Become a fan of Slashdot on Facebook

typodupeerror

## Comment Re:How? (Score 1)368368

Just exactly how do they propose 'taking out' a drone?

There is at least one case where a drone was taken out by a fire hose at a house fire. The troubling thing in that case, though, is that a firefighter took his hose off of the fire to take out a drone that was far enough away as not to be causing any real problem. The fire department ended up replacing the drone.

## Comment Re:Easily replicated with an SDR... (Score 2)138138

Part 15 reads almost the same for 900 MHz as for 2.4 GHz: You can use 1W if you are doing one of three things.

Thing 1 is to send a direct-sequenced spread spectrum signal (not in this case)

Thing 2 is to send a frequency-hopping spread spectrum signal, with a maximum dwell time of 400ms and a minimum of 50 channels in your spreading sequence (again, not the case here)

Thing 3 is to send a digital signal of at least 500 kHz RF bandwidth (which is likely to be the case here)

Additionally, there are bonuses for using good antennas (the FCC seems to want to encourage this). You do need to reduce your transmit power if you have a gainful antenna, but you only have to reduce power by 1dB for every 3dBi of antenna gain. For example, using a 3dBi antenna (for instance, a 5/8 wave) would double the strength of your transmitted signal, but would require you to turn down your transmitter power by 1 dB, making it roughly 800 mW rather than 1W. Put this together, and you get an effective radiated power (ERP) of ~ 1.6W.

In a more extreme case, imagine using a 24dBi directional antenna: You get a 2^8 boost in your signal from the antenna, and only have to cut your power by 8dB. Actual transmitter power ends up at 160mW, but the boost from the antenna gives you an ERP of ~40W.

## Comment Re:From a user standpoint (Score 2)484484

Additional things to bring from Amiga:

• From the CLI, a directory appears to be just another executable object. Name it on the command line and you are there. Put another way, the "cd" command is just white noise.
• Device names, volume names and aliases are interchangeable. Program or script needs a particular volume of removable media? Simply reference it by name (e.g. foo:). A dialogue box will pop up asking you to put that volume into any drive and click OK. You never need to click OK, because it will detect the volume insertion and carry on. Did you copy that data to the hard drive? Just define an alias so that, for instance, foo: now points to system:volumes/foo.

That said, don't look to Amiga as a model of stability . . . it wasn't. All it took to bring one to a red guru meditation was to attempt to read past EOF.

## Comment Re:Only three things are certain (Score 1)297297

Well, tax, death, drive failure and tax hasn't got that much tax in it.

## Comment Re:Monster Business School (Score 1)288288

It wasn't really his guitar cables that were under discussion at the moment . . . he was going on about the expensive audiophile cables he'd put into his home system.

As for his guitar cable, as long as the 1/4" stays seated and the current flows, it's all good. The hum itself was in his amp, which was a bit vintage. Now, vintage guitar amps are fine as long as they are maintained, but this one needed some help. I know another guitarist that uses the same amp and it sounds great.

## Comment Re:Monster Business School (Score 5, Funny)288288

customers who advocate the superiority of your product on faith alone. Because they spent so goddamn much.

The guitarist in a band I've engineered for is stone deaf but thinks of himself as an audiophile. He can't hear the hum coming out of his guitar amp, but swears by these overpriced interconnect cables as well as the special acoustic pad that he puts said humming amp on. One night I pointed out one of the XLR cables to him and said, "You see that \$10 cable there? Whatever you're listening to went through one of those." He didn't say another word to me all night.

Living on Earth may be expensive, but it includes an annual free trip around the Sun.

Working...