I had the opportunity to put the DSO-2250 up against an HP/Agilent 54645A oscilloscope this evening, comparing them on a variety of signals up to 75 MHz.
It’ll probably come as no surprise that the HP ran circles around the DSO at the higher end of their range but below 25 MHz the $200 DSO held its own quite respectably. From 30 to 50 MHz, the DSO’s displayed trace became increasingly unsteady and amplitude measurements became less accurate.
Above 50 MHz, I wouldn’t trust the DSO any further than I could spit a mouthful of fish hooks. Continue reading 'More on the DSO-2250'»
My USB-based, 2-channel, digital storage oscope arrived yesterday and I thought I’d post a few photos and screenshots for those who may be interested.
I bought the oscope for $200 from eBay seller “ddtaktak1995” who has a 99.5% rating. A few hours later I received an email (seperate from the normal eBay channels) from Yan Leung stating that he’d received my payment and that I would soon receive a tracking number.
Tracking shows that the item arrived in New York 7 days later and here to my QTH (Texas) 5 days after that. Continue reading 'Initial impressions of DSO-2250'»
Thanks to my job, I’ve never had any reason to buy test equipment.
All QRP rigs I’ve ever built were aligned using top-grade gear that I could never hope to afford so my only gear here in the shack is a Fluke 87 and an antenna analyzer.
But there have been many times I’d rather be able to work beyond the basic DVM tasks from here in the shack.
I first learned about USB-driven DSO’s (Digital Storage Oscilloscope) about 7 years ago. At that time, they were very basic…crude, even – and not very useful for signals above 5 MHz unless you were willing to pay an astronomical price. Continue reading 'New oscilloscope on the way'»