| Products > Test Equipment |
| Test Equipment Anonymous (TEA) group therapy thread |
| << < (24986/27437) > >> |
| mnementh:
I did state that... like a day ago: https://www.eevblog.com/forum/testgear/test-equipment-anonymous-(tea)-group-therapy-thread/msg4273822/#msg4273822 And from my standpoint, zero hassle. We've started the dispute resolution process. That is how you're supposed to do this. As I said, starting the dispute is not in and of itself an attack; it is simply how business is done. We in this thread do, however, seem to get pretty invested in these incidents. ;) My original intent was just to let my fellow TEA members know about another suspect seller. After that, the whole thing did seem to take on a life of its own... :-DD mnem TEAnonymous members nit-picking in the thread...? Perish the thought! :P |
| Vince:
--- Quote from: AVGresponding on July 02, 2022, 05:01:19 pm ---Well, as promised, here's a (brief) report on the Agilent DMM logger interface. --- End quote --- Wow....you sure were motivated to get this working, well done !! As for me I probably would have thrown both meters in the trash out of anger and despair ! :scared: You remind me that I need to make a serial IR cable for my old Metrix DMM 53/54/56. It's unobtainium, need to make your own. |
| mnementh:
--- Quote from: factory on July 02, 2022, 05:11:47 pm --- --- Quote from: m k on July 02, 2022, 04:24:57 pm --- --- Quote from: mnementh on July 02, 2022, 04:08:13 pm --- --- Quote from: factory on July 02, 2022, 02:05:50 pm --- --- Quote from: mnementh on July 02, 2022, 03:05:23 am ---Uggghhh... Okies... anybody got any tech ref on the monitors used in these HP scopes? I understand the difference between the two implementations is the 54621D and family use 32-grayscale palette, while the 54600A and family use a 2-grayscale palette. 54645A/54600A use HP 2090-0316/DataRay CDM-7SF191, the 54621D uses HP 2090-0384/DataRay CDM-7SX191. My searches in the available HP SMs and on the internet turned up bupkis. Before I go guessing based on poking around with my scope, does anybody here have actual pinouts and or schematic for these monitors? Tomorrow I figured I'd start looking at the CLIP package from the 54645A and see what I can find there. Maybe lookit the video chip on each and see if I can find some datasheets. :-// mnem :=\ --- End quote --- I'm would be surprized if they aren't interchangeable, they look to be standard bought-in monochrome monitors to me, the different greyscaling would be something done in the video processing, on the mainboard and the output just a video signal. Certainly I saw the video signal on the diagrams for the 54645A, that was posted a few weeks back. I think the other connections are power (+15V?), an external pot for brightness, can't remember what else there is. The chip on the Hitachi CDM-7SF191 board in my 54615B is a uPC1379C, this is a sync signal processor IC intended for small B/W & color TVs and does the vertical & horizontal stuff, that is done by more discrete parts on the earlier scope displays (the only one that a diagram seems available for).David --- End quote --- Yeeah, I'm not sure. IIRC, these are actually a TTL digital input monitor, so not that simple. I need to do some research. :-+ mnem :-/O --- End quote --- Neck board has an added 74S03, so maybe 16 new shades of gray. CNC industry have had small screens for quite some time. Possibly already have an almost ready replacement LCD. --- End quote --- The 7403 is on the CDM-7SF191 in the 54645A/54600A/54615B, the newer CDM-7SX191 looks to use one or two transistors instead. The larger monitor boards look to use a similar signal processor IC, layout has changed a bit, need to find better pictures. The boards in my CDM-7SF191 from 54615B, taken before the re-capicide. Pictures of CDM-7SX191 from ePay listing. David --- End quote --- Oooh... good idea, looking on fleaBay for pics rather than beating my head against nonexistent documentation. :-+ I've done this before; no idea why I didn't just start there. :-// So possibly the difference is just support for the uPC1379C. VCC/GND are the same pins; I need to trace out the circuits for the BRIGHTNESS pot and see where they are in the pinout. mnem :-/O |
| Vince:
--- Quote from: bitseeker on July 02, 2022, 04:47:20 pm --- [..] In other news, lots of new POI added to post #2 (the extension to the TE list in post #1). Does anyone actually use the POI lists to find stuff in this thread? ??? --- End quote --- Wow ! I don't use it OFTEN, but I know it's there and sure appreciate it when I need it ! All my old beloved junk is listed there, thanks to you. All my hollow state Tek this or that, even my beloved Nixie Rochar DMM and Metrix boat anchors ! When I need to dig out an old TE of mine I know I can just go there and find it, it's very valuable to me ! Please keep doing it, please........ please ? :-+ I assure you I do appreciate all the effort you are putting into this silent background archiving, I really do ! Please don't stop... |
| BU508A:
--- Quote from: bitseeker on July 02, 2022, 04:47:20 pm ---In other news, lots of new POI added to post #2 (the extension to the TE list in post #1). Does anyone actually use the POI lists to find stuff in this thread? ??? --- End quote --- Yes, I do from time to time. |
| Navigation |
| Message Index |
| Next page |
| Previous page |