Hi,
When I came down in the shack Sunday morning, my shack PC was unexpectedly turned off. When I switched it back on, the U7 refused to enumerate with the following detailed message:
http://ab2tc.com/u7_failure1.pngSeveral more disconnection and reboot attempts produced the same failure. Taking the U7 to my laptop again produced the same failure. The cable was not the same on the laptop so cable failure can be ruled out. I actually tried a third cable on the laptop to no avail. One symptom I noticed is that the blue LED on top only blinked a few time then remained off. On a normally working unit the LED comes on quickly and stays on. From my experience with USB at work, this type of failure means the PC sees the pullup resistor, but is unable to retrieve the device descriptors from the device. This rules out anything to do with configuration of the device or the PC driver. Has anybody else had a USB failure with the U7/U5 models?
Well, accepting defeat I got out my brand new U5 which was intended for portable summer use with my older K3 and hooked it up to the K3S. It works fine but isn't as quiet for noise and spurs as the U7. See here for links to screen shots of both:
http://ab2tc.comIs there any reason the two models should be different or is this just a random device difference? I need to know as it makes my decision whether to buy a replacement U5 or U7. I prefer the U5 since all the connectors are on the back which is much more convenient, but if there is any doubt that the U5 has equivalent performance, I will stick with the U7.
AB2TC - Knut
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