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Date
Re: Probe Cables for 16801A Logic Analyser

 

eBay have got some very weird rules lately. They also have problems shipping to Germany.
?
Global were able to relist the items for me under a different heading and got eBay to list it for me (these were for 100mm ground leads, not something that needs CE marking) but it was still pretty expensive. I used MyUS.com instead as an experiment but it turned out even worse. I think the problem is that ebay also use a reshipper (Pitney Bowes) and there is the cost of shipping from the seller to pitney bowes, the cost of processing the package (opening and repackaging to check it is as declared) and the cost of prepaying any duty and VAT to avoid a collection fee at the UK end as well as the actual shipping.
?
Global made a mistake. They sent me two ground leads instead of two packs. So for my ?76 I got 2 ground leads (the one from breakout pod to ground, not the short one from a single-signal termination housing to local signal ground). I was concerned that MyUS.com had dropped them on the floor, but that seemed unlikely given how they were packaged, and Global readily agreed that their packer had misunderstood. They immediately sent the missing leads by letter post at a cost of a couple of dollars, which is why I'm happy with them.
?
But ebay suck. I hope they lose a ton of sales with this crazy system.
?
?
Re: Introduction

 

Ok. I remember that, now.

Clearly, I need to find my copies of "The Past Through Tomorrow" and "Time Enough for Love" and re-read them. I particularly need to re-read the chapters in TEFL entitled "Excerpts from the Notebooks of Lazarus Long", which Heinlein used as a vehicle to collect random pieces of his wisdom, right or wrong. "Specialization is for Insects" has always been my favorite quote.

DaveD
KC0WJN

Thanks for all the fish.
==============================
All spelling mistakes are the responsibilty of the reader (Rick Renz, STK, ca. 1994)
==============================

On Sep 22, 2024, at 00:57, David C. Partridge via groups.io <david.partridge@...> wrote:

?And the final part of the challenge response is "Not while the evil days come not." So the full Howard challenge/response went:

Caller: Life is short.

Responder: But the years are long.

Caller: Not while the evil days come not.

D.
-----Original Message-----
From: [email protected] <[email protected]> On Behalf Of Dave Daniel
Sent: 21 September 2024 15:14
To: [email protected]
Subject: Re: [HP-Agilent-Keysight-equipment] Introduction

....but the years are long.

I almost missed that. Another "like the hot kiss at the end of a wet fist" moment.


DaveD
KC0WJN
Re: Introduction

 

And the final part of the challenge response is "Not while the evil days come not." So the full Howard challenge/response went:

Caller: Life is short.

Responder: But the years are long.

Caller: Not while the evil days come not.

D.

-----Original Message-----
From: [email protected] <[email protected]> On Behalf Of Dave Daniel
Sent: 21 September 2024 15:14
To: [email protected]
Subject: Re: [HP-Agilent-Keysight-equipment] Introduction

....but the years are long.

I almost missed that. Another "like the hot kiss at the end of a wet fist" moment.


DaveD
KC0WJN
Re: HP 8566B Not Showing Any Signal

 

Tomorrow I'm going to pull the attenuator out of my spare 8566B, and hopefully, it will work better.
Re: HP 8566B Not Showing Any Signal

 

Made some progress tonight. I bypassed the attenuator and ran the -10dB Cal source directly into where the output of the attenuator connects (sorry, I don't remember what that's called). We're getting a signal on the scope now, which is some progress! Here's a video showing how it's going. I'm curious why I have so many harmonics of the signal...it almost seems like something a square wave would have. And the ~80MHz signal that is ALWAYS there is intriguing.?
Re: Probe Cables for 16801A Logic Analyser

 

Global cant ship to the UK due to Ebay rules apparently, but I can buy off their website without any problems
Re: HP 8568A Spectrum Analyser not booting up. Both INSTR CHECK Leds on

 

The first thing I would check is the bus cable connecting the two boxes. Then, I would verify that all the power supplies are working.
?
If that doesn't help, I would re-seat the boards in the processor cage. It might help to find out if yours really is a 8568A. It may have been converted to a "B". The "A" has a separate memory board, while the "B" has memory on the processor board. If it is an "A", check also the NiCd battery pack which usually leaks and does some damage. The service manual has useful information regarding the two Check LEDs.
?
Vladan
Re: HP 8568A Spectrum Analyser not booting up. Both INSTR CHECK Leds on

 

? Hi,

If both LED remain on then you probably have a problem in the A15 processor board in the RF unit. If you have not already done so you'll need to download (purchase) the service manual set from

Regards

Lou
VK3ALB


On Sun, Sep 22, 2024 at 8:01?AM azpo1928r via <azpo1928r=[email protected]> wrote:
Hi everyone. I bought a broken HP 8568A for dirt cheap.
?
The display part works (test pattern can be displayed properly) but i can't get it to boot.
?
Both INSTR CHECK leds are on and never shut off.
?
The only sign of life i get outside the test patterns is a line appearing whenever i push the INSTR PRESET,
?
Has anyone here experienced something similar ? Any ideas?
?
Thanks
HP 8568A Spectrum Analyser not booting up. Both INSTR CHECK Leds on

 

Hi everyone. I bought a broken HP 8568A for dirt cheap.
?
The display part works (test pattern can be displayed properly) but i can't get it to boot.
?
Both INSTR CHECK leds are on and never shut off.
?
The only sign of life i get outside the test patterns is a line appearing whenever i push the INSTR PRESET,
?
Has anyone here experienced something similar ? Any ideas?
?
Thanks
Re: HP 8566B Not Showing Any Signal

 

I am going to try and bypass the attenuator with a 10dB fixed attenuator and see if I¡¯m able to pass signal through the RF input.
?
Also of note, I no longer hear the mechanical clicks as I adjust the attenuator control on the front panel. Either I buggered something up during tear down and reassembly, or the pin on the attenuator press on connector that was flattened was indeed supposed to be flattened.?
Re: Probe Cables for 16801A Logic Analyser

 

Thanks for the correction Mark.
You're right, it's the 50 pin connector - it fits my 16555 - 557.?
I was careful to avoid the ones with 40 pins each end (suits the 1650) but hadn't appreciated the 50/60 options.
?
Re: 8566B 85660-60206 Main Coil Driver C7 Tantalum replacement

 

The reason there was a tantalum in that place has to do with its small size when compared to an electrolytic. Don't bother looking for a tantalum replacement and keep the same capacitance value. It always helps to use the highest voltage and temperature rating you can fit into the space.
?
Vladan
8566B 85660-60206 Main Coil Driver C7 Tantalum replacement

 

I'm in the process of overhauling a 8566B Spectrum analyzer. Some of the boards have the non mil spec wet slug tantalums that are leaking and corroding from the rubber

end seals and I am looking for some input on replacing them.


I have seen in some internet pictures, the 85660-60206 Main Coil Driver in particular, where the C7 cap has been replaced with an electrolytic.

But I have been unable to find anything in the available service manuals as to whether or not the value was changed.


I remember reading on here where one mentioned that when replacing Tantalums with electrolytics that the capacitance value may have to be increased? I have attached

a 2 pictures of late model revisions of this board which have the C7 cap as an electrolytic. It appears to be a HP original as the date code matches the same era as

other parts on the board, however I am unable to make out the value of the cap installed. It appears to possibly be a Nippon Chemi-con SME/SMC series and I see

that same brand marking/color in many of my other late model HP equipment so that is what leads me to believe they are HP originals.

Does anyone have any notes or info of HP making this change and if it would be safe to?

replace the original 10uf/60v Tant with a modern 10uf electrolytic? All the manuals I've found still show it as a 109D tantalum.

I have a few 109D caps in this 8566B and also in a 8673B, all seem to be in the YIG circuits where they have leaked causing pcb corrosion and started to eat away component leads.

Just looking for some guidance as to replacing.

?
Re: HP 5086-7906 YTO

 

¿ªÔÆÌåÓý

Hi Adri,

?

Glad to hear you finally managed to get that 8595E back up and running.

?

As for the software, I wrote it in vb.net. It only does basic tests:

?

Flatness test and save calibration constants table on demand (12MHz-6.5GHz).

Low frequency flatness test only, no calibration constants (9kHz - 10MHz).

DANL resBW=1kHz test

DANL resBW=30Hz test for option 130

?

I will add more tests soon.

This utility saves me time, because everything can be done manually.

?

Yves

De?: [email protected] <[email protected]> De la part de alfa beta
·¡²Ô±¹´Ç²â¨¦?: 21 septembre 2024 12:15
??: [email protected]
Objet?: Re: [HP-Agilent-Keysight-equipment] HP 5086-7906 YTO

?

Yves, your mention about the SW related to the flatness test is interesting. Is it software written by you or does it exist on the market?
As for my 8595E I suspected that the intermittent spikes could originate from the somewhat chaotic way in which I had restored the path of the various? front-end cables
After? extracting the entire front-end section?I reinserted it, paying attention to establishing cable paths as orderly as possible
Once the work was finished suspence:??the spikes were no longer there? ! ; I re-ran then the calibrations routines (AMP; FREQ; SYTF and MXR) and and all ended without problems

?fingers crossed
For fun I tested with the Tracking Gen some coaxial cables (with relative N connectors/adapters) of various qualities and lengths. I attach the images ( vertical scale is 1dBm/div, and?testing is done?sweeping the entire frequency range of the tracking gen i.e. 9kHz - 2.9GHz)
?

Adri

?

?

?

?

----- Messaggio originale -----

Da: Yves Tardif via groups.io <yves_tardif@...>

Rispondi a: <[email protected]>

Inviato: 20/09/2024 01:15:13

Oggetto: Re: [HP-Agilent-Keysight-equipment] HP 5086-7906 YTO

Hi Adri,

?

Yes, I am curious, you can send me a video on the intermittent noise problem, by going through OneDrive for example, or Dropbox.

It could be that one of the PLLs is the cause.

?

For the 8595E on which I was trying to repair, the problem was not on the 130 option as the error message seemed to indicate, but rather an incorrect alignment on the basic filters.

The AMP CAL stopped because it was unable to find the two -3dB points of a filter.

?

Yes, I realigned all the filters following the procedure in the service manual.

There are 4 crystal filter sections and 4 LC filters.

Simple procedure but a bit long, and you must not make any mistakes, otherwise you have to start from the beginning.

I did the job slowly; everything went well and the original problem was solved.

I recalibrated the instrument and took the opportunity to improve my software for flatness alignment, now after the test, all data is entered automatically...which speeds up the work.

?

In my opinion, someone opened this 8595E to try to make a repair, the second converter had been opened, 2 screws were missing and 2 others were reset to 50%.

I had to realign the second converter after closing it correctly.

?

For the filter section, it is clear that one touched the adjustments, because half were well aligned, and for the others, the adjustments were very far from the optimal value.

?

In total, 8 screws were missing on this instrument.

Probably an interrupted repair¡­

?

Yves

?

De?: [email protected] <[email protected]> De la part de alfa beta
·¡²Ô±¹´Ç²â¨¦?: 19 septembre 2024 09:07
??: [email protected]
Objet?: Re: [HP-Agilent-Keysight-equipment] HP 5086-7906 YTO

?

hello Yves, great repair that of the opt 130
In my case the opt 130 has always worked well and I have never needed to study it in detail
Did you do the realignment by adjusting the trimmers on the board itself?
The adventure with my 8595E continues
To sum up, after my last email I focused on a more accurate and uniform alignment of the SYTF. With the help of the microscope, a strong light source, a precision power supply and a fairly reliable frequency source I obtained an insertion loss as per the attached excel file
After reassembling the RF front-end everything worked fine again, including the MXR CAL routine that?used to?give the?error? "insufficient harmonics"
When I moved from the "messy" version (pic)? reinserting everything into its space (which is very crowded, also due to the existence, in my case, of the tracking gen)?and connected?the SA input to CAL OUT I observed a type of intermittent noise, in the form of spikes of intensity about -60dBm that appear and disappear in the area of ??the highest harmonics (I already checked the?CAL OUT signal; it?is clean and fine)
Now I think I will have to re-disassemble the front-end (ouch) and try to understand from where does this noise originate :-(?

If you are interested I?can send you a short video of the problem (don't think I?can post videos here)
Thanks for asking, Yves
Adri

?
HP8360 Synth sweeper, test fails, but no apparent problems in output signal

 

Hello,
?
I'm trying to figure out some strange things with my 83630A synthesized sweeper.?
?
I get fail on the following self tests:
A12 (SYTM Driver)
166 Offset DAC
167 Slope DAC
168 VComp summer
177 YTF Offset DAC
178 YTF Slope DAC
179 YTF VComp summer
?
RF
269 LO Band locked check
?
Sometimes, there are fails reported on A4 (Frac N) also, but currently not.
?
Now that CLIPs are available there is a fair chance to fix this I hope.
?
My problem, though, is that I can't see any problem in the output signal.?
Output power level is stable and harmonics seem to be suppressed over the complete frequency range -> A12 seems to be operating.
I can measure a 100 MHz (LO band?) signal at correct frequency and level -> LO band locked?.
?
Looking at the schematics, it seems like the signal VCOMP is passed to the Analog bus (Q in the schematic for A12), which should enable testing of these signals.?
It seems a little unlikely that both DACs on A12 (U23/B and U9/D) should break at the same time while still enabling 'full' functionality??
?
Suspecting the ADC section on the CPU board (N), I tried to connect to TP12 (MUX OUT) only to find that loop at the top of the board was cut away and the trace leading to U58 (OP AMP before ADC) was cut and sealed - really making sure TP12 would be inaccessible. The edge of the board was marked with blue paint in this area also.
?
Anyone has a clue why TP12 should not be accessible (looks like fix from the factory) or even has the same board and fix (08360-60215)?
?
Any comments on the fails would also be very much appreciated.?
?
Any details about what the different self tests really do would be very interesting to know.
?
Regards,
? Staffan??
?
Re: Probe Cables for 16801A Logic Analyser

 

Careful on that first link for ebay item #395285104946.? Although it's a "40-pin cable" on the probe side, the chassis-side connector is not compatible with the 16801A.? There are a lot of different flavors of 40-pin cable, hence the compatibility table previously mentioned.
?
Keith has some really nice closeup photos of the connector on the required 16715-61601 cable:
?
?
?
It might be the most common type out there, but the others are out there too.
?
-mark
?
?
On Fri, Sep 20, 2024 at 08:38 PM, Adrian Godwin wrote:

...
?
If you are patient you may be able to find them much more cheaply. I've paid as little as ?3 for a grabber set and ?50 for a 16700A - it was broken, but had useful parts including 3 capture boards with those ?60 cables. Both at radio amateur boot sales. However if you only want 32 inputs even ebay may not be too bad.
?
- sold last week but only ?22
and the same seller has for ?25 which adapt the 40 pin connector to a 20 pin header that is easy to design into a prototype. These adapters include the termination network that's a part of the grabber loom.
..
Re: Introduction

 

On Sat, Sep 21, 2024 at 10:22:00AM +0100, Dave_G0WBX via groups.io wrote:
Delphi was very popular in Europe, Germany especially.

There is also (previously? mentioned in another thread) EZGPIB, that is a
Pascal based scripting system, for GPIB instrument/device control.
I believe that was probably created with Delphi.
This sparked a thought and looking I see that there are two libraries for
interfacing with GPIB available for TCL., GPIB-Tcl and GPIB-tclsrq. The
latter supports callbacks on SRQ events and is more object oriented.
It may work on Windows, but it's probably more oriented toward Linux/Unix
systems.

Tcl is still my favorite scripting language having written everything in it
up to full blown cross platform applictions. Despite lack of fanfare, it's
still in wide use.

Paul

--
Paul Amaranth, GCIH | Manchester MI, USA
Aurora Group of Michigan, LLC | Security, Systems & Software
paul@... | Unix/Linux - We don't do windows
Re: HP 8554B, no RF after first successful run...

 

Well shucks


On Sat, Sep 21, 2024, 1:36?PM Steve - Home via <sw.krull=[email protected]> wrote:
For the x1 and x100 ohm ranges the 260 outputs 1.5 vdc, on the x10000 it outputs 9vdc! On the x1 range the short circuit current is 125 ma, on the x100 it¡¯s 1.25 ma, on the x10000 it¡¯s 75 ua. Danger, Will Robinson, danger!

Steve



On Sep 21, 2024, at 8:37?AM, Bill Berzinskas via <bberzinskas=[email protected]> wrote:

?
Its a simpson 260, open to hearing any tips before i go in!

On Sat, Sep 21, 2024 at 10:57?AM Dave Wise via <d44617665=[email protected]> wrote:
Some analog VOMs put out enough current to fry a mixer diode.
From: [email protected] <[email protected]> on behalf of Bill Berzinskas <bberzinskas@...>
Sent: Saturday, September 21, 2024 7:48 AM
To: [email protected] <[email protected]>
Subject: Re: [HP-Agilent-Keysight-equipment] HP 8554B, no RF after first successful run...
?
I did re-check, and I've since gotten more?problems in?this?area...? ? ? :-D? -10v supply is no longer happy..??
Lot of people saying it might be the mixer diodes, so I may check those w/ my old analog meter today after I look?
over MORE POWER SUPPLIES....? ??

On Sat, Sep 21, 2024 at 5:27?AM Martin via <musaeum=[email protected]> wrote:
Hi Bill,
?
When I first read your post I thought you did some very low frequency stuff.?
Actually you're referring to MHz (Megahertz), not mHz (Millihertz).
?
Since you left the unit running for a while until the fault condition appeared: did you re-check once it was cold again? Like after 24 hours?
?
cheers
Martin
Re: HP 8554B, no RF after first successful run...

 

¿ªÔÆÌåÓý

For the x1 and x100 ohm ranges the 260 outputs 1.5 vdc, on the x10000 it outputs 9vdc! On the x1 range the short circuit current is 125 ma, on the x100 it¡¯s 1.25 ma, on the x10000 it¡¯s 75 ua. Danger, Will Robinson, danger!

Steve



On Sep 21, 2024, at 8:37?AM, Bill Berzinskas via groups.io <bberzinskas@...> wrote:

?
Its a simpson 260, open to hearing any tips before i go in!

On Sat, Sep 21, 2024 at 10:57?AM Dave Wise via <d44617665=[email protected]> wrote:
Some analog VOMs put out enough current to fry a mixer diode.
From: [email protected] <[email protected]> on behalf of Bill Berzinskas <bberzinskas@...>
Sent: Saturday, September 21, 2024 7:48 AM
To: [email protected] <[email protected]>
Subject: Re: [HP-Agilent-Keysight-equipment] HP 8554B, no RF after first successful run...
?
I did re-check, and I've since gotten more?problems in?this?area...? ? ? :-D? -10v supply is no longer happy..??
Lot of people saying it might be the mixer diodes, so I may check those w/ my old analog meter today after I look?
over MORE POWER SUPPLIES....? ??

On Sat, Sep 21, 2024 at 5:27?AM Martin via <musaeum=[email protected]> wrote:
Hi Bill,
?
When I first read your post I thought you did some very low frequency stuff.?
Actually you're referring to MHz (Megahertz), not mHz (Millihertz).
?
Since you left the unit running for a while until the fault condition appeared: did you re-check once it was cold again? Like after 24 hours?
?
cheers
Martin
Re: HP-IB connector screws

 

?L-Com has the IEEE-488 jack screws:



Price is not too bad, but you have purchase packs of 20 or 100.
?
George
4561 - 4580 of 151492