misunderstandings
in the past the keyboard for the 70000 system is a PC type keyboard
with
a HP-HPIL connector on it and goes into the HP-HPIL socket on the 70004
HP-HIL, not HP-HPIL. HP Human Interface Loop. (for those searching)

-Dave

--
Dave McGuire, AK4HZ
New Kensington, PA





--
Dave McGuire, AK4HZ
New Kensington, PA
Re: Wanted: HP 10509A Loop Antenna, part of HP 117A VLF Comparator

 

Hi Dan:

The antenna is not tuned and I expect would work over a wide band.
PS there are two versions of the antenna, one uses a couple of 13CW4 Nuvistors and the other uses FETs.


--
Have Fun,

Brooke Clarke


axioms:
1. The extent to which you can fix or improve something will be limited by how well you understand how it works.
2. Everybody, with no exceptions, holds false beliefs.
Re: Keypad for 70820A module

 

Hi all Dave is correct a typo by me should be HP HIL

-----Original Message-----
From: [email protected]
[mailto:[email protected]] On Behalf Of Dave McGuire
Sent: 16 April 2019 21:37
To: [email protected]
Subject: Re: [HP-Agilent-Keysight-equipment] Keypad for 70820A module

On April 16, 2019 4:34:23 PM "Paul Bicknell" <paul@...> wrote:
I think there are about 10 of us that are after the key pad for the 70820


The keyboard is a different thing and we have hade grate misunderstandings
in the past the keyboard for the 70000 system is a PC type keyboard
with
a HP-HPIL connector on it and goes into the HP-HPIL socket on the 70004
HP-HIL, not HP-HPIL. HP Human Interface Loop. (for those searching)

-Dave

--
Dave McGuire, AK4HZ
New Kensington, PA
Re: Keypad for 70820A module

 

开云体育

Hi Dave the other? group is

?

hp_70000@...

?

From: [email protected] [mailto:[email protected]] On Behalf Of Dave Miller
Sent: 16 April 2019 13:40
To: [email protected]
Subject: Re: [HP-Agilent-Keysight-equipment] Keypad for 70820A module

?

Hi Paul,

Where do I find this users group?

?

Mine has the adapters. ?:-)

?

I have a a few pieces of the MMS system that I use on a regular basic. And almost enough for another basic low frequency setup. ?:-). ?

?

As for signal generators I have a 8672A which happens to be on the list. ?

?

So life is good. ?

?

Thanks for the information Paul?

?

Dave

?

?


On Apr 16, 2019, at 12:56 AM, Paul Bicknell <paul@...> wrote:

Hi Dave

?

Welcome aboard to the HP 70000? users? ??there is a 70000 user group

Firstly you will require 2 adapters as the input connectors are 2.4 and are not comparable with

Possibly your standard connectors ( noting? SMA / 3.4 / 2.9 MM connectors are all interchangeable )

?

I also have a 70820? and I am currently looking for a mating RF signal generator to work with it

A list of the mating sig generators are in one of the menus on the 70820

?

Best of luck Paul

From: [email protected] [mailto:[email protected]] On Behalf Of Dave Miller
Sent: 16 April 2019 05:01
To: [email protected]
Subject: [HP-Agilent-Keysight-equipment] Keypad for 70820A module

?

If anyone has a keypad that goes with a HP 70820A module I am interested in obtaining one. ?Picked up a 70004A mainframe with a 70820A module but the keypad is for another module. ?
Mute good news as the module passes self test. ?Now I just have to figure out how to use the microwave transition analyzer does but it look interesting. ?
Thanks?
Dave VE7HR?

No virus found in this message.
Checked by AVG -
Version: 2016.0.8048 / Virus Database: 4793/15884 - Release Date: 08/14/18
Internal Virus Database is out of date.

No virus found in this message.
Checked by AVG -
Version: 2016.0.8048 / Virus Database: 4793/15884 - Release Date: 08/14/18
Internal Virus Database is out of date.
Re: Keypad for 70820A module

 

On April 16, 2019 4:34:23 PM "Paul Bicknell" <paul@...> wrote:
I think there are about 10 of us that are after the key pad for the 70820


The keyboard is a different thing and we have hade grate misunderstandings
in the past the keyboard for the 70000 system is a PC type keyboard with
a HP-HPIL connector on it and goes into the HP-HPIL socket on the 70004
HP-HIL, not HP-HPIL. HP Human Interface Loop. (for those searching)

-Dave

--
Dave McGuire, AK4HZ
New Kensington, PA
Re: Keypad for 70820A module

 

开云体育

Hi Dave

?

I think there are about? 10 of us that are after the key pad for the 70820

?

The keyboard is a different thing and we have hade grate misunderstandings in the past? the keyboard for the? 70000 system is a? PC type keyboard with a HP-HPIL connector on it and goes into the HP-HPIL socket on the 70004

?

Paul B

?

From: [email protected] [mailto:[email protected]] On Behalf Of Dave Miller
Sent: 16 April 2019 18:44
To: [email protected]
Subject: Re: [HP-Agilent-Keysight-equipment] Keypad for 70820A module

?

Thanks Dave,

Yes I am aware that you don't need the keyboard to control things with out but it seems easier to do.

And I like to find all the bits is possible.

?

I will try out the keyboard that I have. There are so few details on the.

Thanks everyone for the answers

?

Dave

VE7HR

Surrey BC

?

?

On Tue, Apr 16, 2019 at 10:35 AM Dave McGuire <mcguire@...> wrote:

On 4/16/19 1:31 PM, Ed Breya via Groups.Io wrote:
> I have the same rig, more or less - it didn't have the keypad. I think
> you can do without it and control everything from the screen menus,
> while the keypad allows for shortcuts to the basic functions, or to
> operate it with various programs - or maybe not. Anyway, as I recall, I
> could run it just fine.

? This is correct; you don't need the module-specific keypad to do
anything on any 70K series instrument.

? I have a bunch of 70K stuff running from one display, and I just have
the blank keypad.? Works fine.

> I think the keypads for the various uses are all the same inside, with
> the difference being the button labels. I later acquired a keypad for a
> different type unit, but have not tried it to see what happens. I think
> you could probably use the one you have, and just figure out what the
> button functions should be.

? Some of the keypad inserts use double-width buttons I think, but all
they are are plungers that press the key mechanisms underneath.

? ? ? ? ? ? ? ? ?-Dave

--
Dave McGuire, AK4HZ
New Kensington, PA




--

72 de Dave

VE7HR

No virus found in this message.
Checked by AVG -
Version: 2016.0.8048 / Virus Database: 4793/15884 - Release Date: 08/14/18
Internal Virus Database is out of date.
Re: Keypad for 70820A module

 

开云体育

Hi Ed? are you saying the 70820 will work at? 50 Ghz ?

?

From: [email protected] [mailto:[email protected]] On Behalf Of Ed Breya via Groups.Io
Sent: 16 April 2019 18:32
To: [email protected]
Subject: Re: [HP-Agilent-Keysight-equipment] Keypad for 70820A module

?

I have the same rig, more or less - it didn't have the keypad. I think you can do without it and control everything from the screen menus, while the keypad allows for shortcuts to the basic functions, or to operate it with various programs - or maybe not. Anyway, as I recall, I could run it just fine.

I think the keypads for the various uses are all the same inside, with the difference being the button labels. I later acquired a keypad for a different type unit, but have not tried it to see what happens. I think you could probably use the one you have, and just figure out what the button functions should be.

Unless you're going to need its full 40-50 GHz capability, it's best to just adapt the inputs to SMA-compatible types. I bought some short (12") cable type adapters, which were much cheaper than the ideal, simple straight-through barrel types. I made a little box that mounts onto the input connectors, with the cables inside, and SMAs on the right side, to make it less obtrusive in the front.

Ed

No virus found in this message.
Checked by AVG -
Version: 2016.0.8048 / Virus Database: 4793/15884 - Release Date: 08/14/18
Internal Virus Database is out of date.
HP 3330B Logic boards

 

开云体育

I’ve acquired a nice HP 3330B Automatic Synthesizer after some testing it started up with a wrong value on the amplitude display.

Some testing revealed some other quirks when I want to alter the frequency it displays the input on the amplitude display and changing the frequency and amplitude with the up down keys also gives strange results on the display, also some other keys don’t work as they should.

After some searching, I’m convinced something is wrong in one of the processor boards. I’ve looked with the logic analyzer and can see the logic is starting up as it should it follows the state diagrams in the same order as in the service manual.
I’ve tested measured a lot and can’t find the fault at the moment, so I’m looking for a working set of logic board (A7 ALU board and A8 control board) and if some body have them an image of the control roms (4 x 256bit ROMS) so I can check these against the images I’ve made of my ROM’s (82S126 compatible).

If someone has a set of boards ?(A8, HP 03330-66575 and A7, HP 03330-66507) and/or the rom images, that would be very nice and should make me possible to fix the 3330B so I can use it in conjunction with the HP3570A to restore a HP 3041A VNA.

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-Rik

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Re: My $25 "In Poor Shape" 3468A has arrived

 

Hi George,

While I write this I am letting the DVM run for about 30 minutes prior to doing the Zero cal procedures, as recommended in the manual. Since you did not mention this not sure it is only needed if further range calibrations would be done, but I assume it won't hurt. I am also running a bit the A/C as today's temp is already at 28 C, so to bring it down a bit more towards my usual environmental room temp of 26-27C as I would guess would make sense to perform the cal around these temps. In the summer (in a few months) the house can get up to 30C with out the A/C running.

Since you pointed out earlier in this thread that one cannot calibrate the DVM to both 2W and 4W ohms due to lack of storage space for the constants, I figured I Zero calibrate the 3468 for 4W, and the 3478 for 2W, so I have one of each calibrated measurement modes. For a general check I have a couple of low ohm precision Dale resistors (btw 0.05-1%) resistors for a general check of the lower ranges, and also build a small resistance standard box from 10-ohm to 10M by using a Caddock 0.05% resistor network a 1-2 extra resistors which I ordered from Mouse some time ago. But so far never had a chance to characterize them on a well calibrated meter, so they are just good as a general reference and possibly to detect calibration drift on the meter over time. But then obviously the resistors will of course also drift some over time. Anyway, will use your red devil resistors to check the higher 30K and 300K ranges.

OK 30 minutes warmup time are up, temp now at 26.5C.

Pushed in both your jumpers and wrapped around them tightly a shorting wire at about the same position on both jumpers to hopefully force the same potential. Letting them temperature stabilize a few minutes, although I only touched them by the tape you put on them.

On 4W the 3468 is still measuring -000.093-94 so pretty close to what it was before. After the cal sequence display reported "Zero Done" and reading is now all zeros, no more negative sign, although I am still in call mode. Will do the same for all the other resistance ranges as well.

Went out of cal mode, and now reading in 4W with both jumpers in, and bridged together still reads 000.000. If I go to 2W I get a reading of 000.059 ohm. I guess this small error is to be expected as the calibration was performed on 4W.

Now your Red Devil resistors. At first I pushed their leads directly into the input jacks of the DVM, but then realized I was heating them up while holding them in my fingers. So then secured them onto a dual banana plug by tightening down the holding screws and plugging the whole thing into the input jacks without having to touch the resistors.

In 2W mode the 20K resistor measured 19.9661K, same reading in 4W mode (your measurement being 19.97140K).
The 98.975K resistor measured 98.980K, and on 4W 98.978K (your reading was 99.00352K).

Looks like I could use a bit of fine calibration, or the temperature difference between your readings (22.0C) might be playing a part.
In any case would it be possible to use your two resistors to at least get the 30K and 300K ranges more closely calibrated?

Thanks.
Alex
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