Tag Archives: DSO

IWATSU LeCroy 9350A — bringing back old memories…

This “beauty” appeared on my desk today. Just testing & playing with it. I used the arb sig-gen of a PicoScope 2204A for generating a unpleasant test-signal. Trying to trigger on it was “interesting” :-)

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I received an email today…

The sender was the current CEO of LeCroy, Thomas H. Reslewic. I’m glad they have finally taken action. I was offered a full refund. I hope they will also look into all the WaveAce 224 issues I’ve documented so far … Continue reading

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WaveAce 224 — Mini rant #11: Bricked for 10 minutes!

This is a ‘close relative’ to the ‘eternal boot screen’. It is also caused by the all-mighty triggering system, which governs the whole oscilloscope – even when it shouldn’t. One of the most annoying things is that this can block … Continue reading

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WaveAce 224 — Mini rant #9: ZOOM Zoom zoom… or NOT…

Will it ever end? How many bugs are there still to be discovered… A word of warning: there will be some strong language in the post. If anybody affiliated with Lecroy should read this, please feel offended – not as … Continue reading

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WaveAce 224 — Mini rant #8: Signal averaging continued

Another quirk. I seem to have a talent to upset this device. Showing a signal that isn’t there should not happen though.

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WaveAce 224 — Mini rant #7: Signal averaging

It works! BUT it comes at a cost.

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WaveAce 224 — Mini rant #6: Cursors and auto-measurements

Automatic cursors are supposed to show what and where stuff is measured on a waveform when automatic measurements are used. This is pretty useful, if it works as expected. Suffice to say that it doesn’t always do that – unfortunately.

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WaveAce 224 — Mini rant #5: Now what is this?

Got the ‘pulse-trigger’ to trigger. This time I don’t care if the set pulse-length is actually accurate, I just wanted it to trigger on the ‘thing’ and it did. Fine – happy happy joy joy! Then I felt like moving … Continue reading

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Lecroy WaveAce 224 — Mini hack #001: Upgraded ground clip

I managed to damage the alligator clip on one of my probe’s ground cables. It was probably a bad one and it fatigued. I replaced the alligator clip with one I found in a box. During this procedure it turned … Continue reading

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WaveAce 224 — Mini rant #4: Fixed record-length…

Noooooooo………………………………………..(gasp, cough)

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Lecroy WaveAce 224 — Mini rant #3: Quality control…

Where art thou? This time I have discovered issues that are trigger-related, but more suitably filed under “general displaying issues”. Still using the “1.01.01.18R2” firmware. Just have a look at the video. No more words…

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Lecroy WaveAce 224 — Mini-rant #2: Maximum annoyance!

Oh boy, this thing can’t even count correctly… or since when is 7 = 9 ? Pulse-Trigger: I call that a bug.

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DSO Teaser

To see what of the trigger system of the WaveAce 224 works and doesn’t work (as I expect it), I’ve made a little device, which shall from now one be called DSO-T.

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Lecroy WaveAce 224 — Mini-rant #1

This is the first post regarding the Lecroy WaveAce 224 DSO. As it currently seems I have material for at least a few short posts. Currently I’m having issues with one important knob and the triggering system.

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Playing with the OSCCAL register of an ATmega168

I was having problems with the “led ring” boards. Their internal oscillators were not ticking with the same speed and required constant re-syncing. I tried to improve the situation by recalibrating by adjusting the OSCCAL registers. Recalibration can be done … Continue reading

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Jyetech AVR digital oscilloscope DIY KIT — trying to fix it – part 2

Maybe you remember my last post about the Jyetech oscilloscope and it’s weird behaviour. Not all of them are strange, as the free replacement DIY KIT I received from them works fine. At that time I suspected a sick ATmega64 … Continue reading

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Jyetech AVR digital oscilloscope DIY KIT — trying to fix it – part 1

The symptoms since a firmware upgrade (and downgrades, re-upgrades…): strange characters on the display for SEC/DIV system freezes +/- buttons are ignored (but still work physically) the ADC chip doesn’t get a CLK signal during a freeze My theory: The … Continue reading

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Jyetech AVR digital oscilloscope DIY KIT — Firmware upgrade odyssey

I bought the DIY KIT at seeedstudio recently, as I needed to feed my soldering obsession. Here are some images of the KIT coming right out of the box: I had to use my milling machine, because the front panel … Continue reading

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