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Re: Looking for HP alphanumeric display module 3 digits: 5082-7100 or 1990-0476

 

The one I have is in the same package etc. I actually have two 3 digit ones and a larger one. I'll pull them out and check colour and if CC or CA.

Robert.
Re: Looking for HP alphanumeric display module 3 digits: 5082-7100 or 1990-0476

 

On Mon, Nov 13, 2023 at 02:07 AM, Dave McGuire wrote:
Ooohh! Please post pics of that when it's done.
Nothing fancy, Dave, except it employs a few different HP LED display units that I have waiting for employment: they are the (I think so, at least) HP 5082-7340 single-digit hex displays with the nice dots and rounded edges (HP 5082-7300-like, not seven-segment) for seconds, minutes, hours, date and year, plus one three-digit alphanumeric (5082-7100 or 1990-0476), showing the month in three alpha characters (Jan, Feb, Mar, etc.). Unfortunately, my '7100 is slightly damaged, which is why I'm looking for a replacement.
All this is not at all OT for this group, as I'm sure you'll agree.
So, that's 10 ea. '7340 plus one '7100. There are two rows of characters: The top row shows seconds, minutes, and hours, six digits total, the bottom row shows date, month and year. All that in beautiful red LED dots. The two rows are stacked with single-in-line IC connector pins and sockets, holding the two halves together. Case is two small boxes, the bottom one upside down.
Currently, things are half-finished. I'll post a few pictures some time in the near future.
I find it amazing that these days, a very accurate clock may be built using twelve of these '7300's, one Arduino and one half-a-postage stamp-sized GPS receiving module. No glue logic or the like needed, just a 5V/1A power supply. Actually, I'm using a buck regulator, allowing me to use a wall wart outputting anything from 6V to 12V @ 0.5 to 1A.
The 3 * 5 x 7 display has its own Arduino nano plus buffer/drivers for row scanning, character forming and column filling (very old hat, I love it). Using the clock's Arduino would cause visible interruptions in the row scanning, even when using interrupts, because of the amount of processing needed to prepare digits from the GPS' filtered NMEA telegrams, taking DST and UTC deviation into account and the processing needed to prepare column information for the alphanumeric part. Still, it needs some C++ programming since the Arduino compiler produces code which is too slow. I'm pretty sure that optimizing and doing just the row-enabling and -disabling under interrupt would be feasible but I decided to make life a bit easier still... As it is, it's two independent units, communicating a one-hex-digit month number.

TBC!

Raymond
Re: Looking for HP alphanumeric display module 3 digits: 5082-7100 or 1990-0476

 

On Mon, Nov 13, 2023 at 08:45 AM, nigel adams wrote:
I think a display like that is used in the HP4275 series impedance analysers...
Unfortunately, no, Nigel. Those are numeric single-digit units in the 4274/75. what I'm looking for is a 3-character alphanumeric unit, containing 3 ea. 5 x 7 matrix layouts:
A photograph (not mine): /g/HP-Agilent-Keysight-equipment/photo/290883/3703502?p=Name%2C%2C1990%2C50%2C2%2C0%2C0

Thanks for helping though.

Raymond
Re: Looking for HP alphanumeric display module 3 digits: 5082-7100 or 1990-0476

 

I think a display like that is used in the HP4275 series impedance analysers...
Hope it helps
Regards
Nigel

Sent from my iPad by banging a nail into a piece of wood...

On 13 Nov 2023, at 01:07, Dave McGuire <mcguire@...> wrote:

On November 12, 2023 4:46:30 PM "Raymond Domp Frank" <hewpatek@...> wrote:
Hi Robert,
Thanks for responding!
It would be great news if your module(s) could solve my problem.
ISTR that HP 1990-numbers are internal references for HP 5082 numbers.
I have placed a photo (not mine, picked from the 'net) of the module I'm looking for.
I'm looking for a functionally identical module with red leds and anodes on rows. Depending on your price, I'm willing to take a chance. I can measure and check colour and connections easily.
This is for a DIY clock that I'm building, using different vintage display modules, so I can modify things if necessary, except outline dimensions and colour to some degree.
Ooohh! Please post pics of that when it's done.

-Dave

--
Dave McGuire, AK4HZ
New Kensington, PA
Re: Readings from 436A power meter using 82357B USB-GPIB?

 

I also have a HP436A and try to make the GPIB work. After search on several websites, I could not find any example, therefore, I spent two days and figured out this problem. Here is the right GPIB command sequence :

?

Interactive Control

Copyright 2022 National Instruments Corporation

All rights reserved.

?

Type 'help' for help or 'q' to quit.

?

GPIB0: ibdev

??? enter board index: 0

??? enter primary address: 13

??? enter secondary address: 0

??? enter timeout: 10

??? enter 'EOI on last byte' flag: 1

??? enter end-of-string mode/byte: 10

?

ud0: ibclr? <----------- use this to turn on remote LED, required.

[0100]?? ( cmpl )

?

ud0: ibwrt "9A+I"? <---- this means: set RF power unit to be W

[0100]?? ( cmpl )

count:? 4

?

ud0: ibrd 14????? <-----read 14 byte data as ASCII

[0100]?? ( cmpl )

count:? 14

50? 4c? 41? 20? 30? 39? 39? 30????????? P L A?? 0 9 9 0

45? 2d? 30? 39? 0d? 0a????????????????? E - 0 9 . .

?

Details about the "PLA" can be found on page 3-19, HP436A operating and service manual.

?

?

I use a NI GPIB-USB-HS adaptor, run on windows 10, with NI VISA (2022) installed.

With NI MAX scanning, I found the address=13 for HP436A.

With NI MAX interactive control, I tried above sequence.

When you implement above sequence with C or python, the timing is important. Between ibclr to ibwrt, it needs about 0.3s, between ibwrt and ibrd, it needs at least 1.2s? (1.2s is the worst case according to the manual).
Lin
Re: Looking for HP alphanumeric display module 3 digits: 5082-7100 or 1990-0476

 

On November 12, 2023 4:46:30 PM "Raymond Domp Frank" <hewpatek@...> wrote:
Hi Robert,
Thanks for responding!
It would be great news if your module(s) could solve my problem.
ISTR that HP 1990-numbers are internal references for HP 5082 numbers.
I have placed a photo (not mine, picked from the 'net) of the module I'm looking for.
I'm looking for a functionally identical module with red leds and anodes on rows. Depending on your price, I'm willing to take a chance. I can measure and check colour and connections easily.
This is for a DIY clock that I'm building, using different vintage display modules, so I can modify things if necessary, except outline dimensions and colour to some degree.
Ooohh! Please post pics of that when it's done.

-Dave

--
Dave McGuire, AK4HZ
New Kensington, PA
Re: Looking for HP alphanumeric display module 3 digits: 5082-7100 or 1990-0476

 

On Sun, Nov 12, 2023 at 10:46 PM, Raymond Domp Frank wrote:
I have placed a photo (not mine, picked from the 'net) of the module I'm looking for.
I'm looking for a functionally identical module with red leds and anodes on rows. Depending on your price, I'm willing to take a chance. I can measure and check colour and connections easily.
Sorry, forgot the link:
/g/HP-Agilent-Keysight-equipment/photo/290883/3703502?p=Name%2C%2C1990%2C50%2C2%2C0%2C0
Re: Looking for HP alphanumeric display module 3 digits: 5082-7100 or 1990-0476

 

Hi Robert,
Thanks for responding!
It would be great news if your module(s) could solve my problem.
ISTR that HP 1990-numbers are internal references for HP 5082 numbers.
I have placed a photo (not mine, picked from the 'net) of the module I'm looking for.
I'm looking for a functionally identical module with red leds and anodes on rows. Depending on your price, I'm willing to take a chance. I can measure and check colour and connections easily.
This is for a DIY clock that I'm building, using different vintage display modules, so I can modify things if necessary, except outline dimensions and colour to some degree.

Raymond
Re: Looking for HP alphanumeric display module 3 digits: 5082-7100 or 1990-0476

 

Hi,
I have a couple of 3 digit modules 1990-0473 which looks similar but I can't find a cross reference to commercial part number or a datasheet for it.

Robert.
Re: DIY 11667A Power Splitter, resistor placement?

 

开云体育

Even simulation is a great tool or don’t replaces the experience. You don’t need to program a script to design a great splitter or any other component . Software tools requires experience to design ?(create a realistic model ) and understand results.?


Ing. Patricio A. Greco
Taller Aeronáutico de Reparación 1B-349
Organización de Mantenimiento Aeronáutico de la Defensa OMAD-001
Gral. Martín Rodríguez 2159
San Miguel (1663)
Buenos Aires
T:?+5411-4455-2557
F:?+5411-4032-0072

On 12 Nov 2023, at 14:38, Harvey White <madyn@...> wrote:

?You speak Japanese.? Computer programming is just another language.

Harvey


On 11/12/2023 11:22 AM, Jared Cabot via groups.io wrote:
I won't even be able to begin to know how to use any simulation software, especially needing scripts etc...
I'm nothing more than a highschool dropout domestic electrician who dabbled in BASIC 30 years ago and some Windows batch script stuff a while ago, my simulation abilities basically end with something like the 'Saturn PCB Toolkit'
For example, I'm still figuring out the 'real world' differences of microstrip and coplanar waveguide...

I always seem to start a project thinking 'it's just a few parts, it can't be /that/ difficult' then soon realising I'm staring into the bottomless pit. Something something not knowing enough to know what I don't know...haha

Maybe I'll just throw some axial resistors in a box and call it good enough. I haven't even figured out how to measure the performance of the thing on my VNA (Or even how to use a VNA) yet.
Re: DIY 11667A Power Splitter, resistor placement?

 

Don't worry, I haven't given up!
I just need to remember to take one step at a time rather than try to do it all at once and overwhelm myself with the details...


Here is an idea for a PCB design so far. It's a 1.9mm wide, 1oz (35um) thick trace on 1.524mm thick Rogers 4003, a coplanar waveguide with clearance of 0.245mm (except at the 1206 resistors that tightens to 0.18mm to maintain 50ohm impedance)
The center pins of the N connectors is 3mm diameter, so the solder join will hopefully 'funnel down' to the 1.9mm wide PCB pads.
The other pads around the perimeter are for grounding the N connector shells.
I also haven't put vias anywhere yet. Still to do once layout is finalised.

I'll probably just stick 0.1% thin-film resistors in for now, mounted upside down. The pad width has been tightened to the same width as the resistors too, so there will be minimal step. It shouldn't be a problem as they will be hand soldered anyway.
The high frequency RF resistors are much smaller which makes impedance matching much harder with my basic skills..



Let me know how that looks so far... :)


Jared.
Re: DIY 11667A Power Splitter, resistor placement?

 

You speak Japanese.? Computer programming is just another language.

Harvey

On 11/12/2023 11:22 AM, Jared Cabot via groups.io wrote:
I won't even be able to begin to know how to use any simulation software, especially needing scripts etc...
I'm nothing more than a highschool dropout domestic electrician who dabbled in BASIC 30 years ago and some Windows batch script stuff a while ago, my simulation abilities basically end with something like the 'Saturn PCB Toolkit'
For example, I'm still figuring out the 'real world' differences of microstrip and coplanar waveguide...

I always seem to start a project thinking 'it's just a few parts, it can't be /that/ difficult' then soon realising I'm staring into the bottomless pit. Something something not knowing enough to know what I don't know...haha

Maybe I'll just throw some axial resistors in a box and call it good enough. I haven't even figured out how to measure the performance of the thing on my VNA (Or even how to use a VNA) yet.
Re: DIY 11667A Power Splitter, resistor placement?

 

"Jared Cabot via groups.io" <jaredcabot@...>
writes:

I won't even be able to begin to know how to use any simulation software, especially needing scripts etc...
I'm nothing more than a highschool dropout domestic electrician who dabbled in BASIC 30 years ago and some Windows batch script stuff a while ago, my simulation abilities basically end with something like the 'Saturn PCB Toolkit'
For example, I'm still figuring out the 'real world' differences of microstrip and coplanar waveguide...
Not a good excuse :)

Just take things one step at a time - no need to learn everything at
once. But make sure you're always learning (don't let yourself stagnate)
and before you know it you'll be using EM software. And keep an open
mind - most of this stuff isn't all that hard, but it does take some
time to build up the pre-requisite skills.

I always seem to start a project thinking 'it's just a few parts, it can't be that difficult' then soon realising I'm staring into the bottomless pit. Something something not knowing enough to know what I don't know...haha

Maybe I'll just throw some axial resistors in a box and call it good enough. I haven't even figured out how to measure the performance of the thing on my VNA (Or even how to use a VNA) yet.
In my experience, very few "simple" projects end up being simple. But
you also don't need a perfect plan before you start building. Just
choose something, build it, and measure it. Then put some careful
thought into why you're getting the performance you're getting and,
based on that, how you can improve in the next iteration. You'll learn a
lot doing this (including how to use your VNA).

Good luck and keep us posted!
Matt
Re: DIY 11667A Power Splitter, resistor placement?

 

On 11/12/23 09:22, Jared Cabot via groups.io wrote:
I won't even be able to begin to know how to use any simulation software, especially needing scripts etc...
Even if you haven't done as much school, you seem plenty smart to do this kind of thing, and we'll help.
I've been wanting to turn on openEMS and give it a whirl.

Maybe I'll try entering in openEMS the shapes in alan Victor's suggestion of a super tight assembly of connectors and SMD resistors with *NO* pcb. How much effort will that user manual reading and data entry be?

After testing the "solder-chunk" splitter assembly method, then could try adding copper sheet all around it soldered on so it would not vary when close to different lab bench top materials... I'm interested to see how openEMS does with this kind of thing.
Re: DIY 11667A Power Splitter, resistor placement?

 

On Sun, Nov 12, 2023 at 08:22 AM, Jared Cabot wrote:
I'm nothing more than a highschool dropout domestic electrician who dabbled in BASIC 30 years ago and some Windows batch script stuff a while ago

Don't let that stop you from trying.? Your ideas are good, and as you have seen, there are always people here willing to offer suggestions, like how the "big boys" (HP and others) did it.? Learn your VNA, they are wonderful!? There are several groups.io VNA groups, and a number of good application notes on VNAs.
Re: DIY 11667A Power Splitter, resistor placement?

 


Try this and KISS to start. Drawing attached. Butt the 3 connectors of you choice?
together. Solder body to body. You can bridge the wide opening with brass shim.
Nip the center pin as far back as you can...
Wick your solder to the small axial, say 1/8 W or 1206 film R. If you use a pair of 100 ohm
in parallel, parasitic tend to assist in achieving an improved "50 ohm" R. Measure that?
system and see how well you do.?

Simple_splitter.JPG

Re: DIY 11667A Power Splitter, resistor placement?

 

I won't even be able to begin to know how to use any simulation software, especially needing scripts etc...
I'm nothing more than a highschool dropout domestic electrician who dabbled in BASIC 30 years ago and some Windows batch script stuff a while ago, my simulation abilities basically end with something like the 'Saturn PCB Toolkit'
For example, I'm still figuring out the 'real world' differences of microstrip and coplanar waveguide...

I always seem to start a project thinking 'it's just a few parts, it can't be that difficult' then soon realising I'm staring into the bottomless pit. Something something not knowing enough to know what I don't know...haha

Maybe I'll just throw some axial resistors in a box and call it good enough. I haven't even figured out how to measure the performance of the thing on my VNA (Or even how to use a VNA) yet.
Re: DIY 11667A Power Splitter, resistor placement?

 

开云体育

Open EMS is very good I teach it on university. A great alternative to paid software.?


Ing. Patricio A. Greco
Taller Aeronáutico de Reparación 1B-349
Organización de Mantenimiento Aeronáutico de la Defensa OMAD-001
Gral. Martín Rodríguez 2159
San Miguel (1663)
Buenos Aires
T:?+5411-4455-2557
F:?+5411-4032-0072

On 12 Nov 2023, at 12:52, Matt Huszagh <huszaghmatt@...> wrote:

?
You can also model the launches with an electromagnetic wave simulation software. I’ve used OpenEMS, which is free and will produce accurate results if you give it an accurate input. Using this makes it easy to test out different cutouts, transitions to the PCB transmission line, etc. You can even easily set up python scripts that will tune a parameter to optimize a result for you (my wrapper tool on GitHub, pyems, will do this for you). Knowing the specs of the PCB material will improve the result - using a proper RF material like a rogers material will help here.

OpenEMS will simulate the passive resistors for you too, but I probably wouldn’t bother with this. This is a more difficult thing to do and I haven’t had very good success modeling passives with OpenEMS in the past.

Matt
Re: DIY 11667A Power Splitter, resistor placement?

 

You can also model the launches with an electromagnetic wave simulation software. I’ve used OpenEMS, which is free and will produce accurate results if you give it an accurate input. Using this makes it easy to test out different cutouts, transitions to the PCB transmission line, etc. You can even easily set up python scripts that will tune a parameter to optimize a result for you (my wrapper tool on GitHub, pyems, will do this for you). Knowing the specs of the PCB material will improve the result - using a proper RF material like a rogers material will help here.

OpenEMS will simulate the passive resistors for you too, but I probably wouldn’t bother with this. This is a more difficult thing to do and I haven’t had very good success modeling passives with OpenEMS in the past.

Matt
Re: DIY 11667A Power Splitter, resistor placement?

 

You will find that a significant limitation to performance is the launch to the resistors.
Assume the resistors are perfect. Set the connector launch to a simple model of series L and shunt C as there is a discontinuity at the connector
as soon as you exit the coax structure. I set the L to 500 pH and the C to 500 fF.
That limits the return loss at the output port to ~ 12 dB at 3 GHz.
Be prepared to dress the connector. I file the pins flush to the dielectric and file the body to a flat to create a launcher.
Not perfect but going in the right direction. Your figures, pictures, ?demo way excessive series inductance.


Alan
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