Re: Low cost, OSSW/OSHW AR488 GPIB-USB adapter
It's a standard 24 pin Centronics connector. I bought a bunch of male IDC connectors, but neglected to get any female :-(
For a minimal build you need an Uno or Nano, a piece of ribbon cable and one or more male 24 pin IDC Centronics plugs.
for more details take a look at this thread:
This might also be of interest:
Have Fun!
Reg
|
Re: Testing a 2-01C Diode
With my 410B I routinely measure the output of my TL922 through the HF range at something over 200 V rms but the current through the diode is limited by its load.? The input signal is coupled via a 2 pF capacitor I think which is just the tube fixture.
It's a half wave rectifier and the meter reads the capacitor charge.? So if you don't change the circuit it should be able to be tested.? But recheck the assembly of the probe from the tip to the tube to make sure there is coupling.? And verify that there is a dc path.
Bob
On Saturday, July 27, 2019, 10:37:59 AM PDT, Chuck Harris <cfharris@...> wrote:
Well, it is just a diode.
Take a 9V battery, a resistor as a load, and your DVM,
and try the battery this way, and then that way, and if the
current isn't there in one direction, but is in the other
direction, it is probably good.
The specs are available on the web, so you should be able to
pick your load resistor to match the typical current as specified
in the data sheet.
Or, you could? put it on a curve tracer...
-Chuck
n4buq wrote:
> Still working on the recently-acquired 11036A which isn't working.? I've checked the probe wiring and don't see anything amiss.? When it powers up, the tube gets hot so the heater is evidently working; however, I get no signals back to the meter.
>
> Since I have another probe (this one uses the EA53), I tried that with the meter and it works fine so the problem has to be somewhere in the probe and I'm beginning to wonder if it isn't the tube but am curious as to how that might be considering the heater works (which, I presume, is the primary failure point with these).
>
> Before I go spending money on a rather expensive tube, is there simple way I can test this one out of the probe?? If I supply heater voltage (via an auxiliary power supply), can I place the diode across the signal source and expect to see half-wave rectification?? If I do this, should precautions be made to limit the current through the tube and, if so, how much current is safe?? Unless I'm misreading/misunderstanding the specs, the tube is only rated at 1mA DC which seems quite small but, again, I might be misunderstanding that rating.
>
> BTW, I'm supplying the AC signal with an HP 3310B function generator.
>
> Thanks,
> Barry - N4BUQ
>
>
>
>
>
|
Re: What would you do if you had some test equipment with Serial No: 0000001?
On 7/27/19 2:00 PM, Brian L. Stuart wrote: I have one data point that does provide a little hope. There's a friend
of mine who has done well a few times in the startup game. However,
in his most recent venture, he had a really bad experience with the
VC types who where following the "burn bright and fast to get the
attention of an IPO or and acquisition" philosophy. As expected, it
fell flat. But he was able to get the IP and even the name returned
to him, and has restarted in a smaller form that allows him to focus
on customers the way he always wanted. And he's made it quite
clear that he has no interest in taking VC funding again. So his
customers can count on staying the priority. That's fantastic, he's enlightened. I'm not looking to "get hired", but is he looking for tech people to work with? Alas, the fact that this is remarkable because it's so rare is itself
depressing. Very. -Dave -- Dave McGuire, AK4HZ New Kensington, PA
|
Re: What would you do if you had some test equipment with Serial No: 0000001?
On 7/27/19 1:44 PM, Stephen Hanselman wrote: And we all have to say a special thank you to Carly for the abrupt left turn in HP¡¯s operating philosophy. But she was so highly qualified to run a tech company, with her degree in history! -Dave -- Dave McGuire, AK4HZ New Kensington, PA
|
Re: What would you do if you had some test equipment with Serial No: 0000001?
Left turn? More like a 180.
Peter
toggle quoted message
Show quoted text
On Jul 27, 2019, at 1:44 PM, Stephen Hanselman <kc4sw.io@...> wrote:
And we all have to say a special thank you to Carly for the abrupt left turn in HP¡¯s operating philosophy.
Regards,
Stephen Hanselman
Datagate Systems, LLC
On Jul 27, 2019, at 12:16, Dave McGuire <mcguire@...> wrote:
On 7/27/19 10:33 AM, Peter Gottlieb wrote:
It is my opinion that this short term,
what-can-you-do-for-me-this-quarter mentality is neither good for the
company nor society in general. Positive feedback without control
almost always ends in disaster. About fifteen years ago I had a very interesting, long conversation
with a newly-hired co-worker who happened to have a degree in economics.
I'd been through a few corporate startup/IPO cycles at that point, and
I told him about how I thought this huge shift toward not seeing past
the end of the current quarter dramatically encourages destructive
behavior, as does the whole "end goal" of the IPO...after which a
corporation has but one customer to please and care about: the body of
stockholders. The behaviors encouraged by these attitutes are not
conducive to the long-term survival of the company, and almost always
result in the company screwing over its real customers and being viewed
as "evil" by anyone with a functioning brain.
He essentially nodded and said, "yes, of course." He explained that
this is textbook economics, and people who pursue a degree in economics
are taught this in their first year.
We as a society must stamp out this behavior, but it won't happen
until the whole thing just self-destructs. Some argue that we're seeing
the beginning of that now, and I can't really disagree.
-Dave
--
Dave McGuire, AK4HZ
New Kensington, PA
|
Re: What would you do if you had some test equipment with Serial No: 0000001?
On Saturday, July 27, 2019, 1:17:00 PM EDT, Dave McGuire <mcguire@...> wrote:
> I told him about how I thought this huge shift toward not seeing past
> the end of the current quarter dramatically encourages destructive
> behavior, as does the whole "end goal" of the IPO...after which a
> corporation has but one customer to please and care about: the body of
> stockholders. The behaviors encouraged by these attitutes are not
> conducive to the long-term survival of the company, and almost always
> ...
> We as a society must stamp out this behavior, but it won't happen
> until the whole thing just self-destructs. Some argue that we're seeing
> the beginning of that now, and I can't really disagree.
I have one data point that does provide a little hope. There's a friend
of mine who has done well a few times in the startup game. However,
in his most recent venture, he had a really bad experience with the
VC types who where following the "burn bright and fast to get the
attention of an IPO or and acquisition" philosophy. As expected, it
fell flat. But he was able to get the IP and even the name returned
to him, and has restarted in a smaller form that allows him to focus
on customers the way he always wanted. And he's made it quite
clear that he has no interest in taking VC funding again. So his
customers can count on staying the priority.
Alas, the fact that this is remarkable because it's so rare is itself
depressing.
BLS
|
Re: What would you do if you had some test equipment with Serial No: 0000001?
And we all have to say a special thank you to Carly for the abrupt left turn in HP¡¯s operating philosophy.
Regards,
Stephen Hanselman
Datagate Systems, LLC
toggle quoted message
Show quoted text
On Jul 27, 2019, at 12:16, Dave McGuire <mcguire@...> wrote:
On 7/27/19 10:33 AM, Peter Gottlieb wrote:
It is my opinion that this short term,
what-can-you-do-for-me-this-quarter mentality is neither good for the
company nor society in general. Positive feedback without control
almost always ends in disaster. About fifteen years ago I had a very interesting, long conversation
with a newly-hired co-worker who happened to have a degree in economics.
I'd been through a few corporate startup/IPO cycles at that point, and
I told him about how I thought this huge shift toward not seeing past
the end of the current quarter dramatically encourages destructive
behavior, as does the whole "end goal" of the IPO...after which a
corporation has but one customer to please and care about: the body of
stockholders. The behaviors encouraged by these attitutes are not
conducive to the long-term survival of the company, and almost always
result in the company screwing over its real customers and being viewed
as "evil" by anyone with a functioning brain.
He essentially nodded and said, "yes, of course." He explained that
this is textbook economics, and people who pursue a degree in economics
are taught this in their first year.
We as a society must stamp out this behavior, but it won't happen
until the whole thing just self-destructs. Some argue that we're seeing
the beginning of that now, and I can't really disagree.
-Dave
--
Dave McGuire, AK4HZ
New Kensington, PA
|
Re: Testing a 2-01C Diode
Well, it is just a diode.
Take a 9V battery, a resistor as a load, and your DVM,
and try the battery this way, and then that way, and if the
current isn't there in one direction, but is in the other
direction, it is probably good.
The specs are available on the web, so you should be able to
pick your load resistor to match the typical current as specified
in the data sheet.
Or, you could put it on a curve tracer...
-Chuck
n4buq wrote:
toggle quoted message
Show quoted text
Still working on the recently-acquired 11036A which isn't working. I've checked the probe wiring and don't see anything amiss. When it powers up, the tube gets hot so the heater is evidently working; however, I get no signals back to the meter.
Since I have another probe (this one uses the EA53), I tried that with the meter and it works fine so the problem has to be somewhere in the probe and I'm beginning to wonder if it isn't the tube but am curious as to how that might be considering the heater works (which, I presume, is the primary failure point with these).
Before I go spending money on a rather expensive tube, is there simple way I can test this one out of the probe? If I supply heater voltage (via an auxiliary power supply), can I place the diode across the signal source and expect to see half-wave rectification? If I do this, should precautions be made to limit the current through the tube and, if so, how much current is safe? Unless I'm misreading/misunderstanding the specs, the tube is only rated at 1mA DC which seems quite small but, again, I might be misunderstanding that rating.
BTW, I'm supplying the AC signal with an HP 3310B function generator.
Thanks,
Barry - N4BUQ
|
Re: What would you do if you had some test equipment with Serial No: 0000001?
On 7/27/19 10:33 AM, Peter Gottlieb wrote: It is my opinion that this short term,
what-can-you-do-for-me-this-quarter mentality is neither good for the
company nor society in general.? Positive feedback without control
almost always ends in disaster. About fifteen years ago I had a very interesting, long conversation with a newly-hired co-worker who happened to have a degree in economics. I'd been through a few corporate startup/IPO cycles at that point, and I told him about how I thought this huge shift toward not seeing past the end of the current quarter dramatically encourages destructive behavior, as does the whole "end goal" of the IPO...after which a corporation has but one customer to please and care about: the body of stockholders. The behaviors encouraged by these attitutes are not conducive to the long-term survival of the company, and almost always result in the company screwing over its real customers and being viewed as "evil" by anyone with a functioning brain. He essentially nodded and said, "yes, of course." He explained that this is textbook economics, and people who pursue a degree in economics are taught this in their first year. We as a society must stamp out this behavior, but it won't happen until the whole thing just self-destructs. Some argue that we're seeing the beginning of that now, and I can't really disagree. -Dave -- Dave McGuire, AK4HZ New Kensington, PA
|
Re: What would you do if you had some test equipment with Serial No: 0000001?
Almost exactly what I have in big lithium ion packs, although I don't have them hooked up at the moment.? I don't have a charger which could put out 5 kW of 28.8 volts to recharge them in 4 hours.
Peter
toggle quoted message
Show quoted text
On 7/27/2019 12:39 PM, Pete Manfre wrote: Both.? ?Have 24v @ 1920ah BIG
P
On Sat, Jul 27, 2019, 11:46 AM Peter Gottlieb <hpnpilot@... <mailto:hpnpilot@...>> wrote:
That's respectable for a home system.? Do you have any energy storage, or are
you just doing net metering?
This weekend I'm working on the high level design of a 200 MW energy storage
system which connects at transmission level.? Where it is proposed it should
reduce electric rates by about 20% over the full 20 year contract.
About now is where I wished engineers worked on commission, like everyone in
sales, rather than flat salary.
Peter
On 7/27/2019 11:37 AM, Pete Manfre wrote:
> Talk of power grid solutions¡ this is mine¡.
>
> Pete wa2odo
>
> On Sat, Jul 27, 2019, 11:29 AM Chuck Harris <cfharris@...
<mailto:cfharris@...>
> <mailto:cfharris@... <mailto:cfharris@...>>> wrote:
>
>? ? ?Knowing what I know about your involvement in battery backed up
>? ? ?power grid generation systems; your positive feedback statement,
>? ? ?causes me to have some truly scary visions...
>
>? ? ?-Chuck Harris
>
>? ? ?Peter Gottlieb wrote:
>? ? ?> It is my opinion that this short term,
>? ? ?what-can-you-do-for-me-this-quarter mentality
>? ? ?> is neither good for the company nor society in general. Positive
>? ? ?feedback without
>? ? ?> control almost always ends in disaster.
>? ? ?>
>? ? ?>
>? ? ?> On 7/27/2019 10:07 AM, Oz-in-DFW wrote:
>? ? ?>>
>? ? ?>> There's also the fact that they live under the tyranny of the
financial
>? ? ?quarter and
>? ? ?>> get any long term thinking beat mercilessly out of them.
>? ? ?>>
|
Re: What would you do if you had some test equipment with Serial No: 0000001?
Both.? ?Have 24v @ 1920ah BIG
P
On Sat, Jul 27, 2019, 11:46 AM Peter Gottlieb < hpnpilot@...> wrote: That's respectable for a home system.? Do you have any energy storage, or are
you just doing net metering?
This weekend I'm working on the high level design of a 200 MW energy storage
system which connects at transmission level.? Where it is proposed it should
reduce electric rates by about 20% over the full 20 year contract.
About now is where I wished engineers worked on commission, like everyone in
sales, rather than flat salary.
Peter
On 7/27/2019 11:37 AM, Pete Manfre wrote:
> Talk of power grid solutions¡ this is mine¡.
>
> Pete wa2odo
>
> On Sat, Jul 27, 2019, 11:29 AM Chuck Harris <cfharris@...
> <mailto:cfharris@...>> wrote:
>
>? ? ?Knowing what I know about your involvement in battery backed up
>? ? ?power grid generation systems; your positive feedback statement,
>? ? ?causes me to have some truly scary visions...
>
>? ? ?-Chuck Harris
>
>? ? ?Peter Gottlieb wrote:
>? ? ?> It is my opinion that this short term,
>? ? ?what-can-you-do-for-me-this-quarter mentality
>? ? ?> is neither good for the company nor society in general. Positive
>? ? ?feedback without
>? ? ?> control almost always ends in disaster.
>? ? ?>
>? ? ?>
>? ? ?> On 7/27/2019 10:07 AM, Oz-in-DFW wrote:
>? ? ?>>
>? ? ?>> There's also the fact that they live under the tyranny of the financial
>? ? ?quarter and
>? ? ?>> get any long term thinking beat mercilessly out of them.
>? ? ?>>
|
Still working on the recently-acquired 11036A which isn't working. I've checked the probe wiring and don't see anything amiss. When it powers up, the tube gets hot so the heater is evidently working; however, I get no signals back to the meter.
Since I have another probe (this one uses the EA53), I tried that with the meter and it works fine so the problem has to be somewhere in the probe and I'm beginning to wonder if it isn't the tube but am curious as to how that might be considering the heater works (which, I presume, is the primary failure point with these).
Before I go spending money on a rather expensive tube, is there simple way I can test this one out of the probe? If I supply heater voltage (via an auxiliary power supply), can I place the diode across the signal source and expect to see half-wave rectification? If I do this, should precautions be made to limit the current through the tube and, if so, how much current is safe? Unless I'm misreading/misunderstanding the specs, the tube is only rated at 1mA DC which seems quite small but, again, I might be misunderstanding that rating.
BTW, I'm supplying the AC signal with an HP 3310B function generator.
Thanks,
Barry - N4BUQ
|
Re: What would you do if you had some test equipment with Serial No: 0000001?
That's respectable for a home system.? Do you have any energy storage, or are you just doing net metering?
This weekend I'm working on the high level design of a 200 MW energy storage system which connects at transmission level.? Where it is proposed it should reduce electric rates by about 20% over the full 20 year contract.
About now is where I wished engineers worked on commission, like everyone in sales, rather than flat salary.
Peter
toggle quoted message
Show quoted text
On 7/27/2019 11:37 AM, Pete Manfre wrote: Talk of power grid solutions¡ this is mine¡.
Pete wa2odo
On Sat, Jul 27, 2019, 11:29 AM Chuck Harris <cfharris@... <mailto:cfharris@...>> wrote:
Knowing what I know about your involvement in battery backed up
power grid generation systems; your positive feedback statement,
causes me to have some truly scary visions...
-Chuck Harris
Peter Gottlieb wrote:
> It is my opinion that this short term,
what-can-you-do-for-me-this-quarter mentality
> is neither good for the company nor society in general. Positive
feedback without
> control almost always ends in disaster.
>
>
> On 7/27/2019 10:07 AM, Oz-in-DFW wrote:
>>
>> There's also the fact that they live under the tyranny of the financial
quarter and
>> get any long term thinking beat mercilessly out of them.
>>
|
Re: What would you do if you had some test equipment with Serial No: 0000001?
Talk of power grid solutions¡ this is mine¡.?
Pete wa2odo?
On Sat, Jul 27, 2019, 11:29 AM Chuck Harris < cfharris@...> wrote: Knowing what I know about your involvement in battery backed up
power grid generation systems; your positive feedback statement,
causes me to have some truly scary visions...
-Chuck Harris
Peter Gottlieb wrote:
> It is my opinion that this short term, what-can-you-do-for-me-this-quarter mentality
> is neither good for the company nor society in general.? Positive feedback without
> control almost always ends in disaster.
>
>
> On 7/27/2019 10:07 AM, Oz-in-DFW wrote:
>>
>> There's also the fact that they live under the tyranny of the financial quarter and
>> get any long term thinking beat mercilessly out of them.
>> _._,_._,_
>> --------------------------------------------------------------------------------
>>
|
Re: Low cost, OSSW/OSHW AR488 GPIB-USB adapter
On 7/26/19 12:02 AM, David Platt wrote: The VXI-11 "server" software would need to be written, of course... something to implement the VXI-11 RPCs and multiplex access to the bus via the GPIOs.? As I understand it, it's not terribly difficult to access the Pi GPIOs at fairly high speeds via memory-mapped access, so one should be able to get pretty good throughput without needing an FPGA or dedicated protocol chip. Sounds like a good project to talk about on eevblog. Might find collaborators.
|
Re: What would you do if you had some test equipment with Serial No: 0000001?
Knowing what I know about your involvement in battery backed up
power grid generation systems; your positive feedback statement,
causes me to have some truly scary visions...
-Chuck Harris
Peter Gottlieb wrote:
toggle quoted message
Show quoted text
It is my opinion that this short term, what-can-you-do-for-me-this-quarter mentality
is neither good for the company nor society in general. Positive feedback without
control almost always ends in disaster.
On 7/27/2019 10:07 AM, Oz-in-DFW wrote:
There's also the fact that they live under the tyranny of the financial quarter and
get any long term thinking beat mercilessly out of them.
_._,_._,_
--------------------------------------------------------------------------------
|
Re: What would you do if you had some test equipment with Serial No: 0000001?
There were many many "Bill and Dave" anecdotes to that effect. They were used to inculcate the company ethos when opening new sites and locations.
toggle quoted message
Show quoted text
On 27/07/19 15:33, Peter Gottlieb wrote: It is my opinion that this short term, what-can-you-do-for-me-this-quarter mentality is neither good for the company nor society in general. Positive feedback without control almost always ends in disaster.
On 7/27/2019 10:07 AM, Oz-in-DFW wrote:
There's also the fact that they live under the tyranny of the financial quarter and get any long term thinking beat mercilessly out of them.
_._,_._,_
--------------------------------------------------------------------------------
|
Re: What would you do if you had some test equipment with Serial No: 0000001?
It is my opinion that this short term, what-can-you-do-for-me-this-quarter mentality is neither good for the company nor society in general.? Positive feedback without control almost always ends in disaster.
toggle quoted message
Show quoted text
On 7/27/2019 10:07 AM, Oz-in-DFW wrote:
There's also the fact that they live under the tyranny of the financial quarter and get any long term thinking beat mercilessly out of them.
_._,_._,_
--------------------------------------------------------------------------------
|
Re: What would you do if you had some test equipment with Serial No: 0000001?
Dr. David Kirkby from Kirkby Microwave Ltd
On Fri, 26 Jul 2019 at 13:29, nigel adams via Groups.Io <nigel.adams= [email protected]> wrote: Problem is, and not wishing to sound arrogant in any way...., In their eyes you have had this scope too long and
Tek is expecting you (like Keysight/HP and others) to roll over and buy a new one.
I wonder how they would feel if their shiny new BMW, Mercedes was deemed unrepairable/unserviceable after only 2 years..
Most companies think a lifetime of between 5-10 years is more than enough to keep top end/high tech equipment. ?I was a bit annoyed a few years back. Not sure if it was Agilent or Keysight then, but they had a 4395A Network/Spectrum/Impedance Analyzer for sale on their eBay store. Although obsolete now, at that time it was discontinued, but supported, I was interested in this, but only if they could do the software upgrade so it gave impedance data - one enables this from a floppy disk. Agilent/Keysight said it was sold as it is, and could not be upgraded. I pointed out it will still supported, and said I would feel pretty pissed off if I have bought an instrument one week, the following week it was discontinued, and I could not get an update. They said there's a difference between a week and several years.
I'm not sure how it happened, but at one point I got asked to complete a survey for Keysight and mentioned this experience and I was not happy about it. Keysight (UK) said they could upgrade it, and the cost was a bit over ?700. By this time the instrument had gone from eBay, and I'd not bothered about it. But certainly, I was told initially that it could not have a software upgrade, despite it was still a supported instrument.
There are quite a few times where one part of Keysight says one thing, and another part of Keysight says another. Sometimes you have to argue you case a bit to get what you feel you are entitled to. On other times they have been incredibly generous.
Dave
The use of an embedded PC style OS is a real help to them as the moment M/soft or whoever declares end of support then
the test equipment supplier rubs his hands with glee and can happily refuse to support it.
So many companies now are calling EOS for their equipment as soon as they can.
Not nice when it is hard to justify replacements especially in a teaching or research environment.
What is needed is for the salesmen to be nailed to the floor with written statements that they will support and honour
any stated equipment lifetime such that it makes it really hard for them to sell kit.
That will hurt them (the manufacturers the most) - only then will they consider change or lose a sale to up coming
Instrument makers (eg. Korean or Chinese) gradually their performance is improving and hopefully the more advantageous
pricing will help all of us.
Unfortunately gone are the days of beautifully prepared manuals and information about everything to do with the item from
well known TE companies such are HP, Marconi, Tek etc.
Regards
Nigel
-----Original Message-----
From: [email protected] [mailto:[email protected]] On Behalf Of Susan Parker
Sent: 26 July 2019 12:32
To: [email protected]
Subject: Re: [HP-Agilent-Keysight-equipment] What would you do if you had some test equipment with Serial No: 0000001?
Dear All,
As Alwyn says: "What really annoys me is the lack of support of equipment which uses older versions of Windows- knowing the policies of that company, I now insist on hearing how long term support will be assured before I buy."
Indeed!!!
I have a Tek TDS7000B series in our group that I am trying to "repair"
because its Windows 2000 OS has gone AWOL from a hard drive failure. Tek refuse to supply the Microsoft Windows restore discs "because of licensing issues" which to me seems entity bogus for a piece of equipment that cost well over GBP20,000 in 2003 (i.e. more than a Hi-End VW Golf Turbo).
We have happenchance found an original Restore Manual and set of discs on e$ay which fingers crossed will resolve the issue, but the lack of support from Tek is astounding for such expensive equipment (TDS7154B).
I am now recommanding Pico Technology scopes wherever possible, even though I personally prefer a 'scope with knobs on it the price differentials are to great to ignore.
Best,
Susan.
Susan Parker, Laser Consortium, Department of Physics, Imperial College London, UK.
-- Dr David Kirkby Ph.D C.Eng MIET
Kirkby Microwave Ltd
Registered office: Stokes Hall Lodge, Burnham Rd, Althorne, CHELMSFORD, Essex, CM3 6DT, United Kingdom.
Registered in England and Wales as company number 08914892
Tel 01621-680100 / +44 1621-680100
|
Re: What would you do if you had some test equipment with Serial No: 0000001?
On Thu, Jul 25, 2019 at 12:12 PM, Dave McGuire wrote:
It sounds like Keysight's upper management has forgotten the nature of
the business that they're in, and the nature of their own company.
Suits often forget (or want to erase) where things come from.
More likely they never knew. There's also the fact that they live under the tyranny of the financial quarter and get any long term thinking beat mercilessly out of them.
|
Dave McGuire
