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Question Regarding Blanking in HP-1404A/140B

 

Could someone please tell me what a proper blanking signal from an HP-1404A vertical amplifier in an HP-140B should look like?? I took a look at mine (image below) and I'm not sure what I'm seeing is correct.? This was taken when the amplifier is in CHOP mode.

Should the falling part of the waveform be "slow" like that?? I don't think I've ever looked at the blanking signals for any of my scopes so I don't have anything which to reference that and would like to know whether this is correct or indicative of any problems.? I suppose I expected to see more of a pulsed and squarer waveform but maybe not.



Thanks,
Barry - N4BUQ
HP 3585A Early SN info needed

 

I have an early SN 3585A on the bench that is needing calibration after I repaired one of the IF cards. ?This unit uses the original A11, A12, A13 version of the cards. ?everything that I can find from all the usual sources online only gives alignment procedure and schematics for the A17, A18, A19 replacement cards. ?So far queries to Keysight/HP have gone unanswered. ?Would anyone happen to have the alignment info available? ?The card sets are different enough that the procedure in the later manuals makes no sense.
--
Tim Wright
Senior Engineer
Cumulus Media Chicago WLS-AM
AL7DS
Re: Agilent ESA L1500A / E4411A spectrum analyzer password for service menu?

 

-2010 is the password for ESA-E series.


On April 18, 2024 5:23:35 AM UTC, "G H via groups.io" <gkhoefer@...> wrote:
Hello Group,
I recently acquired an Agilent ESA L1500A E4411A spectrum analyzer. And I have a question regarding the service selection on one of the menu options.
And while going through the menus I selected the service choice and it asked for a password. Does anybody know this password? I didn't select anything, I just backed out of this choice.
Nice machine so far. It has options, 1DN, A4H, and A4J.


Thanks in advance.
George

Re: Scan From 1404A Amplifier Manual

 

Perfect! That's what I was looking for.

Thank you again,
Barry - N4BUQ

----- Original Message -----
From: "ChuckA" <chuck@...>
To: "HP-Agilent-Keysight-equipment" <[email protected]>
Sent: Thursday, April 18, 2024 9:10:11 AM
Subject: Re: [HP-Agilent-Keysight-equipment] Scan From 1404A Amplifier Manual
The original picture (original manual) is hard to read also but it
appears to be 8volts.
Try this scan.

Chuck




On 4/18/2024 8:46 AM, n4buq wrote:
Thank you. I can see that one a bit better. I couldn't see the amplitude of
the waveform in picture 4. Do you have the original manual? If so, can you
see the graticule lines in those waveforms? I know it's 2V/DIV but I still
can't tell how much amplitude is shown.

Thanks!
Barry - N4BUQ

--
See Early TV at:

www.myvintagetv.com
Re: New booklet

 

That was an enjoyable booklet.

It should be noted that Advantest made quite a bunch of wonderful test equipment under their original name, Takeda Riken.??

I've got a TR 4172 SpecAn with tracking generator that will likely never function again due to some circuit board rot caused by faulty glue off gassing within some of the RF sections.? Sad too, as it is an amazing performing beastie that is in many ways far superior than even the HP equipment of that era of which it competed.

Oh - and the AI generated kid on the second page after the intentionally blank first page that isn't blank... whew.... disturbing!? He's got some evil pupils, and scope probes that suck blood directly from his wrist! Eww! ;)
[OT] Mi2022E (was Re: New booklet)

 

Sorry for the Off Topic post...? I'll be brief...


Hi Gianni.

A Question if I may, about your Mi2022E...

What firmware does it have installed?? Shown as it powers up on the front panel.

"SOFT.001" mine says.

There is somewhere, some with .003 firmware, we (some of us in the Mi group) are trying to locate.? That allegedly fixes some GPIB issues.? (002 is known to be "not good"...)

Best Regards.

??? Dave 'KBV.


--
Sent from a Micro$oft free zone:
Re: Agilent ESA L1500A / E4411A spectrum analyzer password for service menu?

 

¿ªÔÆÌåÓý

Hi,

?

SYSTEM

MORE 1/3

MORE 2/3

SERVICE

-2010

ENTER

?

?

Yves

De?: [email protected] <[email protected]> De la part de G H via groups.io
·¡²Ô±¹´Ç²â¨¦?: 18 avril 2024 01:24
??: [email protected]
Objet?: [HP-Agilent-Keysight-equipment] Agilent ESA L1500A / E4411A spectrum analyzer password for service menu?

?

Hello Group,
I recently acquired an Agilent ESA L1500A E4411A spectrum analyzer. And I have a question regarding the service selection on one of the menu options.
And while going through the menus I selected the service choice and it asked for a password. Does anybody know this password? I didn't select anything, I just backed out of this choice.
Nice machine so far. It has options, 1DN, A4H, and A4J.


Thanks in advance.
George

Re: Scan From 1404A Amplifier Manual

 

The original picture (original manual) is hard to read also but it appears to be 8volts.
Try this scan.

Chuck

On 4/18/2024 8:46 AM, n4buq wrote:
Thank you. I can see that one a bit better. I couldn't see the amplitude of the waveform in picture 4. Do you have the original manual? If so, can you see the graticule lines in those waveforms? I know it's 2V/DIV but I still can't tell how much amplitude is shown.

Thanks!
Barry - N4BUQ

--
See Early TV at:

www.myvintagetv.com

1404-4.jpg

Agilent ESA L1500A / E4411A spectrum analyzer password for service menu?

 

Hello Group,
I recently acquired an Agilent ESA L1500A E4411A spectrum analyzer. And I have a question regarding the service selection on one of the menu options.
And while going through the menus I selected the service choice and it asked for a password. Does anybody know this password? I didn't select anything, I just backed out of this choice.
Nice machine so far. It has options, 1DN, A4H, and A4J.


Thanks in advance.
George
Re: HP8560a smoke came out

 

¿ªÔÆÌåÓý

The most spectacular line condenser explosions I have ever experienced happened over 50 years ago. I was in high school and worked? at a TV shop. In the summer of 1968, a store told us they had several TVs that were blowing fuses in customer's homes. We picked them up, small B&W consoles, and took them to the shop. I removed the back cover from one, and connected an interlock cheater cord. I was rewarded with an ear-ringing explosion and a shower of aluminum confetti. The bench breaker did not trip because we also repaired window air conditioners and the breaker was 20 amp. We replaced the line condensers in all of the sets with 1000 volt mylar condensers of the same rating after (hopefully!) picking and vaccuming all of the remains of the bad condenser out. A few days later, the manufacturer sent us a letter saying they had gotten a bad batch of condensers and that we should replace any of them we found. Another manufacturer who built a very popular 12 inch portable TV used an under rated condenser in the vertical deflection circuit that would explode frequently. Fortunately, it was easy to turn the set upside down over a trash can and blow the aluminum shards out of it with a vacuum cleaner.

???? Bruce Gentry, KA2IVY



On 4/18/24 0:50, Ed Breya via groups.io wrote:

Totally agree - I've seen enough go bad even in 120V land. Sometimes it's hardly noticeable, with a blown fuse and a burned up part, while in others it makes a huge mess, with melt-downs and severe smoke and goop damage. It's not typically an emergency, but a good idea to get rid of them ASAP. A lot of times I find them in gear I'm fixing for other reasons, and if easy enough to access, I just solder-delete or clip them out and figure on doing replacement later (or never, depending on the deal). If not easy to access and cut out on the spot, I try to make a mental note (yeah right) to remember and deal with it soon. If one burns up, it should never be a surprise.

Ed

Re: Scan From 1404A Amplifier Manual

 

I've been looking for a reasonably-priced original but, so far, haven't found one.? I bought one for the 1421A and it's very nice to have an actual paper manual where the images are readable!

Thanks again,
Barry - N4BUQ

From: "Jeremy Nichols" <jn6wfo@...>
To: "HP-Agilent-Keysight-equipment" <[email protected]>
Sent: Wednesday, April 17, 2024 10:19:43 PM
Subject: Re: [HP-Agilent-Keysight-equipment] Scan From 1404A Amplifier Manual
I have that manual. Let me check.

Jeremy?



On Wed, Apr 17, 2024 at 8:01?PM n4buq via <n4buq=[email protected]> wrote:
Would anyone have the manual for the 1404A 4-channel amplifier plugin?? I would like to see what the waveforms in Fig. 8-25 (Ring Counter Measurement Conditions and Waveforms) look like.? The online versions are pretty poor images and I can't really tell if what I'm seeing - particularly for #4 - are what they should be and a decent picture would really help.

Thanks,
Barry - N4BUQ
Re: Scan From 1404A Amplifier Manual

 

Thank you. I can see that one a bit better. I couldn't see the amplitude of the waveform in picture 4. Do you have the original manual? If so, can you see the graticule lines in those waveforms? I know it's 2V/DIV but I still can't tell how much amplitude is shown.

Thanks!
Barry - N4BUQ

Here are the waveforms you wanted.

Chuck

On 4/17/2024 11:01 PM, n4buq wrote:
Would anyone have the manual for the 1404A 4-channel amplifier plugin? I would
like to see what the waveforms in Fig. 8-25 (Ring Counter Measurement
Conditions and Waveforms) look like. The online versions are pretty poor
images and I can't really tell if what I'm seeing - particularly for #4 - are
what they should be and a decent picture would really help.

Thanks,
Barry - N4BUQ


--
See Early TV at:

www.myvintagetv.com
Re: New booklet

 

Wavetek, Park, EG&G, Stanford....

...and I see a AI image on the cover.?
Re: New booklet

 

Thanks to everybody!

For Marconi, I have in plan the 2022E Signal Generator, which I repaired first when I started again with the solder two years ago.
Re: HP8560a smoke came out

 

Totally agree - I've seen enough go bad even in 120V land. Sometimes it's hardly noticeable, with a blown fuse and a burned up part, while in others it makes a huge mess, with melt-downs and severe smoke and goop damage. It's not typically an emergency, but a good idea to get rid of them ASAP. A lot of times I find them in gear I'm fixing for other reasons, and if easy enough to access, I just solder-delete or clip them out and figure on doing replacement later (or never, depending on the deal). If not easy to access and cut out on the spot, I try to make a mental note (yeah right) to remember and deal with it soon. If one burns up, it should never be a surprise.

Ed
Re: Scan From 1404A Amplifier Manual

 

Here are the waveforms you wanted.

Chuck

On 4/17/2024 11:01 PM, n4buq wrote:
Would anyone have the manual for the 1404A 4-channel amplifier plugin? I would like to see what the waveforms in Fig. 8-25 (Ring Counter Measurement Conditions and Waveforms) look like. The online versions are pretty poor images and I can't really tell if what I'm seeing - particularly for #4 - are what they should be and a decent picture would really help.

Thanks,
Barry - N4BUQ


--
See Early TV at:

www.myvintagetv.com

1404.pdf
1404.pdf

Re: Scan From 1404A Amplifier Manual

 

I have that manual. Let me check.

Jeremy?



On Wed, Apr 17, 2024 at 8:01?PM n4buq via <n4buq=[email protected]> wrote:
Would anyone have the manual for the 1404A 4-channel amplifier plugin?? I would like to see what the waveforms in Fig. 8-25 (Ring Counter Measurement Conditions and Waveforms) look like.? The online versions are pretty poor images and I can't really tell if what I'm seeing - particularly for #4 - are what they should be and a decent picture would really help.

Thanks,
Barry - N4BUQ
Scan From 1404A Amplifier Manual

 

Would anyone have the manual for the 1404A 4-channel amplifier plugin? I would like to see what the waveforms in Fig. 8-25 (Ring Counter Measurement Conditions and Waveforms) look like. The online versions are pretty poor images and I can't really tell if what I'm seeing - particularly for #4 - are what they should be and a decent picture would really help.

Thanks,
Barry - N4BUQ
Re: HP 8568A YTO UNLOCK repair

 

Check the 8568A manual troubleshooting for YTO unlock. It is very good and will isolate it to a component if you follow the tree correctly.
Don Bitters
Re: HP8560a smoke came out

 

¿ªÔÆÌåÓý

Excellent points, Carsten!? However, the collateral damage I was referring to was caused by me rather than by the RIFA caps.? If you're a skilled technician and can replace caps with minimal chance of causing more harm than good (I'm not), knock yourself out.? Probably not being retired yet and not having a lot of free time doesn't help my skill level, in my own defense.? ? ? ? ?Jim



Sent from my T-Mobile 4G LTE Device


-------- Original message --------
From: Carsten Bormann <cabocabo@...>
Date: 4/17/24 9:30 AM (GMT-08:00)
Subject: Re: [HP-Agilent-Keysight-equipment] HP8560a smoke came out

On 2024-04-17, at 14:01, Jim Ford <james.ford@...> wrote:
>
> Definitely if you are in 240 VAC-land replace on sight.? 120 VAC-land -?
> consider the possible collateral damage.

You should always consider the collateral damage.
To do reasonable risk management, you need to understand all of the risks, which includes understanding the risk of collateral damages, but also the failure mode.

The mechanism of this failure mode is not dependent on the voltage supplied (the likelihood of great damage *is*, see below, but not in a very strong way).

It works by first crazing/cracking the encapsulating plastic over time, moisture getting in, and a conductive path being created through the insulating paper.

Now, one of three things can happen with that conductive path:

(1) the resistance is high enough that there is just a bit of local warming, which may even help to expel the moisture a bit over time.? No damages, except for a bit of wasted energy.? The opportunity for moisture ingress does remain, though.

(2) the resistance is low enough that the metallization on the paper (as well as possible the paper itself) burns away locally, thus self-healing the conductive path (metal-paper capacitors were actually designed to do this).? The capacitor degrades, but not in a catastrophic way.? If the capacitor is just used to reduce interference, your instrument may still mostly look fine even after a lot of that continuous degradation.

(3) like (2), except that the plasma generated by the burn-through creates an even more conductive temporary path, consuming more and more energy.
The failure runs away and starts consuming kilowatts out of the high-power AC input.? The resulting explosion from the vapor generated may (a) be innocuous in that the capacitor is mostly gone but there is no other damage [another form of "self-healing"], (b) spew innards of the capacitor (or the module around it ¡ª particularly a problem with Schaffner line filters) all over the instrument making it very hard to clean, or (c) set your lab on fire.? Your AC powerline fuses may also blow and cause a lab power failure (consider yourself lucky, as this makes 3c less likely).

Since line filters are often placed in front of the power switches, (3) might happen even when the device is switched off.

You don¡¯t want to have a (3b) and certainly not a (3c), which is why you do want to replace those RIFA caps.? The runaway case is more likely with higher line voltages (*).? It is also more likely if you take an instrument out of unpowered storage (unless that was in very dry air).

Gr¨¹?e, Carsten

(*) Note that this has nothing to do with the voltage rating of the capacitor ¡ª that is typically 250 V because higher AC voltages are uncommon in the AC mains for these instruments, but the capacitor is designed anyway to take much higher voltages than this nominal value.
Replacing it with a similar capacitor rated at 275 V does not really do anything.
For a replacement, you want a modern, (usually metal/foil based), securely encapsulated (moisture-resistant) capacitor from a reputable source.? E.g., WIMA builds those capacitors, even in metal-paper construction, but it also has built questionable metal-paper capacitors before, so looking at the company name alone doesn¡¯t help.
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