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Re: In Defense of the 7A19

 

Hi Geoff,
You are missing the forest for the trees.
Anyone lucky enough to have a woman engineer working for them that understood how to use the triggering capabilities of this scope should be willing to overlook much more than the minor details you pointed out. Women engineers who can use a scope with such advanced triggering capability is something every lab needs more of :)

Dennis Tillman W7pF

-----Original Message-----
From: [email protected] [mailto:[email protected]] On Behalf Of lilacbarn
Sent: Saturday, June 06, 2020 11:24 AM
To: [email protected]
Subject: Re: [TekScopes] In Defense of the 7A19

Hi Ernesto, thanks for that link to the Tek site on triggering fundamentals for the DPO etc series.
The info in there is very valuable.
I notice the photo on thee front is a bad Health and safety example.
If she worked for me in my test lab (of years ago) I would have had a word or two about rolling up her cuffs or buttoning them to prevent her accidentally catching her test circuits and probes with them as she adjusted her instruments!
Geoff.





--
Dennis Tillman W7pF
TekScopes Moderator
Re: Sweep-switching mod for Type CA and 547 ?

 

re trace-switching on the 547, the 1A4 has a 'trace-slaving switch' on the
rear panel.
Tim

On Sat, 6 Jun 2020 at 19:53, Dave Daniel <kc0wjn@...> wrote:

I would also like to see that solution.

DaveD


On 6/6/2020 2:02 PM, um-gs@... wrote:
Hi,
would also be interested in the same solution for an 1A4 plug in in a
547 scope.
Thanks, Gordian



--
This email has been checked for viruses by Avast antivirus software.
Re: Watch for new members who are here under false pretenses

 

Hi Bill,
Requiring me to check a new members first two or three messages makes more work for me that I am hoping I can avoid it for a while longer.

Something like this has only happened twice in the past 18 months.
In both cases I would have spotted it before approving them if I knew what to look for at the time.
The latest one was easy to spot from the reason he gave to join but since it was plausible I let him in. That won't happen again.
Now that I know what to look for and that I need to be more suspicious I will be looking at each membership request much more critically.

Dennis Tillman W7pF

-----Original Message-----
From: [email protected] [mailto:[email protected]] On Behalf Of bill K7WXW
Sent: Saturday, June 06, 2020 10:35 AM
To: [email protected]
Subject: Re: [TekScopes] Watch for new members who are here under false pretenses

This is why all of the groups I manage are set up so that the first two or three new member messages are moderated. On most of them, I also send a message to anyone applying to join, asking them about their interest in the group. People looking for easy ways to post spam almost always move on. For me, the additional work is worth the result: spam free lists.





--
Dennis Tillman W7pF
TekScopes Moderator
Re: In Defense of the 7A19

 

She should be wearing an anti-static lab coat, which would solve the "cuffs-catching-on-things" problem.

DaveD

On 6/6/2020 2:24 PM, lilacbarn wrote:
Hi Ernesto, thanks for that link to the Tek site on triggering fundamentals for the DPO etc series.
The info in there is very valuable.
I notice the photo on thee front is a bad Health and safety example.
If she worked for me in my test lab (of years ago) I would have had a word or two about rolling up her
cuffs or buttoning them to prevent her accidentally catching her test circuits and probes with them
as she adjusted her instruments!
Geoff.

--
This email has been checked for viruses by Avast antivirus software.
Re: Sweep-switching mod for Type CA and 547 ?

 

I would also like to see that solution.

DaveD

On 6/6/2020 2:02 PM, um-gs@... wrote:
Hi,
would also be interested in the same solution for an 1A4 plug in in a 547 scope.
Thanks, Gordian

--
This email has been checked for viruses by Avast antivirus software.
Re: In Defense of the 7A19

 

Hi Ernesto, thanks for that link to the Tek site on triggering fundamentals for the DPO etc series.
The info in there is very valuable.
I notice the photo on thee front is a bad Health and safety example.
If she worked for me in my test lab (of years ago) I would have had a word or two about rolling up her
cuffs or buttoning them to prevent her accidentally catching her test circuits and probes with them
as she adjusted her instruments!
Geoff.
Re: Watch for new members who are here under false pretenses

 

On Sat, Jun 6, 2020 at 10:32 AM, Dennis Tillman W7pF wrote:


Did you forget to include what you wanted me to know?
Dennis
Hi Dennis: I PMed it... nothing that important.
Roy
Re: Sweep-switching mod for Type CA and 547 ?

 

Hi,
would also be interested in the same solution for an 1A4 plug in in a 547 scope.
Thanks, Gordian
Re: Tek 4041 GPIB Controller

 

Tony,

Does your 2465 include the GPIB option connector?

If not - I don't think you can connect that scope to anything externally - controller or printer.

I do see in the 2445/2465 Option 10 GPIB manual - control programs for the Tektronix 4051/4052/4054 and Tektronix 4041 to change settings on the 2465 with Option 10.

But I don't think the 2465 can digitally capture the analog inputs. It looks like the GPIB can only be used for all the front panel settings.

I think you need a DSO in order to capture the inputs in digital form - and those scopes may have printer output capability.

The 4041 thermal printer cannot be used with any other equipment - there is a board inside the 4041 that drives the printer for 20 column text output - not graphics.

The 4041 GPIB Programming Guide has an example of printing the output on a 4025 terminal, or a 4662 plotter, but not on the internal printer.
Re: Watch for new members who are here under false pretenses

 

Thank you for all you do!
Most of us do not know exactly, since only few of us know how much work you
do every day!
Have a great weekend and stay safe all of you out there.
Tony

On Sat, Jun 6, 2020 at 12:34 PM bill K7WXW <K7WXW@...> wrote:

This is why all of the groups I manage are set up so that the first two or
three new member messages are moderated. On most of them, I also send a
message to anyone applying to join, asking them about their interest in the
group. People looking for easy ways to post spam almost always move on.
For me, the additional work is worth the result: spam free lists.
Re: Fixing a Tektronix 2246

 

Thanks for the info! I’ll put that on my list if I ever have a psu issue.
Re: Never to be used GPIB option and power consumption and heat.

 

Thank you very much for explaining it to me!
Somewhere I heard that it was possible, but now it is clear to me, thanks
to you Siggi.
Have a great weekend!
Stay safe all of you.

On Sat, Jun 6, 2020 at 12:35 PM Siggi <siggi@...> wrote:

Hey Tony,

The 2465 is an analog scope, and the GPIB is only good for changing or
reading back the settings on the scope. The scope itself has no idea what's
displayed on the CRT, so you wouldn't be able to e.g. read back the
displayed waveform to a computer.
For that you'd need a digitizing scope of some description.

Siggi

On Sat, Jun 6, 2020 at 12:39 PM Tony Fleming <czecht@...> wrote:

I have this option on my 2465 - 300 MHZ version and I purchased the
cable.
I have plans to get it to work with a computer and I'm looking for
someone
who has done this, so I don't need to reinvent something that is done
already! ha ha ha
Can someone point me to the resources I can use?
Is there some modern PC connection available?
Why would you like to remove it?
It isn't hurting anything and the power supply creates almost the same
heat
as if you didn't have it, so you wouldn't save any $$, I think.

Thank you all!
Stay safe and have a great weekend!
Tony

On Sat, Jun 6, 2020 at 11:24 AM Lawrance A. Schneider <
llaassllaaass@...> wrote:

My 2465BDM has a GPIB option. I'll never use it; all my other
instruments
either have no external connection to the world (my computer) or use
ethernet.

Relative to heat and energy consumption would it be advantageous to
remove
the card?

Thanks, larry
Re: Never to be used GPIB option and power consumption and heat.

 

Hey Tony,

The 2465 is an analog scope, and the GPIB is only good for changing or
reading back the settings on the scope. The scope itself has no idea what's
displayed on the CRT, so you wouldn't be able to e.g. read back the
displayed waveform to a computer.
For that you'd need a digitizing scope of some description.

Siggi

On Sat, Jun 6, 2020 at 12:39 PM Tony Fleming <czecht@...> wrote:

I have this option on my 2465 - 300 MHZ version and I purchased the cable.
I have plans to get it to work with a computer and I'm looking for someone
who has done this, so I don't need to reinvent something that is done
already! ha ha ha
Can someone point me to the resources I can use?
Is there some modern PC connection available?
Why would you like to remove it?
It isn't hurting anything and the power supply creates almost the same heat
as if you didn't have it, so you wouldn't save any $$, I think.

Thank you all!
Stay safe and have a great weekend!
Tony

On Sat, Jun 6, 2020 at 11:24 AM Lawrance A. Schneider <
llaassllaaass@...> wrote:

My 2465BDM has a GPIB option. I'll never use it; all my other
instruments
either have no external connection to the world (my computer) or use
ethernet.

Relative to heat and energy consumption would it be advantageous to
remove
the card?

Thanks, larry
Re: Watch for new members who are here under false pretenses

 

This is why all of the groups I manage are set up so that the first two or three new member messages are moderated. On most of them, I also send a message to anyone applying to join, asking them about their interest in the group. People looking for easy ways to post spam almost always move on. For me, the additional work is worth the result: spam free lists.
Re: Watch for new members who are here under false pretenses

 

Hi Roy,
Did you forget to include what you wanted me to know?
Dennis

-----Original Message-----
From: [email protected] [mailto:[email protected]] On Behalf Of Roy Thistle
Sent: Saturday, June 06, 2020 9:58 AM
To: [email protected]
Subject: Re: [TekScopes] Watch for new members who are here under false pretenses

On Sat, Jun 6, 2020 at 09:56 AM, Dennis Tillman W7pF wrote:


Let me know if anyone in other groups has attempted to do this.




--
Dennis Tillman W7pF
TekScopes Moderator
Re: Tek 4041 GPIB Controller

 

Thank you for your reply.
Is there an external printer I can connect to my 2465?
Thanks.
Tony

On Sat, Jun 6, 2020 at 12:10 PM Monty McGraw <mmcgraw74@...> wrote:

I decided to take a look at why my 4041 thermal printer was printing
unrecognizable characters.

I was able to fix it by removing the timing disk cover and cleaning the
contacts and timing disk with 90% isopropyl alcohol.
I believe the 40 year old grease on the timing disk had hardened and was
keeping the contacts from making proper contact with the timing disk.

You can see description and photos of the repair on my post on vcfed:
Re: In Defense of the 7A19

 

Hi Ernesto,
Thanks for that link to the Triggering Fundamentals Application Note on the Tektronix web site.
I have one disagreement with this AppNote after glancing through it.

This is the most advanced article on triggering I have ever seen.
There is nothing fundamental about the triggering capability of the scopes in this AppNote. I think it will take years to fully understand how all of these trigger conditions interact before you can take advantage of all of this new capability.
A better name for the App Note would be Advanced Triggering not Fundamental Triggering.

Dennis Tillman W7pF

-----Original Message-----
From: [email protected] [mailto:[email protected]] On Behalf Of Ernesto
Sent: Saturday, June 06, 2020 9:24 AM
To: [email protected]
Subject: Re: [TekScopes] In Defense of the 7A19

On Mon, Jun 1, 2020 at 08:21 AM, Dave Daniel wrote:


One of the Tektronix “Concepts” books is “Oscilloscope Trigger
Circuits” by Harold Magee. If you want to learn more about triggering,
that book would be a good resource.

DaveD
Hi Dave,

I found this book you recommended under the "Concept Series" in tekwiki. It is very helpful and easy to read.

Another article, a little more advanced, is on www.tek.com. It goes beyond all one may want to know on the subject, but I will find time to read it.



Ernesto





--
Dennis Tillman W7pF
TekScopes Moderator
Re: Never to be used GPIB option and power consumption and heat.

 

Percentage-wise, the GPIB power is probably no big deal. I don't know how the GPIB option is connected internally, but if it's say, via a ribbon cable, you may be able to just unplug it and secure it so it can't short to anything. Then make sure the system starts up and runs properly without it - it may cause error reports on POST, for instance, if it expects to find it.

If the GPIB module is hard-plugged directly into a port, and requires physical removal to disconnect, then you'll have to worry about plugging the empty cabinet hole, and the possibility of eventually losing the GPIB parts - this tends to happen when things are separated.

The simplest thing is to just leave it be.

Ed
Re: Watch for new members who are here under false pretenses

 

THANK YOU FOR ALL YOU DO!!!

On Sat, Jun 6, 2020 at 11:56 AM Dennis Tillman W7pF <dennis@...>
wrote:

A few days ago I approved someone who wanted to join TekScopes.
Fortunately one of our members alerted me that he recognized the email ID.
The person (or group) using that email ID was joining other groups to post
ads for face masks.
Groups are easy prey for scams like this so this is going to happen again.

Now that I know about this I will be watching for others with the same
intent.
You can help too. Let me know if anyone in other groups has attempted to do
this.
Send me their name or email address via the Group Owner link at the bottom
of this post.

Dennis Tillman W7pF
Re: Tek 4041 GPIB Controller

 

I decided to take a look at why my 4041 thermal printer was printing unrecognizable characters.

I was able to fix it by removing the timing disk cover and cleaning the contacts and timing disk with 90% isopropyl alcohol. I believe the 40 year old grease on the timing disk had hardened and was keeping the contacts from making proper contact with the timing disk.

You can see description and photos of the repair on my post on vcfed:

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