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July 18, 2006
about 10 years ago
I plan to buy one. Digging deeper, I see the pattern generator can be tristated, it shares pins with the logic analyzer. I suspect that 2GS/sec figure they give for repetitive signals is a very fuzzy number, not sure what it really means. Here's a quote from their website:
"The 200MSa single shot sample rate and 60MHz bandwidth will allow you see a great picture of a 60MHz signal in single shot mode and an even faster one if you use RIS mode sampling."
Looks very like a very nice product, I'm tempted. Their data sheet says 60 MHz analog bandwidth on the scope, has 200 MSPS in single shot mode, claims 2000 MSPS in repetitive mode. And suggests the logic analyzer and pattern generator can be used simultaneously with the scope (very good!). Good gain control, from 400mV/div to 40V/div. But is there any hope of better than 60 MHz analog bandwidth in repetitive mode? I'd guess they are using the National ADC08200 (or its 1K buffered cousin the ADC08B200) with 500 MHz full power bandwidth, anyone know for sure? To get better than 60 MHz bandwidth, would need to defeat the 60 MHz front end filter, then pray they have an extremely well designed circuit to measure that initial trigger-to-clock interval at the start of each grab.
News - Playing with Cheap Heat G…
about 11 years ago
We've been using the Weller #6966C at work for decades, ~$120. Gives 250 watts funneled into a 2" long 0.35" dia nozzle at hair-dryer air speeds. Works well on most parts, from SFF transceiver cans (might need two such guns) down to 0402 surface mount. We also use it for installing surface mount parts, especially those with a power pad. Protect neighboring parts with tin foil first, especially those that are small or thermally isolated. Dance the airstream about to distribute the heat evenly.
If you can't afford the Weller, consider taking a used hairdryer, add a nozzle, and slow the fan. Careful though, some of those can give nearly 10x the heat of our 250 watt Wellers. And not clear the materials they use will stand up to the higher temperatures, may need to add an interior metal shield plus insulation layer to the heating element chamber.
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