Manual or schematic available for the High Amplitude Pulse Generator?
Just wondering if a manual/schematic is "out there" for the Tek High Amplitude Pulse Generator. ? ? ? ? ? ? ? -Dave
_,_._,___
|
Re: TroubleShooting Some TM500 gear.
On 02/20/2013 01:52 PM, Jim McClanahan wrote: It's an obvious idea, but instead of building a test jig into a "blank"plug-in
(which is probably going to be nearly impossible to find) you could build it
seperately and connect it using the plug available for the extension adapter
kit. I believe there are measurement points marked on the extension edge
connector. (Not that it helps much because that is up in the TM500 frame.) is a little thought sketch about blank TM500 plugin frames and face-plates that are easy to fab.
|
561A with two 3A9 plug-ins on Seattle Craigslist
I have no affiliation with the seller.
-Kurt
|
Re: [hp_agilent_equipment] e-Bay "Make offer" - CAMERA TUBE.... OT
I've had some time to read the manual and play with the 'scope. It
seems to work. I am pleased with the deal. I've figured out most of
the front panel button functions. I'll need to get a waveform
calculator keyboard at some point, but I've put the 7904A aside and
now have the 7854 on my bench. I will use it as my main 'scope for a
while to get the feel of things.
Thanks, everyone, for the help (especially Albert who fixed my
eyesight problem).
Cheers,
Dave
On 2/21/2013 7:49 PM, Dennis Tillman
wrote:
toggle quoted message
Show quoted text
?
Yes, pressing SCOPE gets rid of the self-test display,
but it also switches
between the acquired waveform (the digital side of this
analog/digital
scope) which you view with the STORED button or the real
time analog scope
which you view with the SCOPE button.
To see both the stored digital waveform and the real time
analog waveform at
the same time press the blue "f" button then the BOTH
button (which is the
same as the STORED button). BOTH is printed in blue above
STORED to indicate
you activate it by first pressing the blue "f" (for
function) button. Ditto
for any other labels in blue on the front panel.
-----Original Message-----
From: TekScopes@...
[mailto:TekScopes@...]
On Behalf
Of David
Sent: Thursday, February 21, 2013 11:42 AM
To: TekScopes@...
Subject: Re: [TekScopes] Fwd: Re: [hp_agilent_equipment]
e-Bay "Make offer"
- CAMERA TUBE.... OT
Immediately above and offset to the right of the "f" key
in the middle of
the keyboard is a button marked "SCOPE" in the section
marked "CRT DISPLAY".
It is usually the first button I press when powering the
7854 up just to get rid of the self test message.
On Thu, 21 Feb 2013 12:30:48 -0700, Dave Daniel kc0wjn@...>
wrote:
>"Scope" button? I know I need to read the manual, but
I don't see a
>button labeled "Scope" (or am I being too literal
here?) :)
>
>DaveD
>
>PS - You may want to post your power supply question
to the TekScopes
>and TekScopes@ Yahoo groups. I have moved this
response to those groups.
>
>-------- Original Message --------
>Subject: Re: [hp_agilent_equipment] e-Bay "Make offer"
- CAMERA
>TUBE.... OT
>Date: Thu, 21 Feb 2013 14:15:10 -0500
>From: ChuckA chuck@...>
>Reply-To: hp_agilent_equipment@...
>To: hp_agilent_equipment@...
>
>My 7854 does the same thing, I always thought it was
normal. I just
>press the "Scope" button and the "Self Test Complete"
message goes away.
>
>BTW:
>Anyone have a power supply they would part with for a
7854? My second
>unit the power supply is dead and I've given up trying
to fix it.
------------------------------------
Yahoo! Groups Links
|
Re: [hp_agilent_equipment] e-Bay "Make offer" - CAMERA TUBE.... OT
Yes, pressing SCOPE gets rid of the self-test display, but it also switches
between the acquired waveform (the digital side of this analog/digital
scope) which you view with the STORED button or the real time analog scope
which you view with the SCOPE button.
To see both the stored digital waveform and the real time analog waveform at
the same time press the blue "f" button then the BOTH button (which is the
same as the STORED button). BOTH is printed in blue above STORED to indicate
you activate it by first pressing the blue "f" (for function) button. Ditto
for any other labels in blue on the front panel.
toggle quoted message
Show quoted text
-----Original Message----- From: TekScopes@... [mailto:TekScopes@...] On Behalf Of David Sent: Thursday, February 21, 2013 11:42 AM To: TekScopes@... Subject: Re: [TekScopes] Fwd: Re: [hp_agilent_equipment] e-Bay "Make offer" - CAMERA TUBE.... OT Immediately above and offset to the right of the "f" key in the middle of the keyboard is a button marked "SCOPE" in the section marked "CRT DISPLAY". It is usually the first button I press when powering the 7854 up just to get rid of the self test message. On Thu, 21 Feb 2013 12:30:48 -0700, Dave Daniel <kc0wjn@...> wrote: "Scope" button? I know I need to read the manual, but I don't see a
button labeled "Scope" (or am I being too literal here?) :)
DaveD
PS - You may want to post your power supply question to the TekScopes
and TekScopes@ Yahoo groups. I have moved this response to those groups.
-------- Original Message --------
Subject: Re: [hp_agilent_equipment] e-Bay "Make offer" - CAMERA
TUBE.... OT
Date: Thu, 21 Feb 2013 14:15:10 -0500
From: ChuckA <chuck@...>
Reply-To: hp_agilent_equipment@...
To: hp_agilent_equipment@...
My 7854 does the same thing, I always thought it was normal. I just
press the "Scope" button and the "Self Test Complete" message goes away.
BTW:
Anyone have a power supply they would part with for a 7854? My second
unit the power supply is dead and I've given up trying to fix it. ------------------------------------ Yahoo! Groups Links
|
Pretty nice looking example of a 556. If I had the room, I never would have gotten rid of my last one. The quality of the trace is incredible...
It was that or my best ol' favorite 555 with the P7 CRT in it. No contest.
Tom
toggle quoted message
Show quoted text
--- In TekScopes@..., Cliff White <cn.white@...> wrote:
I know it's nicknamed evil-bay, but anyway, there's a 556 out there
right now. It's in Milwaukee, with Type 1A2 and CA plugins.
I have no affiliation with this seller.
--
Respectfully,
Cliff White, W5CNW
w5cnw@... <mailto:w5cnw@...>
|
Re: DC504 counter display
Hank,
I sent you an email, as I have 5 of the MAN10's to give you. Please reply off-list.
Taylor
toggle quoted message
Show quoted text
--- In TekScopes@..., David <davidwhess@...> wrote:
On Thu, 21 Feb 2013 16:00:40 -0600, John Griessen
<john@...> wrote:
On 02/21/2013 12:05 PM, larrys@... wrote:
But, this part is obsolete.
> I did find some on Ebay but the seller wants $10 each. I though that was a bit pricey.
>
> At a higher sn, Tek changed the displays to MAN3620 but those are obsolete too.
maybe it's time to make an adapter board. Since the height is a close fit,
could you cut out the area of the PCB where the row of LED digits is and solder the adapter PCB in there
on the back? if so, you could make a 2 layer board for new available inexpensive LEDs. It would be an evening of work but you could just cut a piece of
perforated board to fit and use point to point wiring with 5 x
standard 7 segment LED displays and 2 x LEDs for the overflow and
counting indicators.
The wiring is simplified since the display segment cathodes are all
wired in parallel. Find the right machined collet pins and you could
even socket the 7 segment displays.
|
Re: DC504 counter display
On Thu, 21 Feb 2013 16:00:40 -0600, John Griessen <john@...> wrote: On 02/21/2013 12:05 PM, larrys@... wrote:
But, this part is obsolete.
> I did find some on Ebay but the seller wants $10 each. I though that was a bit pricey.
>
> At a higher sn, Tek changed the displays to MAN3620 but those are obsolete too.
maybe it's time to make an adapter board. Since the height is a close fit,
could you cut out the area of the PCB where the row of LED digits is and solder the adapter PCB in there
on the back? if so, you could make a 2 layer board for new available inexpensive LEDs. It would be an evening of work but you could just cut a piece of perforated board to fit and use point to point wiring with 5 x standard 7 segment LED displays and 2 x LEDs for the overflow and counting indicators. The wiring is simplified since the display segment cathodes are all wired in parallel. Find the right machined collet pins and you could even socket the 7 segment displays.
|
Re: DC504 counter display
On 02/21/2013 12:05 PM, larrys@... wrote: But, this part is obsolete.
> I did find some on Ebay but the seller wants $10 each. I though that was a bit pricey.
>
> At a higher sn, Tek changed the displays to MAN3620 but those are obsolete too. maybe it's time to make an adapter board. Since the height is a close fit, could you cut out the area of the PCB where the row of LED digits is and solder the adapter PCB in there on the back? if so, you could make a 2 layer board for new available inexpensive LEDs.
|
scanned: 545 Cal and Maintenance Procedure
A generous member of this forum lent me this document for scanning. Here is the PDF:
If anybody has any Tek-related documents they feel should be scanned (for the benefit of the community), feel free to mail them to me. Email me off-list for the shipping address. thanks, -Kurt
|
Re: [hp_agilent_equipment] e-Bay "Make offer" - CAMERA TUBE.... OT
It is, apparently, the former. I know my eyesight is getting bad,
but that was ridiculous. I see it and it does turn off the message.
The vertical and horizontal mode lights do all light up during the
boot process (well, the LEFT vertical mode lamp is out, but I think
I might have a spare), and then return to normal after the self-test
message is displayed.
Cool.
Thanks.
Dang. Now I need another bench.
DaveD
On 2/21/2013 12:40 PM, Albert wrote:
toggle quoted message
Show quoted text
?
Either you need new glasses or the 7854 needs new labels
;=)
2nd row 5th button
Albert
> "Scope" button? I know I need to read the manual, but
I don't see a
> button labeled "Scope" (or am I being too literal
here?) :)
>
> DaveD
|
Re: [hp_agilent_equipment] e-Bay "Make offer" - CAMERA TUBE.... OT
Immediately above and offset to the right of the "f" key in the middle of the keyboard is a button marked "SCOPE" in the section marked "CRT DISPLAY". It is usually the first button I press when powering the 7854 up just to get rid of the self test message. On Thu, 21 Feb 2013 12:30:48 -0700, Dave Daniel <kc0wjn@...> wrote: "Scope" button? I know I need to read the manual, but I don't see a
button labeled "Scope" (or am I being too literal here?) :)
DaveD
PS - You may want to post your power supply question to the TekScopes
and TekScopes@ Yahoo groups. I have moved this response to those groups.
-------- Original Message --------
Subject: Re: [hp_agilent_equipment] e-Bay "Make offer" - CAMERA
TUBE.... OT
Date: Thu, 21 Feb 2013 14:15:10 -0500
From: ChuckA <chuck@...>
Reply-To: hp_agilent_equipment@...
To: hp_agilent_equipment@...
My 7854 does the same thing, I always thought it was normal. I just
press the "Scope" button and the "Self Test Complete" message goes away.
BTW:
Anyone have a power supply they would part with for a 7854? My second
unit the power supply is dead and I've given up trying to fix it.
|
Re: [hp_agilent_equipment] e-Bay "Make offer" - CAMERA TUBE.... OT
Either you need new glasses or the 7854 needs new labels ;=)
2nd row 5th button
Albert
toggle quoted message
Show quoted text
"Scope" button? I know I need to read the manual, but I don't see a
button labeled "Scope" (or am I being too literal here?) :)
DaveD
|
Re: [hp_agilent_equipment] e-Bay "Make offer" - CAMERA TUBE.... OT
It's just above the blue "f" (function) button in that mass of buttons to the right of the CRT.
Dave Casey
Quoting Dave Daniel <kc0wjn@...>:
toggle quoted message
Show quoted text
"Scope" button? I know I need to read the manual, but I don't see a button labeled "Scope" (or am I being too literal here?) :)
DaveD
PS - You may want to post your power supply question to the TekScopes and TekScopes@ Yahoo groups. I have moved this response to those groups.
-------- Original Message --------
Subject: Re: [hp_agilent_equipment] e-Bay "Make offer" - CAMERA TUBE.... OT
Date: Thu, 21 Feb 2013 14:15:10 -0500
From: ChuckA <chuck@...>
Reply-To: hp_agilent_equipment@...
To: hp_agilent_equipment@...
My 7854 does the same thing, I always thought it was normal. I just
press the "Scope" button and the "Self Test Complete" message goes away.
BTW:
Anyone have a power supply they would part with for a 7854? My second
unit the power supply is dead and I've given up trying to fix it.
On 2/21/2013 1:31 PM, Dave Daniel wrote:
I bought a "guaranteed working" 7854 on eBay and it arrived in what was
obviously too small a box. The packaging was barely good enough to
preserve the 'scope's condition, but it appears that nothing was damaged.
The 'scope doesn't seem to work, but I may not know how to make it work
yet. It shows "Self Test Complete", but then that message never goes away.
I also purchased a 7B85A with manual, and a 7B92A. The 7B92A was
delivered, and it had a manual with it, which was a surprise. But the
bigger surprise came when the 7B85A arrived without a manual and turned
out to actually be another 7B92A. The first 7B92A that I received was
actually from the 7B85A auction. Looking more closely at the auction
photo shows a 7B92A and manual, with text describing a 7B85A. The second
7B92A was the one I knew I was buying. I now realize that there is no
such thing as a 7B85A, only a 7B85. This has had me confused for several
days. I now have two working 7B92As. Guess I didn't need a 7B85A!
DaveD
On 2/21/2013 10:47 AM, Daniel Koller wrote:
Sorry, this begs the question, what are you doing with a US camera
tube in the UK? I'm pretty sure your TV system was completely
different from ours.
Dan
________________________________
From: Paul Bicknell testeq@... <mailto:testeq%40bicknells.f2s.com>
To: hp_agilent_equipment@... <mailto:hp_agilent_equipment%40yahoogroups.com>
Sent: Thursday, February 21, 2013 12:34 PM
Subject: RE: [hp_agilent_equipment] e-Bay "Make offer"
Hi Dave
Sorry to hear about the smashed up equipment
Could you let the rest of us into the Sellers Name so that we don't end up
with smashed up equipment
I recently had a TV camera tube sent from the US it arrived in tact
and the right way up I was lucky
Regards Paul B South Coast UK radio@... <mailto:radio%40bicknells.f2s.com>
_____
From: hp_agilent_equipment@... <mailto:hp_agilent_equipment%40yahoogroups.com>
[mailto:hp_agilent_equipment@... <mailto:hp_agilent_equipment%40yahoogroups.com>
] On Behalf Of David Kirkby
Sent: 21 February 2013 17:06
To: hp_agilent_equipment@... <mailto:hp_agilent_equipment%40yahoogroups.com>
Subject: Re: [hp_agilent_equipment] e-Bay "Make offer"
On 21 February 2013 15:31, Lizeth Norman normanlizeth@... <mailto:normanlizeth%40gmail.com>
wrote:
I was pointing out that some sellers are just complete idiots!
Snip
Gala I agree. In fact some of the arguments I've had with eBay sellers has
been down to their total stupidity.
I won an auction for an HP oscillator model X. After the auction the
seller tells me he has a model Y, if I would have prefered that. I
looked up the specs of Y, found they were inferior to that of X, so I
said I wanted model X, which was what the auction was for. So what
does the idiot send me? Model Y of course.
What I found odd though, is that the stupdity of these sellers always
seems to result in me getting something inferior to what was
auctioned, rather than superior.
Packaging seems to be an issue which lets lots of sellers down. I will
not again buy an expensive/heavy bit of test kit, unless I am sure the
seller knows how to package it properly. Here is how some studid idiot
shipped an vector network analyzer from the US to the UK.
ging/badly-shipped-8753A-and-85046A.jpg
Needless to say it arrived in the UK quite smashed up, and the US
seller was less than helpful.
Dave
------------------------------------
Yahoo! Groups Links
-----
No virus found in this message.
Checked by AVG - www.avg.com
Version: 2013.0.2899 / Virus Database: 2639/6113 - Release Date: 02/18/13
--
See Early TV at:
www.myvintagetv.com
|
Re: [hp_agilent_equipment] e-Bay "Make offer" - CAMERA TUBE.... OT
"Scope" button? I know I need to read the manual, but I don't see a
button labeled "Scope" (or am I being too literal here?) :)
DaveD
PS - You may want to post your power supply question to the
TekScopes and TekScopes@ Yahoo groups. I have moved this response to
those groups.
toggle quoted message
Show quoted text
-------- Original Message --------
?
My 7854 does the same thing, I always thought it was
normal. I just
press the "Scope" button and the "Self Test Complete"
message goes away.
BTW:
Anyone have a power supply they would part with for a
7854? My second
unit the power supply is dead and I've given up trying to
fix it.
On 2/21/2013 1:31 PM, Dave Daniel wrote:
> I bought a "guaranteed working" 7854 on eBay and it
arrived in what was
> obviously too small a box. The packaging was barely
good enough to
> preserve the 'scope's condition, but it appears that
nothing was damaged.
>
> The 'scope doesn't seem to work, but I may not know
how to make it work
> yet. It shows "Self Test Complete", but then that
message never goes away.
>
> I also purchased a 7B85A with manual, and a 7B92A.
The 7B92A was
> delivered, and it had a manual with it, which was a
surprise. But the
> bigger surprise came when the 7B85A arrived without a
manual and turned
> out to actually be another 7B92A. The first 7B92A
that I received was
> actually from the 7B85A auction. Looking more closely
at the auction
> photo shows a 7B92A and manual, with text describing
a 7B85A. The second
> 7B92A was the one I knew I was buying. I now realize
that there is no
> such thing as a 7B85A, only a 7B85. This has had me
confused for several
> days. I now have two working 7B92As. Guess I didn't
need a 7B85A!
>
> DaveD
>
>
> On 2/21/2013 10:47 AM, Daniel Koller wrote:
>> Sorry, this begs the question, what are you doing
with a US camera
>> tube in the UK? I'm pretty sure your TV system
was completely
>> different from ours.
>>
>> Dan
>>
>> ________________________________
>> From: Paul Bicknell testeq@...
>> >
>> To: hp_agilent_equipment@...
>>
>> Sent: Thursday, February 21, 2013 12:34 PM
>> Subject: RE: [hp_agilent_equipment] e-Bay "Make
offer"
>>
>>
>>
>> Hi Dave
>>
>> Sorry to hear about the smashed up equipment
>>
>> Could you let the rest of us into the Sellers
Name so that we don't end up
>> with smashed up equipment
>>
>> I recently had a TV camera tube sent from the US
it arrived in tact
>> and the right way up I was lucky
>>
>> Regards Paul B South Coast UK radio@...
>>
>>
>> _____
>>
>> From: hp_agilent_equipment@...
>>
>> [mailto:hp_agilent_equipment@...
>> ] On Behalf Of David Kirkby
>> Sent: 21 February 2013 17:06
>> To: hp_agilent_equipment@...
>>
>> Subject: Re: [hp_agilent_equipment] e-Bay "Make
offer"
>>
>> On 21 February 2013 15:31, Lizeth Norman normanlizeth@...
>>
>>> wrote:
>>> I was pointing out that some sellers are just
complete idiots!
>>>
>>> Snip
>>>
>>> Gala
>> I agree. In fact some of the arguments I've had
with eBay sellers has
>> been down to their total stupidity.
>>
>> I won an auction for an HP oscillator model X.
After the auction the
>> seller tells me he has a model Y, if I would have
prefered that. I
>> looked up the specs of Y, found they were
inferior to that of X, so I
>> said I wanted model X, which was what the auction
was for. So what
>> does the idiot send me? Model Y of course.
>>
>> What I found odd though, is that the stupdity of
these sellers always
>> seems to result in me getting something inferior
to what was
>> auctioned, rather than superior.
>>
>> Packaging seems to be an issue which lets lots of
sellers down. I will
>> not again buy an expensive/heavy bit of test kit,
unless I am sure the
>> seller knows how to package it properly. Here is
how some studid idiot
>> shipped an vector network analyzer from the US to
the UK.
>>
>>
>> ging/badly-shipped-8753A-and-85046A.jpg
>>
>> Needless to say it arrived in the UK quite
smashed up, and the US
>> seller was less than helpful.
>>
>> Dave
>>
>> [Non-text portions of this message have been
removed]
>>
>> [Non-text portions of this message have been
removed]
>>
>>
>
>
>
>
>
>
> ------------------------------------
>
> Yahoo! Groups Links
>
>
>
>
>
>
> -----
> No virus found in this message.
> Checked by AVG -
> Version: 2013.0.2899 / Virus Database: 2639/6113 -
Release Date: 02/18/13
>
>
--
See Early TV at:
|
Re: Frequency response flatness in conventional sampling (say 7S11/S
Hi David,
Your reasoning might be all right for the blow-by effect itself. What still remains is the effect of blow-by compensation. Not at high frequencies, but at frequencies in the bandpass (S-4: 0.5 to 3 MHz) of the preamplifier. The 65-500 MHz oscillator has a 3 MHz reference.
I forgot that the S-4 has a trigger output. I used my S-4 now and found that the 3 MHz amplitude was 10% low compared to the 65 MHz amplitude, while the S-2 gave almost identical amplitudes. Above 65 MHz the S-2 and the S-4 give nearly identical results except that the S-4 shows a superimposed decrease of amplitude when frequency increases (about 1% per 100 MHz). Terrible enough of course!
Because of the far deviating results at 3 MHz I did some low frequency measurements at the S-4 while comparing R18 fully cw to fully ccw. At 3 MHz the difference was +1%, increasing to around +3% around 1.5 Mhz, then decreasing to -3% around 0.4 MHz. No difference at 50 kHz.
A severe amplitude drop of the S-4 at and around 3 MHz was present regardless the signal generator used (SG503, Type 191, GR-type). The effect of blow-by compensation is far too small to account for this.
I didn't check my S-4 for faults like diode leakage.
The SG504 (which I don't have) takes the "monitoring" signal from a point somewhere before the leveling amplifier. A similar pick-off would be possible in the GR-type oscillators indeed.
BTW I think there has been some mechanical change in the 65-500 MHz oscillator after I checked flatness some time ago. The frequency response with S-2 is very nice flat up to 440 MHz, but then increases very sharp to a +10% peak at 465 MHz. Then drops again. The oscillator is very sensitive to the (mechanical) position of an adjustable coupling loop.
Albert
toggle quoted message
Show quoted text
--- In TekScopes@..., David <davidwhess@...> wrote:
Sorry for taking a while to get back to you on this. It seems it is
time for me to add an S-6 manual to my binder of sampling stuff.
Here is why I do not believe the blow-by matters in this application:
When you are looking at the aberrations from a clean pulse measured by
a sampling head, instead of the impulse response which correlates with
the frequency and phase response of a linear network, you see charge
coupled through the sampling bridge from the fast edge and level
shift.
When measuring an AC signal, there are no fast edges and no DC level
shift to couple through the sampling bridge. In addition, the memory
gate is too slow to see any AC leakage. There is a simulation showing
the S-6 AC feedthrough here:
I like discussing this subject because it yields ideas for correcting
the annoying blow-by response in my S-4 sampling heads. Unfortunately
if it was easy to correct, I suspect Tektronix would have done so.
Do you actually need triggering to see just the peak to peak values? I
think you could add probe a different part of the generator circuit to
find a trigger so the leveled output could go only to the sampling
head.
On Mon, 18 Feb 2013 17:02:21 -0000, "Albert" <aodiversen@...>
wrote:
Hi David,
So far I didn't find effect of S-6 blow-by adjustment on sine wave amplitudes. I probably did something wrong, since the effect on square waves (tilt) is considerable. A change of C20 in the S-6 only causes a vertical shift of the sine wave. I tested some frequencies from 100 kHz to 1 GHz.
It's very annoying that the SG503 and my GR-type oscillators don't have a trigger output. Since the S-6 doesn't have a trigger output either I'm forced to use a CT-3 trigger pick-off and external triggering. With the S-2 I can compare internal triggering (CT-3 omitted) with such external triggering. The CT-3 has considerable effect on frequency response, about 6% to 8% downward trend when frequency is increased to 900 MHz.
Albert
--- In TekScopes@..., David <davidwhess@> wrote:
The blow-by effect on frequency response could be tested. Grossly
misadjust it deliberately and see if the frequency response changes. I
found it to be the easiest thing to calibrate on my S-4 sampling heads
so I would not worry about temporarily misadjusting it.
I would also compare two different types of sampling heads like an S-2
and S-4 which have significantly different transient response
characteristics in the 10ns range do to design and see if they agree.
I may try the above with an S-1 and S-4 and my SG503 just to see what
kind of results I get.
|
Re: [hp_agilent_equipment] 7854 (was "e-Bay "Make offer" - CAMERA TUBE.... OT" on hp-agilent group)
John,
I'm moving this to the TekScopes Yahoo group.
In answer to your question, no, I have not done more than look
briefly at the ops manual. That is why I wrote that I may not know
how to make it work yet. I downloaded a PDF of the operator's manual
yesterday and will hopefully get a chance to play with the 'scope
tonight. The display seems to work just fine, and I have loaded it
with a vertical amp and time base and I am able to display signals
from a function generator, so it is most likely me and not the
'scope that is not working correctly. The 'scope came with a 7B87
that has a coax terminated in a BNC connector coming out of the
plug-in. I haven't looked to see what circuit node is being brought
out by the coax. I plan to put a couple of 7A18s that I have in it,
along with 7B87s (I have two, now) and see what's what. I did notice
in the Tek catalog that the 7B87 is required if one wants to use the
pre-trigger feature. Eventually I'll get a pair of 7A24s for use in
my 7000-series 'scopes.
The 'scope is in very good cosmetic condition, so it does not appear
to have been abused. For $225, I couldn't resist buying it, even if
it needs some work, particularly as it is *supposed* to work.
I have PDFs of both the user and service manual, and I have an
original of the service manual. I was pretty amused to see how big
the service manual is (I thought the package contained a different
instrument that I had purchased until I unpacked it and saw this
huge and heavy manual). I need to buy an original Operator's
Instruction Manual.
DaveD
toggle quoted message
Show quoted text
-------- Original Message --------
?
> I bought a "guaranteed working" 7854 on eBay and it
arrived in what was
> obviously too small a box. The packaging was barely
good enough to
> preserve the 'scope's condition, but it appears that
nothing was damaged.
>
> The 'scope doesn't seem to work, but I may not know
how to make it work
> yet. It shows "Self Test Complete", but then that
message never goes away.
Have you read the manual? Somehow I suspect not! If it
prints text on the
screen, odds are it's OK.
> I also purchased a 7B85A with manual, and a 7B92A.
The 7B92A was
> delivered, and it had a manual with it, which was a
surprise. But the
> bigger surprise came when the 7B85A arrived without a
manual and turned
> out to actually be another 7B92A. The first 7B92A
that I received was
> actually from the 7B85A auction. Looking more closely
at the auction
> photo shows a 7B92A and manual, with text describing
a 7B85A. The second
> 7B92A was the one I knew I was buying. I now realize
that there is no
> such thing as a 7B85A, only a 7B85. This has had me
confused for several
> days. I now have two working 7B92As. Guess I didn't
need a 7B85A!
For full functionality, you need a 7B87 and one or more
7Axx Vertical
plug-ins. A 7B92A will work, but the A/DS functions will
be limited.
Also, to use the scope's smart functions, you need the
keyboard (or
operate it through the interface).
You really need at very least the User Manual. The4
Service manual is huge
and you probably do not need that.
-John
======================
>
> DaveD
>
>
> On 2/21/2013 10:47 AM, Daniel Koller wrote:
>>
>> Sorry, this begs the question, what are you doing
with a US camera
>> tube in the UK? I'm pretty sure your TV system
was completely
>> different from ours.
>>
>> Dan
>>
>> ________________________________
>> From: Paul Bicknell testeq@...
>> >
>> To: hp_agilent_equipment@...
>>
>> Sent: Thursday, February 21, 2013 12:34 PM
>> Subject: RE: [hp_agilent_equipment] e-Bay "Make
offer"
>>
>>
>>
>> Hi Dave
>>
>> Sorry to hear about the smashed up equipment
>>
>> Could you let the rest of us into the Sellers
Name so that we don't end
>> up
>> with smashed up equipment
>>
>> I recently had a TV camera tube sent from the US
it arrived in tact
>> and the right way up I was lucky
>>
>> Regards Paul B South Coast UK radio@...
>>
>>
>> _____
>>
>> From: hp_agilent_equipment@...
>>
>> [mailto:hp_agilent_equipment@...
>> ] On Behalf Of David
>> Kirkby
>> Sent: 21 February 2013 17:06
>> To: hp_agilent_equipment@...
>>
>> Subject: Re: [hp_agilent_equipment] e-Bay "Make
offer"
>>
>> On 21 February 2013 15:31, Lizeth Norman normanlizeth@...
>>
>> > wrote:
>> > I was pointing out that some sellers are
just complete idiots!
>> >
>> > Snip
>> >
>> > Gala
>>
>> I agree. In fact some of the arguments I've had
with eBay sellers has
>> been down to their total stupidity.
>>
>> I won an auction for an HP oscillator model X.
After the auction the
>> seller tells me he has a model Y, if I would have
prefered that. I
>> looked up the specs of Y, found they were
inferior to that of X, so I
>> said I wanted model X, which was what the auction
was for. So what
>> does the idiot send me? Model Y of course.
>>
>> What I found odd though, is that the stupdity of
these sellers always
>> seems to result in me getting something inferior
to what was
>> auctioned, rather than superior.
>>
>> Packaging seems to be an issue which lets lots of
sellers down. I will
>> not again buy an expensive/heavy bit of test kit,
unless I am sure the
>> seller knows how to package it properly. Here is
how some studid idiot
>> shipped an vector network analyzer from the US to
the UK.
>>
>>
>> ging/badly-shipped-8753A-and-85046A.jpg
>>
>> Needless to say it arrived in the UK quite
smashed up, and the US
>> seller was less than helpful.
>>
>> Dave
>>
>> [Non-text portions of this message have been
removed]
>>
>> [Non-text portions of this message have been
removed]
>>
>>
>
>
>
>
>
>
|
Re: Tek 422 HV power supply issues
A little more investigation showed the blanking levels did not
match the waveform diagrams; putting a meter on the +55 showed
+66, so now it's on to the LV ps.
Anyone have a schematic or link to a 422 AC Only PS? I have
a 016-0072-00 The online manuals I've found so far only seem to have
the AC/DC supply.
And I thought this was just going to be a quick clean up and
toss on the shelf.
Paul
--
Paul Amaranth, GCIH | Rochester MI, USA
Aurora Group, Inc. | Security, Systems & Software
paul@... | Unix & Windows
|
Re: DC504 counter display
You might want to poke around Jameco's site.
-ls-
HankC <hankc918@...> wrote:
toggle quoted message
Show quoted text
Taylor,
Your suggestion of the TI til302 is a good one.
The dimensions & pinout match the ones in the DC504.
The chips are only 1.4 inches thick, which is what I need.
But, this part is obsolete.
I did find some on Ebay but the seller wants $10 each. I though that was a bit pricey.
At a higher sn, Tek changed the displays to MAN3620 but those are obsolete too.
Still looking.
|
Re: DC504 counter display
Taylor, Your suggestion of the TI til302 is a good one. The dimensions & pinout match the ones in the DC504. The chips are only 1.4 inches thick, which is what I need. But, this part is obsolete. I did find some on Ebay but the seller wants $10 each. I though that was a bit pricey. At a higher sn, Tek changed the displays to MAN3620 but those are obsolete too. Still looking. HankC
|
David Hess