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After installing the socket, I did an ohmmeter test on all connections to the socket from other chips and they are all fine. By default (no voltage applied), the input selection relay selects GND, so

Hi, I've just acquired a Tektronix 318 logic?analyzer, but it came without the pods. It's a nice unit, and by the looks of it, it works, well it displays random logic levels on screen as no pods are

I'm partial to Advin myself. Alternatively, a decent used Data I/O programmer. Happy hunting. * REPLY SEPARATOR * for

When you removed the chip did any of the plated through holes loose the plating? I think the board is up to six layers. You may have lost an internal connection to the chip. Tom

Priya, Wow, I didn't know it was all channels! Check your trigger setting, try a single shot too. maybe your focus is so far out you can't see it. Look at it in the dark too. Check the rejection

The 24xx digital scopes lack any such limit because they make measurements in a completely different matter. What I wonder is why the 2247A series which *do* operate in a similar way do not have such

Are you referring to Page 1-11, Volts, Maximum sine-wave frequency? This is very confusing because here it actually says greater than or equal to 1MHz. --Victor

Francis: I wanted to let you know that the battery was exactly where you suggested. The replacement is completed with no issues, Thank You again for your help, it is appreciated. Chuck W9POU

Magnus/Alexandre, Thanks for the feedback! Mark

HankC <hankc918@...> wrote: Nope. They're muxed, so the digit & segment drivers are ok. Gotta be LED-specific (or socket, or solder joint...) -ls-

I wasn't clear in describing my symptom. 5 of the 7 digits are OK; they display an "8" when you hold the reset button. One digit has a bad center horiz segment; another digit has a bad top horiz

If these are socketed, first try wiggling the individual displays in the socket, then try swapping a known good display for an apparently defective display. I've known these displays to lose a

I wasn't clear in describing my symptom. 5 of the 7 digits are OK; they display an "8" when you hold the reset button. One digit has a bad center horiz segment; another digit has a bad top horiz

Hi Mark, I have not seen any Xeltec programmer over many years. However, if I am allowed to make a recommendation: I can honestly recommend the products from batronix.com. I have their BX40, and it

Hi Nick, There is currently no trace on any of the channels after installing the IC socket at U174. However, the beam finder works as do all the menus and also the vertical time base cursors and

Change Q1222. It should be full off and the collector should be up around 90 volts or so. However, Q1223 could also be pulling that line down so change it also. You could lift the collector of Q1223

Good programers, but I'd buy Elnec Ops, I have a beeprog from Elnec :)

What happens when the digit is a "5" or a "6"? How about when it is a "9" or a "7"? Is it only the top and middle horizontal segments? Mark

So spake Mr Alex Gates... ;-) Mark

Anybody familiar with the Xeltec line of programmers? Good, bad, indifferent? I see a batch of 'em all the time on Ebay, some going for seemingly high prices. Thanks, Mark