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HP Infinium 54845A strange issue, need advice

 

I've got an older HP branded 54845A which was failing several tests and all calibrations. I have fixed everything up. Replaced the hard drive with a compact flash, fresh install of the software and all the upgrades up to V4.5 and added memory (64MB now from 16MB before). Cleaned up the ADC ASICs and replaced an on board regulator chip and a couple of capacitors (on acquisition board) and now the scope passes all self tests (multiple times), passed all calibrations and everything is honky dory except a peculiar issue that was also there in the beginning when I got the scope (it was win95 and SW V3.72)
As you can see in the pictures, when the graphic display is enabled, all is fine and the scope works perfectly as far as I can tell. As soon as I disable the graphic display (top right corner) the waveform is cut into pieces as you can see. The issue is very visible on fast time bases but it also exists on slow time bases specially with low frequency square wave it is very visible.?
I cannot figure out what can be wrong with it. I don't think it is the acquisition board. When I got the scope I thought it was a software/driver issue so I replaced the clunky noisy hard drive and upgraded the software but the problem persists. The only hardware issue I can think of is the display board on the PCI slot but what is in there to test?
Has anybody else experienced this issue?

02.jpg

Re: Has anyone got the specifications of the HP/Agilent 04285-61001 100-ohm resistor used with 4285A precision LCR meter?

Dr. David Kirkby from Kirkby Microwave Ltd
 

In case it helps, I attach a picture of the meter and resistor.

On Sun, 30 Sep 2018 at 20:40, Dr. David Kirkby <drkirkby@...> wrote:
The 4285A precision LCR meter, which has a basic accuracy of 0.1%, was supplied with a 100-ohm resistor as a standard accessory. It is used when calibrating the instrument with extension cables (1 m or 2 m). Does anyone know the specifications on that resistor?

I have a 4285A and the resistor. If the resistor is connected to the front of the instrument, with all corrections off, the instrument reads about 100 ohms, but obviously, there's some variation with frequency.

100 kHz. |Z| = 99.6846 ohms, phase = -0.178 degrees
300 kHz. |Z| = 100.011 ohms, phase = 0.022 degrees
1 MHz. |Z| = 99.9107 ohms, phase = 0.007 degrees
3 MHz. |Z| = 99.9250 ohms, phase = 0.028 degrees
10 MHz. |Z| = 100.062 ohms, phase = 0.036 degrees
30 MHz. |Z| = 101.260 ohmz, phase = -0.128 degrees
?
I have no idea if these figures are to be expected or not.

--
Dr David Kirkby Ph.D C.Eng MIET
Kirkby Microwave Ltd
Registered office: Stokes Hall Lodge, Burnham Rd, Althorne, CHELMSFORD, Essex, CM3 6DT, United Kingdom.
Registered in England and Wales as company number 08914892

Tel 01621-680100 / +44 1621-680100



--
Dr David Kirkby Ph.D C.Eng MIET
Kirkby Microwave Ltd
Registered office: Stokes Hall Lodge, Burnham Rd, Althorne, CHELMSFORD, Essex, CM3 6DT, United Kingdom.
Registered in England and Wales as company number 08914892

Tel 01621-680100 / +44 1621-680100

4285A-with-100-ohm-resistor-at-1-MHz-low-res.jpg

E4406A GPIB errors with KE5FX utilities

 

If I fire up my E4406A and issue an SCPI control string to it, then capture a spectrum and request a GIF grab using PSAPLOT, it works fine the first time.? Subsequent use of the same command result in a read error 0x2.? I can't find any commands which will reset the thing.? If I power-cycle the 4406 and run the SCPI config string again (or set it up manually), the same thing happens, first read to GIF is fine, subsequent ones fail.? Using a Prologix USB GPIB interface v6.4.1 with driver v6.107.? It works fine with all my other GPIB instruments.? I have now isolated the 4406 so it is the only device on the GPIB. No change.

SATRACE and SSM also fail with the 4406, either locking up or reporting an 0x2 read error.

Any suggestions of what to look for, any diagnostics to try, or if the E4406A needs any special config settings in PROLOGIX.EXE?? The backlights have failed, so seeing what is on the display is challenging, and I certainly can't just take a snap of the screen.
Neil

C:\Program Files (x86)\KE5FX\GPIB>psaplot 19 a.gif
Connected to Hewlett-Packard,E4406A,US40061883,A.04.21? ?20000921? 10:42:11
?
Done, 15372 bytes written to a.gif
?
C:\Program Files (x86)\KE5FX\GPIB>psaplot 19 b.gif
Connected to Hewlett-Packard,E4406A,US40061883,A.04.21? ?20000921? 10:42:11
?
Read error 0x2, cnt=0
?(Communications error)
?
?
Re: External display for Hp 4145a

 

Thanks for the input, l think this helped me to get on the right track. looks like the cheapest way might be to get an old vector scope off eBay and operate it in x-y mode. Small display though. Are there any old ones that have a larger display than 5"? Thanks, Robert, for those references. Love the LCD version but given I got the 4541a for $150 it blows the budget. Or i get a parts unit with working display but so far no luck for reasonable price.

Thanks?
Has anyone got the specifications of the HP/Agilent 04285-61001 100-ohm resistor used with 4285A precision LCR meter?

Dr. David Kirkby from Kirkby Microwave Ltd
 

The 4285A precision LCR meter, which has a basic accuracy of 0.1%, was supplied with a 100-ohm resistor as a standard accessory. It is used when calibrating the instrument with extension cables (1 m or 2 m). Does anyone know the specifications on that resistor?

I have a 4285A and the resistor. If the resistor is connected to the front of the instrument, with all corrections off, the instrument reads about 100 ohms, but obviously, there's some variation with frequency.

100 kHz. |Z| = 99.6846 ohms, phase = -0.178 degrees
300 kHz. |Z| = 100.011 ohms, phase = 0.022 degrees
1 MHz. |Z| = 99.9107 ohms, phase = 0.007 degrees
3 MHz. |Z| = 99.9250 ohms, phase = 0.028 degrees
10 MHz. |Z| = 100.062 ohms, phase = 0.036 degrees
30 MHz. |Z| = 101.260 ohmz, phase = -0.128 degrees
?
I have no idea if these figures are to be expected or not.

--
Dr David Kirkby Ph.D C.Eng MIET
Kirkby Microwave Ltd
Registered office: Stokes Hall Lodge, Burnham Rd, Althorne, CHELMSFORD, Essex, CM3 6DT, United Kingdom.
Registered in England and Wales as company number 08914892

Tel 01621-680100 / +44 1621-680100
Re: External display for Hp 4145a

 

The easyist way to do this is to use a PC based 'scope. Most will run X-Y mode. A cheap USB one from ebay or even just a soundcard input and software

A Raspberry Pi will do it too


More informtion than you will ever need


Robert G8RPI.
Re: External display for Hp 4145a

 

¿ªÔÆÌåÓý

Well, Newscope makes a retrofit LCD which also gives VGA output to a modern display. ?So you replace your 1345A display with the LCD kit and get VGA output as well.? I did this on my 3562A DSA (had a dying display) which uses the same display module as the 4145A.

?

?

Shaun M

?

From: [email protected] <[email protected]> On Behalf Of kleinwaechterj via Groups.Io
Sent: September 29, 2018 14:44
To: [email protected]
Subject: [HP-Agilent-Keysight-equipment] External display for Hp 4145a

?

Hi,
I own an old Hp 4145a semiconductor analyzer. The display unit has x-y-z analog outputs (1V p-p) that can be used to connect x-y displays like an oscilloscope. Is there any way (at reasonable cost & effort) to convert these signals so I can connect an old video monitor, either b/w video signal or a cheap old color monitor ?
Is anyone out there doing this ?
Thanks
Jk

Re: External display for Hp 4145a

 

On 09/29/2018 04:43 PM, kleinwaechterj via Groups.Io wrote:
I own an old Hp 4145a semiconductor analyzer. The display unit has x-y-z
analog outputs (1V p-p) that can be used to connect x-y displays like an
oscilloscope. Is there any way (at reasonable cost & effort) to convert
these signals so I can connect an old video monitor, either b/w video
signal or a cheap old color monitor ?
Is anyone out there doing this ?
None that I've heard of. You'd basically need a vector-to-raster
converter, which would digitize and draw the vectors into a framebuffer
which is simultaneously read out to a raster display, cheap or
otherwise. This is not a trivial conversion.

The 4145 is a highly capable and versatile instrument; the display it
uses is also used in many other instruments, and is well-documented.
You might be able to repair the display or find a donor instrument to
take a display from, assuming you're looking to do this due to a display
failure.

-Dave

--
Dave McGuire, AK4HZ
New Kensington, PA
Calibration of 4285A Precision LCR meter 75 kHZ to 30 MHz. 0.1%

Dr. David Kirkby from Kirkby Microwave Ltd
 

I bought a 4285A which arrived today. I downloaded the last calibration document on the instrument from 2012.?
(It is handy being able to do this, even if you did not pay for the calibration.)

If was received at Agilent in spec and left in spec. But several things don't make sense to me:

1) The resistor, 04285-61001, which is one of the accessories supplied with a new 4285A, and used at various points for lead length correction, was not listed on the calibration certificate. I would assume, that since the resistor is supplied with the meter, and needed for correct operation of the meter, its calibration would be checked. But I don't see that listed.??

Maybe the resistor was not returned.?

2) The calibration certificate lists under "Calibration Equipment Used", a 42030A Standard Resistor Set. But there is not a single result on the calibration certificate for any of the resistors in that kit, which range from 1 milli ohm to 100 k ohm. There are plenty of results from the capacitor set used.?

3) The calibration certificate makes reference? to a "20 cm AIR LINE", but it is not listed in the "Calibration Equipment Used.?


I just paid $1650?for the 4285A on eBay, so I will send to Keysight for calibration. It is too much money to risk getting a duff instrument. The calibration cost is quite modest.?

Dave.?
Re: HP8903B just acquired - how to quickly test it

 

Ok,

many thanks to all for the help.

1) No battery. Ok, a thing not to worry about. So far, problem never happened again

2) Filters. Good to have especially the 400Hz for radio use as I read around. Not sure what to do with CCITT tough.

2) I executed the test described in the manual and most of the stuff is within specified values so it seems okay with the exception of the point 9:

Following the procedure of the Preliminary Check in the Basic Functional checks? (Page 3-12 onwards) I noticed the following:

??? - At point 9. there is no drop in the ratio when Keying 47.0 SPCL:

"Point 9:
Key in 5.0 SPCL to measure ac level again with the rms-responding detector. Set impedance by 600Ohm by keying in 47.0 then pressing the SPCL button. The SPCL key light should extinguish. The right display should drop by approximately .6% (down to approximately 99.4%)"

Now, at the beginning of point 9 the display is 100.1% and after point 9 is 100.0%. I assume this is okay.


3) I still need to open it to visually inspect for leakage and so on. Will report any progress. It seems that the only caps that "should" proactively changed are C2 and C3 on A3 board, everything else only following inspection or deviation from specs. Any suggestion here?

4) I would like to use Peter Millett's software but I am stuck with which GPIB card to buy. I would like to use USB one, but they are pricey and it seems that not all of them works. Could someone point me to something reasonably priced, USB and possibly not requiring XP style laptops? I have other HPIB gear, but this should mainly serve the purpose to automate the 8903B.
Thanks in advance.

Giuseppe Marullo
IW2JWW - JN45RQ
External display for Hp 4145a

 

Hi,
I own an old Hp 4145a semiconductor analyzer. The display unit has x-y-z analog outputs (1V p-p) that can be used to connect x-y displays like an oscilloscope. Is there any way (at reasonable cost & effort) to convert these signals so I can connect an old video monitor, either b/w video signal or a cheap old color monitor ?
Is anyone out there doing this ?
Thanks
Jk
Manuals Free For postage

 

I have the following original paper manuals "free" for postage

1) 435A "OPERATING INFORMATION"? #00435-90006, (no service info), $1.75 USA / $5 non USA
2 11693 LIMITER, Operating and Service #11693-90004, $1.50 USA / $4 Non-USA

Replies OFF LIST ONLY,?? ..FCFS

Dave
manuals@...

--
Dave
Manuals@...
www.ArtekManuals.com
Re: Hp 8753D options

Dr. David Kirkby from Kirkby Microwave Ltd
 



On Sat, 29 Sep 2018, 01:41 bownes, <bownes@...> wrote:

Oh wise ones,

I had to do some work on my trusty 8753d, sn 3410J02072 and it has forgotten that it had options 010 and 002. Can anyone point me at a source for getting the codes?

Note: this is for personal, non commercial use!

Thanks!
Bob
KI2L


Dave.
Re: Hp 8753D options

Joel Lebon
 

Hello dear OMs,

here are the changes I made on my hp 8753d to put it in full options.
there is a bit of work but it is worth it!
have a good day

Joel ON4LJ

PS: see attachment


On the hp_agilent_equipment list, someone listed the changes needed to add
Options 010, 006, and 002 to any 8753B (and probably other 8753¡¯s as well).

The steps are:

1. Remove U23, a Xicor X2816BP-20 EEPROM, from the A9 CPU Board.
2. I installed a socket but probably not needed. It¡¯s a DIP 24 pin,
0.6 spacing chip.
3. Read the chip on a chip programmer.
4. Archive the file for reference.
5. On the very bottom line of the file, at address 000007F0: find
entries 00 00 00 F2 F2 F2 3x 3x 3x 3x 41 3x 3x 3x 3x 3x
6. The ¡®x¡¯ is you serial number. The ¡®41¡¯ is ¡®A¡¯. For mine, with
Option 006 installed, it is 2828A04614
7. For mine, with Option 006, ¡®F2¡¯ is shown three times. To open
Options 010, 006, and 002, change the ¡®F2¡¯ to ¡®F7¡¯ in all three places.
8. Reprogram the chip with the modified file.
9. Probably archive the ¡®modified file¡¯ for reference.
10. Reinstall the chip.

Welcome to all options enabled!

I just did it on mine and, on turn on, it says ¡®INSTALLED OPTIONS: 010,
006, 002¡¯.

-----Message d'origine-----
De?: [email protected]
[mailto:[email protected]] De la part de bownes
Envoy¨¦?: samedi 29 septembre 2018 02:42
??: [email protected]
Objet?: [HP-Agilent-Keysight-equipment] Hp 8753D options


Oh wise ones,

I had to do some work on my trusty 8753d, sn 3410J02072 and it has forgotten
that it had options 010 and 002. Can anyone point me at a source for getting
the codes?

Note: this is for personal, non commercial use!

Thanks!
Bob
KI2L
Re: Hp 8753D options

 

Hi, send me this email to labo21...at.......videotron.ca, maybe I may help
you.

-----Message d'origine-----
De?: [email protected]
<[email protected]> De la part de bownes
Envoy¨¦?: 28 septembre 2018 20:42
??: [email protected]
Objet?: [HP-Agilent-Keysight-equipment] Hp 8753D options


Oh wise ones,

I had to do some work on my trusty 8753d, sn 3410J02072 and it has forgotten
that it had options 010 and 002. Can anyone point me at a source for getting
the codes?

Note: this is for personal, non commercial use!

Thanks!
Bob
KI2L
Hp 8753D options

 

Oh wise ones,

I had to do some work on my trusty 8753d, sn 3410J02072 and it has forgotten that it had options 010 and 002. Can anyone point me at a source for getting the codes?

Note: this is for personal, non commercial use!

Thanks!
Bob
KI2L
Re: Plastic N connector caps?

 

Following up...

I received some samples from Mocap of the two SKUs below.

The RVCC9037-15 is a very good fit for any of the "larger" N male shells. On the smallest sized knurled ones, it's a bit more loose than I would like.

The RVCC-9034-5 is just about a perfect fit for N females.

These are nice flexible black vinyl parts. I don't know whether they pose a static issue or not.

The downside is that they are awfully expensive compared to the other quoted sources, but I suspect the material is more expensive.

John
----

On 09/24/2018 02:48 PM, John Ackermann N8UR wrote:
The RPC series from mocap.com look like a good solution.? The best stocked sizes seem to be:
RVCC9037-15 0.812 ID, 1.000 IL, black, for male N.? Minimum quantity 51 @ $0.4145
RVCC9034-5 0.625 ID, 0.500 IL, black, for female N.? Minimum quantity 100 @ $0.2932.
The 0.812 may be a tiny bit small for the N male, but the next size up is 0.843 which I think would be too big.? And 1.25 might be a better length, but the in-stock choices are 1.0 or 1.5.
Thanks for the lead!
John
----
On 09/24/2018 02:15 PM, STEVE REEVES wrote:
Mocap.com

Steve



Sent from my Samsung Galaxy smartphone.

-------- Original message --------
From: John Ackermann N8UR <jra@...>
Date: 9/24/18 2:03 PM (GMT-05:00)
To: [email protected]
Subject: [HP-Agilent-Keysight-equipment] Plastic N connector caps?

I'm trying to find plastic slip-over covers for N male and N female
connectors.? Searching eBay and Amazon turns up lots and lots of metal
ones, which are pricier than I'd like, and only one type of plastic
cover that slips inside the connector shell rather than over the top.? I
got some of those and they're a pain to use.

Do any of you know a source for the nice black (or red, or whatever)
slightly stretchy covers for both N male and female?? I'd like to get 50
or so for each gender.

Thanks!

John
Re: Harris 6561 256 x 4 bit CMOS RAM

John
 

Rainer,

I'd have to look at the timings to be sure but the HM1-6561B-9 is a faster variant. I have found a site that has some HM1-6561B-9 chips at the $19.00 ea for small quantities so while I can think that is an outrageous price for these chips it is possible to get them in small quantities if I need to. So we will wait until I get the chip I purchased to see if there are any more duds.?
Re: HP 85685A RF Preselector Need CLIPS and Software

 

John,

Thanks for the post.? I did check the site.? There where several repeats of the 85685-90003, 85685-90098, and datasheet which I already had from KS.?

Still looking for Schematics/Service manuals and software.? I ran a search on this site and it looks like others have gone down this route.

I did post the extracted firmware at ko4bb; Hopefully that will help someone in the future - maybe me...

rastro
Re: Harris 6561 256 x 4 bit CMOS RAM

 

¿ªÔÆÌåÓý

Hi John,

what about that?
6561 RAM / HM3-6561-5


QTY 1+? 10+?
Price ea. $3.00 $2.00

73, Rainer

Am 26.09.2018 um 22:38 schrieb John:

Thanks for the encouragement but I do want to keep it original if possible. I have enough to do on the unit to get it back to operational status. Given the size of the board if I wanted to go with the reengineering approach I would just build a replacement RAM board. There is very little else on the board except tri-state latches and buffers. As I said in my original post I have secured 1 NOS chip so as long as it is only 1 dud chip I am good to go. I just wanted to see if anyone knew of a source that catered for small quantity obsolete ICs.

John
VK2DLP

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