Date   
Re: Stuck Plug-in with broken handle

John Kolb
 

You can look in the Operator manuals at the mechanical drawing and mechanical parts for different scopes and plugins and see if any numbers match.

John

On 3/31/2019 8:23 PM, Harvey White wrote:
On Sun, 31 Mar 2019 17:56:26 -0700, you wrote:
I have replacements for the TM5000 series, the ones that come in about
3 pieces.
Don't know if they'll fit. I'll see if I can find out what's on my
500 series scope plugins.
They're 3D printed, though.
Harvey

Re: Stuck Plug-in with broken handle

nonIonizing EMF
 

On Sun, Mar 31, 2019 at 08:23 PM, Harvey White wrote:


They're 3D printed, though.
Is it just me, or is searching through the Photos and Files not working correctly on the groups.io site?

I was wondering what was available for 3D printed parts. I see on Thingverse ( https://www.thingiverse.com/tag:Tektronix ) and Yeggi ( https://www.thingiverse.com/tag:Tektronix ) some 3D printed parts... though more on the groups.io site just scrolling through the posts. The search isn't working so well.

A Google search using the following syntax is more effective however: tektronix 3D printed site:https://groups.io/g/TekScopes/

Question Regarding XY Mode

n4buq
 

I have, among other models, a 2465B and I have what I assume to is a rather basic question regarding XY mode.

Placing the scope in XY mode and with an AC signal on CH1, with no other channels set to display, I get a display pattern that appears to have both X and Y components (e.g. a 45-degree moving beam). Without a signal on a vertical input, I would have assumed that CH1's voltage would affect only the X and without any vertical input, the beam would move only horizontally but apparently that's not the case.

XY mode does work as I'd expect with signals on, say, CH1 and CH2, but with only one signal on CH1, I didn't expect to see a vertical component. Is there something about that setup that causes the scope to assume a vertical value that's, maybe, equivalent to the horizontal component when no vertical signal is supplied?

If this is outlined somewhere in the manuals, then I apologize in advance and maybe someone can point me to that. From what I've found, though, XY mode seems to be covered pretty lightly in the manuals I have.

Thanks,
Barry - N4BUQ

Re: Question Regarding XY Mode

Siggi
 

Hey Barry,

IIRC, CH1 provides the X deflection in XY mode. You can then display any or
all of the e input channels under that X deflection, including CH1. This is
a little confusing, as you'll simply produce a diagonal line on the screen
(modulo X deflection bandwidth constraints).

There has surely been discussion of this before on the forum, see e.g.
https://groups.io/g/TekScopes/message/61714.

Siggi

On Mon, Apr 1, 2019 at 9:14 AM n4buq <n4buq@...> wrote:

I have, among other models, a 2465B and I have what I assume to is a
rather basic question regarding XY mode.

Placing the scope in XY mode and with an AC signal on CH1, with no other
channels set to display, I get a display pattern that appears to have both
X and Y components (e.g. a 45-degree moving beam). Without a signal on a
vertical input, I would have assumed that CH1's voltage would affect only
the X and without any vertical input, the beam would move only horizontally
but apparently that's not the case.

XY mode does work as I'd expect with signals on, say, CH1 and CH2, but
with only one signal on CH1, I didn't expect to see a vertical component.
Is there something about that setup that causes the scope to assume a
vertical value that's, maybe, equivalent to the horizontal component when
no vertical signal is supplied?

If this is outlined somewhere in the manuals, then I apologize in advance
and maybe someone can point me to that. From what I've found, though, XY
mode seems to be covered pretty lightly in the manuals I have.

Thanks,
Barry - N4BUQ




SG502 frequency dial question

Tim Phillips
 

From Tim P (UK)

Re the SG502 - should the fine frequency dial / knob just go round and
round with no end stops? (It isn't the reduction drive slipping, I
checked). It seems to work OK.
Thanks
Tim

Re: Question Regarding XY Mode

n4buq
 

Hi Siggi,

Okay - I read through that and it appears that I'm seeing the same results as others. Turning off CH1 will then allow the signal at CH1 to move the beam strictly horizontally (at least it does on my 2445 and I presume it will on the 2465B as well). Not sure I see that in the manuals though...

Thanks,
Barry - N4BUQ

----- Original Message -----
From: "Siggi" <siggi@...>
To: TekScopes@groups.io
Sent: Monday, April 1, 2019 8:35:14 AM
Subject: Re: [TekScopes] Question Regarding XY Mode

Hey Barry,

IIRC, CH1 provides the X deflection in XY mode. You can then display any or
all of the e input channels under that X deflection, including CH1. This is
a little confusing, as you'll simply produce a diagonal line on the screen
(modulo X deflection bandwidth constraints).

There has surely been discussion of this before on the forum, see e.g.
https://groups.io/g/TekScopes/message/61714.

Siggi

On Mon, Apr 1, 2019 at 9:14 AM n4buq <n4buq@...> wrote:

I have, among other models, a 2465B and I have what I assume to is a
rather basic question regarding XY mode.

Placing the scope in XY mode and with an AC signal on CH1, with no other
channels set to display, I get a display pattern that appears to have both
X and Y components (e.g. a 45-degree moving beam). Without a signal on a
vertical input, I would have assumed that CH1's voltage would affect only
the X and without any vertical input, the beam would move only horizontally
but apparently that's not the case.

XY mode does work as I'd expect with signals on, say, CH1 and CH2, but
with only one signal on CH1, I didn't expect to see a vertical component.
Is there something about that setup that causes the scope to assume a
vertical value that's, maybe, equivalent to the horizontal component when
no vertical signal is supplied?

If this is outlined somewhere in the manuals, then I apologize in advance
and maybe someone can point me to that. From what I've found, though, XY
mode seems to be covered pretty lightly in the manuals I have.

Thanks,
Barry - N4BUQ






Re: Question Regarding XY Mode

n4buq
 

Hi Siggi,

Okay - I read through that and it appears that I'm seeing the same results as others. Turning off CH1 will then allow the signal at CH1 to move the beam strictly horizontally (at least it does on my 2445 and I presume it will on the 2465B as well). Not sure I see that in the manuals though...

Thanks,
Barry - N4BUQ

----- Original Message -----
From: "Siggi" <siggi@...>
To: TekScopes@groups.io
Sent: Monday, April 1, 2019 8:35:14 AM
Subject: Re: [TekScopes] Question Regarding XY Mode

Hey Barry,

IIRC, CH1 provides the X deflection in XY mode. You can then display any or
all of the e input channels under that X deflection, including CH1. This is
a little confusing, as you'll simply produce a diagonal line on the screen
(modulo X deflection bandwidth constraints).

There has surely been discussion of this before on the forum, see e.g.
https://groups.io/g/TekScopes/message/61714.

Siggi

On Mon, Apr 1, 2019 at 9:14 AM n4buq <n4buq@...> wrote:

I have, among other models, a 2465B and I have what I assume to is a
rather basic question regarding XY mode.

Placing the scope in XY mode and with an AC signal on CH1, with no other
channels set to display, I get a display pattern that appears to have both
X and Y components (e.g. a 45-degree moving beam). Without a signal on a
vertical input, I would have assumed that CH1's voltage would affect only
the X and without any vertical input, the beam would move only horizontally
but apparently that's not the case.

XY mode does work as I'd expect with signals on, say, CH1 and CH2, but
with only one signal on CH1, I didn't expect to see a vertical component.
Is there something about that setup that causes the scope to assume a
vertical value that's, maybe, equivalent to the horizontal component when
no vertical signal is supplied?

If this is outlined somewhere in the manuals, then I apologize in advance
and maybe someone can point me to that. From what I've found, though, XY
mode seems to be covered pretty lightly in the manuals I have.

Thanks,
Barry - N4BUQ






Re: Question Regarding XY Mode

n4buq
 

Hi Siggi,

Okay - I read through that and it appears that I'm seeing the same results as others. Turning off CH1 will then allow the signal at CH1 to move the beam strictly horizontally (at least it does on my 2445 and I presume it will on the 2465B as well). Not sure I see that in the manuals though...

Thanks,
Barry - N4BUQ

----- Original Message -----
From: "Siggi" <siggi@...>
To: TekScopes@groups.io
Sent: Monday, April 1, 2019 8:35:14 AM
Subject: Re: [TekScopes] Question Regarding XY Mode

Hey Barry,

IIRC, CH1 provides the X deflection in XY mode. You can then display any or
all of the e input channels under that X deflection, including CH1. This is
a little confusing, as you'll simply produce a diagonal line on the screen
(modulo X deflection bandwidth constraints).

There has surely been discussion of this before on the forum, see e.g.
https://groups.io/g/TekScopes/message/61714.

Siggi

On Mon, Apr 1, 2019 at 9:14 AM n4buq <n4buq@...> wrote:

I have, among other models, a 2465B and I have what I assume to is a
rather basic question regarding XY mode.

Placing the scope in XY mode and with an AC signal on CH1, with no other
channels set to display, I get a display pattern that appears to have both
X and Y components (e.g. a 45-degree moving beam). Without a signal on a
vertical input, I would have assumed that CH1's voltage would affect only
the X and without any vertical input, the beam would move only horizontally
but apparently that's not the case.

XY mode does work as I'd expect with signals on, say, CH1 and CH2, but
with only one signal on CH1, I didn't expect to see a vertical component.
Is there something about that setup that causes the scope to assume a
vertical value that's, maybe, equivalent to the horizontal component when
no vertical signal is supplied?

If this is outlined somewhere in the manuals, then I apologize in advance
and maybe someone can point me to that. From what I've found, though, XY
mode seems to be covered pretty lightly in the manuals I have.

Thanks,
Barry - N4BUQ






Re: SG502 frequency dial question

Albert Otten
 

On Mon, Apr 1, 2019 at 04:02 PM, Tim Phillips wrote:


From Tim P (UK)

Re the SG502 - should the fine frequency dial / knob just go round and
round with no end stops? (It isn't the reduction drive slipping, I
checked). It seems to work OK.
Thanks
Tim
Mine does the same. And I have seen this with dials or knobs of some other plugins also.
Albert

Re: Question Regarding XY Mode

Chuck Harris
 

Hi Barry,

It's a little confusing to think of, but try this:

The CH1 or X BNC connector becomes the "X" deflection
signal, period.

Now, where does the "Y" deflection come from?

The "Y" deflection becomes whatever is set for display
by the bank of switches that shows CH1, CH2, CH3, CH4...

So, if no switch is depressed, you get an X deflection,
with no "Y", or a straight horizontal line.
If the CH1 is depressed, you get CH1 on both the X and Y
deflection, which results in a 45 degree line.

If CH1 is released, and CH2 is depressed, you get a conventional
X-Y display where CH1 is X, and CH2 is Y. The same goes
for CH3, and CH4.

-Chuck Harris

n4buq wrote:

Hi Siggi,

Okay - I read through that and it appears that I'm seeing the same results as others. Turning off CH1 will then allow the signal at CH1 to move the beam strictly horizontally (at least it does on my 2445 and I presume it will on the 2465B as well). Not sure I see that in the manuals though...

Thanks,
Barry - N4BUQ

----- Original Message -----
From: "Siggi" <siggi@...>
To: TekScopes@groups.io
Sent: Monday, April 1, 2019 8:35:14 AM
Subject: Re: [TekScopes] Question Regarding XY Mode

Hey Barry,

IIRC, CH1 provides the X deflection in XY mode. You can then display any or
all of the e input channels under that X deflection, including CH1. This is
a little confusing, as you'll simply produce a diagonal line on the screen
(modulo X deflection bandwidth constraints).

There has surely been discussion of this before on the forum, see e.g.
https://groups.io/g/TekScopes/message/61714.

Siggi

On Mon, Apr 1, 2019 at 9:14 AM n4buq <n4buq@...> wrote:

I have, among other models, a 2465B and I have what I assume to is a
rather basic question regarding XY mode.

Placing the scope in XY mode and with an AC signal on CH1, with no other
channels set to display, I get a display pattern that appears to have both
X and Y components (e.g. a 45-degree moving beam). Without a signal on a
vertical input, I would have assumed that CH1's voltage would affect only
the X and without any vertical input, the beam would move only horizontally
but apparently that's not the case.

XY mode does work as I'd expect with signals on, say, CH1 and CH2, but
with only one signal on CH1, I didn't expect to see a vertical component.
Is there something about that setup that causes the scope to assume a
vertical value that's, maybe, equivalent to the horizontal component when
no vertical signal is supplied?

If this is outlined somewhere in the manuals, then I apologize in advance
and maybe someone can point me to that. From what I've found, though, XY
mode seems to be covered pretty lightly in the manuals I have.

Thanks,
Barry - N4BUQ








Re: Question Regarding XY Mode

n4buq
 

Hi Chuck,

Okay - that makes sense. Thanks for the clarification.

I presume, then, that it's possible to display three XY patterns, (all sharing a common X) correct?

Thanks,
Barry - N4BUQ

----- Original Message -----
From: "Chuck Harris" <cfharris@...>
To: TekScopes@groups.io
Sent: Monday, April 1, 2019 9:27:23 AM
Subject: Re: [TekScopes] Question Regarding XY Mode

Hi Barry,

It's a little confusing to think of, but try this:

The CH1 or X BNC connector becomes the "X" deflection
signal, period.

Now, where does the "Y" deflection come from?

The "Y" deflection becomes whatever is set for display
by the bank of switches that shows CH1, CH2, CH3, CH4...

So, if no switch is depressed, you get an X deflection,
with no "Y", or a straight horizontal line.
If the CH1 is depressed, you get CH1 on both the X and Y
deflection, which results in a 45 degree line.

If CH1 is released, and CH2 is depressed, you get a conventional
X-Y display where CH1 is X, and CH2 is Y. The same goes
for CH3, and CH4.

-Chuck Harris

n4buq wrote:
Hi Siggi,

Okay - I read through that and it appears that I'm seeing the same results
as others. Turning off CH1 will then allow the signal at CH1 to move the
beam strictly horizontally (at least it does on my 2445 and I presume it
will on the 2465B as well). Not sure I see that in the manuals though...

Thanks,
Barry - N4BUQ

----- Original Message -----
From: "Siggi" <siggi@...>
To: TekScopes@groups.io
Sent: Monday, April 1, 2019 8:35:14 AM
Subject: Re: [TekScopes] Question Regarding XY Mode

Hey Barry,

IIRC, CH1 provides the X deflection in XY mode. You can then display any
or
all of the e input channels under that X deflection, including CH1. This
is
a little confusing, as you'll simply produce a diagonal line on the screen
(modulo X deflection bandwidth constraints).

There has surely been discussion of this before on the forum, see e.g.
https://groups.io/g/TekScopes/message/61714.

Siggi

On Mon, Apr 1, 2019 at 9:14 AM n4buq <n4buq@...> wrote:

I have, among other models, a 2465B and I have what I assume to is a
rather basic question regarding XY mode.

Placing the scope in XY mode and with an AC signal on CH1, with no other
channels set to display, I get a display pattern that appears to have
both
X and Y components (e.g. a 45-degree moving beam). Without a signal on a
vertical input, I would have assumed that CH1's voltage would affect only
the X and without any vertical input, the beam would move only
horizontally
but apparently that's not the case.

XY mode does work as I'd expect with signals on, say, CH1 and CH2, but
with only one signal on CH1, I didn't expect to see a vertical component.
Is there something about that setup that causes the scope to assume a
vertical value that's, maybe, equivalent to the horizontal component when
no vertical signal is supplied?

If this is outlined somewhere in the manuals, then I apologize in advance
and maybe someone can point me to that. From what I've found, though, XY
mode seems to be covered pretty lightly in the manuals I have.

Thanks,
Barry - N4BUQ










Re: Question Regarding XY Mode

Chuck Harris
 

Hi Barry,

That is precisely true. You can have 4 different Y
signals all sharing the same CH1 or X signal.

One thing I should mention is that the 2465 family
defaults to CH1 on the display, if no channels are
selected for display.

-Chuck Harris

n4buq wrote:

Hi Chuck,

Okay - that makes sense. Thanks for the clarification.

I presume, then, that it's possible to display three XY patterns, (all sharing a common X) correct?

Thanks,
Barry - N4BUQ

----- Original Message -----
From: "Chuck Harris" <cfharris@...>
To: TekScopes@groups.io
Sent: Monday, April 1, 2019 9:27:23 AM
Subject: Re: [TekScopes] Question Regarding XY Mode

Hi Barry,

It's a little confusing to think of, but try this:

The CH1 or X BNC connector becomes the "X" deflection
signal, period.

Now, where does the "Y" deflection come from?

The "Y" deflection becomes whatever is set for display
by the bank of switches that shows CH1, CH2, CH3, CH4...

So, if no switch is depressed, you get an X deflection,
with no "Y", or a straight horizontal line.
If the CH1 is depressed, you get CH1 on both the X and Y
deflection, which results in a 45 degree line.

If CH1 is released, and CH2 is depressed, you get a conventional
X-Y display where CH1 is X, and CH2 is Y. The same goes
for CH3, and CH4.

-Chuck Harris

Re: CG551AP - has anyone seen this problem before?

 

I've ordered some 2200uF low ESR 105C Panasonic caps. That should be plenty
adequate to replace the 510uF wet Tantalum (though the replacements are
bigger - it's amazing how small those wet tantalums were for a given
capacity).

The problem with errors 85 and 86 was that Q1412 on the A7 board (schematic
<24>) was shorted! Replacing it has restored normal service!

Now what was I doing when I found the CG551AP had thrown a sulk???

Cheers
David

-----Original Message-----
From: TekScopes@groups.io [mailto:TekScopes@groups.io] On Behalf Of David C.
Partridge
Sent: 30 March 2019 15:33
To: TekScopes@groups.io; TekScopes2@groups.io
Subject: Re: [TekScopes] CG551AP - has anyone seen this problem before?

Repeat after me "First check the supplies"!

The 510uF caps on the power board (A5) for the plus and minus 15V supplies
were sick - result lots of ripple.

The parts list says these are Sprague 109D caps which I think are wet
tantalums which I've never known to fail except for failed seals letting out
the acid.

The parts actually fitted were something else - markings:

40EW517-
C025U1A
+510UF
25V 85°C
15V 125°C
80-25M/E

I replaced them for now with some 470uF 63V regular electrolytic caps that I
had in stock which banished most of the errors. If these were originally
wet tantalum parts, should I increase the capacity to somewhere around
2000uF or will the fact that I used 63V parts reduce the ESR enough to be
OK?

I should probably also replace the 68uF capacitors on the 25V supplies as
they are they appear to come from the same stable as the ones above and
therefore suspect.

It still throws error 85 and 86 (Mid Edge) during self test and there's no
useable output in Edge mode between 2V and 20V. It also displays "Uncal"
when I turn on the output.

When I select 2V/Div in Edge mode the SAC voltage is 0.2V which seems
correct given that the gain of the Mid Edge amplifier (U1412, R1421, Q1413,
R1422) is -10.

Low SAC tests OK, so I need to do the Mid Edge Generator Check
(Troubleshooting Tree 12). A job for another day!

David
-----Original Message-----
From: TekScopes@groups.io [mailto:TekScopes@groups.io] On Behalf Of David C.
Partridge
Sent: 29 March 2019 18:35
To: TekScopes@groups.io; TekScopes2@groups.io
Subject: Re: [TekScopes] CG551AP - has anyone seen this problem before?

Progress!

Replaced F114 fuse on the power board, and now I get errors 51, 52, 85, 87

Looking at the nominal 1V DC output it is 2.7kHz 1Vpp sine wave centred on
+1V.

I've seen this before! See:
<https://groups.io/g/TekScopes/topic/7657614#131075>

Hmmm I can replace C1002 and C1003 again but I don't think this attacks the
root cause.

Any thoughts are welcome.

David
-----Original Message-----
From: TekScopes@groups.io [mailto:TekScopes@groups.io] On Behalf Of David C.
Partridge
Sent: 29 March 2019 14:01
To: TekScopes@groups.io; TekScopes2@groups.io
Subject: Re: [TekScopes] CG551AP - has anyone seen this problem before?

Well I hunted flaky tantalums and found no obvious ones. After re-assembly
and re-seating ROMs on CPU board, I'm now seeing the following error codes:

51, 52, 53, 54, 55 (Both Low SAC and High SAC)
56, 57 (Current mode)
81, 82, 83, 84, 85, 86, 87, 88 (All edge mode errors!)

Which is a step forward in one sense, but about 15 steps backward!

Suggestions most welcome!

Thanks
David


-----Original Message-----
From: TekScopes@groups.io [mailto:TekScopes@groups.io] On Behalf Of David C.
Partridge
Sent: 29 March 2019 12:52
To: TekScopes; TekScopes2@groups.io
Subject: [TekScopes] CG551AP - has anyone seen this problem before?

I turned on my CG551AP yesterday. It flashed up the SELF TEST message in
normal brightness, then the display blanked and the only sign of life was
the LEDs just above the trigger output BNC which were dimly illuminated.

Has anyone seen this behaviour before? If so what was the problem?

I'm guessing a shorted tantalum capacitor :( ...

David

Re: SG502 frequency dial question

Fred Schumacher
 

My FG502 does the same.
Fred

On 1 apr. 2019, at 16:19, Albert Otten <aodiversen@...> wrote:

On Mon, Apr 1, 2019 at 04:02 PM, Tim Phillips wrote:


From Tim P (UK)

Re the SG502 - should the fine frequency dial / knob just go round and
round with no end stops? (It isn't the reduction drive slipping, I
checked). It seems to work OK.
Thanks
Tim
Mine does the same. And I have seen this with dials or knobs of some other plugins also.
Albert


Re: Question Regarding XY Mode

Stephen Hanselman
 

Chuck,

Thanks for that, I've had to keep a 465 around because I never could get the 2465 to work and was too lazy to read the manual

steve

-----Original Message-----
From: TekScopes@groups.io <TekScopes@groups.io> On Behalf Of Chuck Harris
Sent: Monday, April 1, 2019 8:51 AM
To: TekScopes@groups.io
Subject: Re: [TekScopes] Question Regarding XY Mode

Hi Barry,

That is precisely true. You can have 4 different Y signals all sharing the same CH1 or X signal.

One thing I should mention is that the 2465 family defaults to CH1 on the display, if no channels are selected for display.

-Chuck Harris

n4buq wrote:
Hi Chuck,

Okay - that makes sense. Thanks for the clarification.

I presume, then, that it's possible to display three XY patterns, (all sharing a common X) correct?

Thanks,
Barry - N4BUQ

----- Original Message -----
From: "Chuck Harris" <cfharris@...>
To: TekScopes@groups.io
Sent: Monday, April 1, 2019 9:27:23 AM
Subject: Re: [TekScopes] Question Regarding XY Mode

Hi Barry,

It's a little confusing to think of, but try this:

The CH1 or X BNC connector becomes the "X" deflection signal, period.

Now, where does the "Y" deflection come from?

The "Y" deflection becomes whatever is set for display by the bank of
switches that shows CH1, CH2, CH3, CH4...

So, if no switch is depressed, you get an X deflection, with no "Y",
or a straight horizontal line.
If the CH1 is depressed, you get CH1 on both the X and Y deflection,
which results in a 45 degree line.

If CH1 is released, and CH2 is depressed, you get a conventional X-Y
display where CH1 is X, and CH2 is Y. The same goes for CH3, and
CH4.

-Chuck Harris

What is a good use of two 620 monitors these days?

John Griessen
 

I'm needing to lighten my load and not thinking of a great reason to keep these. Is there one?
I don't have an analog computer like on the tekwiki page for them...

After searching images of them on the web, they could be good with a 7912AD.
They are good for displaying a CRT clock...
Opthalmologists use them modified to be a DBR-310

Anyone here want one or two in used good condition for $35 each plus shipping?


Specifications
X/Y bandwidth DC to 2 MHz (rise time <175 ns)
Z bandwidth DC to 5 MHz (rise time <70 ns)
Input impedance 1 MΩ shunted by <47 pF
Maximum input ±25 V

Re: Question Regarding XY Mode

n4buq
 

CH2 through CH4 can have Y independent of X but CH1's Y will always have X's value (the diagonal line), correct?

Yes, I knew that about CH1 being the default display when no channels are selected for display but didn't know how that worked in with XY mode but that does help clarify it all nonetheless.

Thanks,
Barry - N4BUQ

----- Original Message -----
From: "Chuck Harris" <cfharris@...>
To: TekScopes@groups.io
Sent: Monday, April 1, 2019 10:51:03 AM
Subject: Re: [TekScopes] Question Regarding XY Mode

Hi Barry,

That is precisely true. You can have 4 different Y
signals all sharing the same CH1 or X signal.

One thing I should mention is that the 2465 family
defaults to CH1 on the display, if no channels are
selected for display.

-Chuck Harris

n4buq wrote:
Hi Chuck,

Okay - that makes sense. Thanks for the clarification.

I presume, then, that it's possible to display three XY patterns, (all
sharing a common X) correct?

Thanks,
Barry - N4BUQ

----- Original Message -----
From: "Chuck Harris" <cfharris@...>
To: TekScopes@groups.io
Sent: Monday, April 1, 2019 9:27:23 AM
Subject: Re: [TekScopes] Question Regarding XY Mode

Hi Barry,

It's a little confusing to think of, but try this:

The CH1 or X BNC connector becomes the "X" deflection
signal, period.

Now, where does the "Y" deflection come from?

The "Y" deflection becomes whatever is set for display
by the bank of switches that shows CH1, CH2, CH3, CH4...

So, if no switch is depressed, you get an X deflection,
with no "Y", or a straight horizontal line.
If the CH1 is depressed, you get CH1 on both the X and Y
deflection, which results in a 45 degree line.

If CH1 is released, and CH2 is depressed, you get a conventional
X-Y display where CH1 is X, and CH2 is Y. The same goes
for CH3, and CH4.

-Chuck Harris


Re: SG502 frequency dial question

Tim Phillips
 

From Tim P (UK)
Thanks everyone, It had me worried for a bit, also the dial skirt had
broken off.
!
Tim


On Mon, 1 Apr 2019 at 17:19, Fred Schumacher via Groups.Io <fred_schumacher=
yahoo.com@groups.io> wrote:

My FG502 does the same.
Fred
On 1 apr. 2019, at 16:19, Albert Otten <aodiversen@...> wrote:

On Mon, Apr 1, 2019 at 04:02 PM, Tim Phillips wrote:


From Tim P (UK)

Re the SG502 - should the fine frequency dial / knob just go round and
round with no end stops? (It isn't the reduction drive slipping, I
checked). It seems to work OK.
Thanks
Tim
Mine does the same. And I have seen this with dials or knobs of some
other plugins also.
Albert





Re: Question Regarding XY Mode

Chuck Harris
 

When CH1 is selected, all you will get is a 45 degree
line, as you are displaying X on the X axis, and X on
the Y axis... not terribly useful, unless you like
45 degree lines.

Because the 2465 family defaults to displaying CH1
when no channels are selected for display, you will
see the same 45 degree line whether no channels are
selected, or just CH1 is selected.

-Chuck Harris

n4buq wrote:

CH2 through CH4 can have Y independent of X but CH1's Y will always have X's value (the diagonal line), correct?

Yes, I knew that about CH1 being the default display when no channels are selected for display but didn't know how that worked in with XY mode but that does help clarify it all nonetheless.

Thanks,
Barry - N4BUQ

----- Original Message -----
From: "Chuck Harris" <cfharris@...>
To: TekScopes@groups.io
Sent: Monday, April 1, 2019 10:51:03 AM
Subject: Re: [TekScopes] Question Regarding XY Mode

Hi Barry,

That is precisely true. You can have 4 different Y
signals all sharing the same CH1 or X signal.

One thing I should mention is that the 2465 family
defaults to CH1 on the display, if no channels are
selected for display.

-Chuck Harris

n4buq wrote:
Hi Chuck,

Okay - that makes sense. Thanks for the clarification.

I presume, then, that it's possible to display three XY patterns, (all
sharing a common X) correct?

Thanks,
Barry - N4BUQ

----- Original Message -----
From: "Chuck Harris" <cfharris@...>
To: TekScopes@groups.io
Sent: Monday, April 1, 2019 9:27:23 AM
Subject: Re: [TekScopes] Question Regarding XY Mode

Hi Barry,

It's a little confusing to think of, but try this:

The CH1 or X BNC connector becomes the "X" deflection
signal, period.

Now, where does the "Y" deflection come from?

The "Y" deflection becomes whatever is set for display
by the bank of switches that shows CH1, CH2, CH3, CH4...

So, if no switch is depressed, you get an X deflection,
with no "Y", or a straight horizontal line.
If the CH1 is depressed, you get CH1 on both the X and Y
deflection, which results in a 45 degree line.

If CH1 is released, and CH2 is depressed, you get a conventional
X-Y display where CH1 is X, and CH2 is Y. The same goes
for CH3, and CH4.

-Chuck Harris




Add Install Upgrade Counter Timer Option 06, 09 to 2465B

Timothy
 

Hi all,

I have a 2445 with the counter timer option and I would like to move the option to my 2465B. I have a original 2445 option manual I just bought on the way but I cant wait to find out if this is possible, is this difficult? Does it matter if the 2465B has serial > 50k?