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Logic analyzers are very useful, but somewhat limited in what they do. They really were needed in the times of 8 and 16 bit microprocessors, and are less useful for microcontrollers. However, since

*Re: Isolation Transformers* When using an isolation transformer for troubleshooting you do not want an earth being connected through. The whole idea is to break any reference between earth & the

Hi Tom, That occurred to me earlier, it is -970V, which seems a little low, but there is no information on tolerance. I measured it with both a 20M DVM, and a 200M 410C. It would be nice to know what

How about the -1kV supply to the PDD electrode? It is regulated mostly by four series 200 volt zeners. If one of those were shorted, it would lower that supply and affect the geometry adjustment. You

I tried pulling the plug on trace rotation, and on y-axis rotation, and the only effect was the trace rotated one line width clockwise. I guess that eliminates them, and any fringing effects from the

Hi Matt, Did you check the various low voltage supplies before you took the power supply out of your 2246? Knowing what the individual voltages are, and knowing how much ripple is present on them will

I got my TR502 Tracking Generator, DC508 Option 7, and TM503 Option 7 all set up and I then discovered I need the 6 pin LEMO cable (3 male pins and 3 female pins) that goes from the Spectrum Analyzer

Since I only have the 308, I can't say about the tektronix ones. However, HP makes things in the 5000 series (such as a 5005B) that are signature analyzers, and peak reading voltmeters... Harvey

I did take the CRT out, and did not see anything rattling about inside the shield, but it is possible that a magnet could be stuck up in there somewhere. The trace rotation could be eliminated by

Thank you for the manual link. I will review the front panel function and see what I come up with. The trigger lights to not flash any codes on startup (if I do a reboot after I get the panel to come

How do you test these? The 7 pS rise time is a pretty difficult spec if you want a 10x margin. I'm contemplating a mercury wetted reed relay, but even that looks to be 2-3 pS at best. I just received

Hi Chuck: Thanks for letting me know. I saw that about the 308 does it (from Tekwiki).. page 1, and page 78, in the 308 operator guide/instruction manual. Signature analysis is built into the 308...

The common faults and solutions to the power supplies on ALL the 22xx scopes are in the archives of this group. seriously this group goes over the same stuff repetitively :) The 2246 (applies to the

That is correct. Raymond

I see that possibly adding correction magnets to fix the problem has been mentioned here somewhat. Here's another idea, that may seem far-fetched, but not impossible: What if the 2467 CRTs originally

Is this being offered by you personally or by Astro Too? If it’s for Astro Too I don’t think that it is appropriate to use this forum as a sales channel. DaveD Sent from a small flat thingy

Well, upon seeing the Operator's manual (Thanks for posting it to Tekwiki!)… I can see that manual has examples of how to set up the 318, that the Army service manual doesn't give. But I guess, and

Yes, it has full signature analysis. -Chuck Harris Roy Thistle wrote:

Hi Harvey: Thanks for the reply. There's always a few old L.A.s keeping the concrete slab down, in someone's basement... and I'm thinking about that, whenever I see one. The 308 has a word recognition

Greetings. I have this tektronix 7704 scope that i have been having a difficult time finding a good home for. I am looking to sell it. It powers on, however i lack the skills to properly test it.