from what we've heard from a couple countries, being able to do on-board repairs is necessary. still, i'm not sure it's something US repair centers would be doing.<br><br>-nikki<br><br><div class="gmail_quote">
On Thu, Jun 12, 2008 at 11:12 PM, Ian Daniher <<a href="mailto:it.daniher@gmail.com">it.daniher@gmail.com</a>> wrote:<br><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
What repairs would be carried out that necessitate a scope? <br>In my opinion and [limited] experience, the individuals with enough skill to use a logic analyzer and oscope to determine the bug, and then a hot air rework station and soldering set to fix the chip, could probably earn enough money during the time period required to purchase a new XO(or at least a new motherboard), therefor making it fairly illogical for first-world repair centers to invest in such machinery. <br>
Thoughts?<br>--<br><font color="#888888">Ian</font><div><div></div><div class="Wj3C7c"><br><br><div class="gmail_quote">On Thu, Jun 12, 2008 at 10:39 PM, Nicholas Bodley <<a href="mailto:nbodley@speakeasy.net" target="_blank">nbodley@speakeasy.net</a>> wrote:<br>
<blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
<br>
NKC Electronics carries them; also their logic analyzers. See<br>
<<a href="http://preview.tinyurl.com/4nskva" target="_blank">http://preview.tinyurl.com/4nskva</a>><br>
(Preview is a security measure.)<br>
<br>
When you get to some detail, they look very nice, indeed.<br>
<br>
Tried to download the manual (PDF) for the 25 MHz 'scope, and needed a<br>
username and password. I think I clicked on Help, or such, and saw some<br>
Chinese!<br>
<br>
Company site (they're Chinese):<br>
<<a href="http://www.rigolna.com/default.aspx" target="_blank">http://www.rigolna.com/default.aspx</a>><br>
<br>
Now, the $65,536 question: How good are they? I Googled a bit, and a<br>
rather offhand comment (sample of one) was that it's good for a knockabout<br>
'scope; same person had a couple of Agilents.<br>
<br>
Also was reminded that for decent reconstruction, you need several samples<br>
per cycle (of a sine wave). I don't know, but the recommendation was a<br>
sample rate about 10x the upper limit you expect to see -- that would<br>
imply 1 Gsa/s (Gsa?) for seeing up to 100 MHz.<br>
Many years ago, Tek. had a sine interpolator, apparently to try to create<br>
a decent displayed waveform with fewer samples. No idea what it did for<br>
pulses. IIrc, it was user-selectable.<br>
<br>
--<br>
Nicholas Bodley<br>
Waltham, Mass.<br>
A 1 mHz clock puts out one pulse every 1,000 seconds.<br>
HP made function generators that went down to 1 µHz.<br>
Perhaps Agilent does, still.<br>
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