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Old 15th March 2002, 01:53 AM   #1
hugeli60 is offline hugeli60
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Default Network Analyzer

I want some opinions of DIYers out there.

How much would you be willing to pay for a small, portable USB-based Network anaylzer that you could hook to your PC? Something that could do frequency/phase plots of your amps, pre-amps and filter networks. Maybe even it could have a THD measurement feature. Not something Ultra-high end but medium resolution for the average hobbiest.

Thanks for you input.
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Old 15th March 2002, 05:27 AM   #2
FBJ is offline FBJ  United States
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Join Date: Mar 2002
Location: USA
I'm willing to give my first born child. But I don't have a first born. But still when I get one it's your. Please give us more info. Don't tease!
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Old 15th March 2002, 06:52 AM   #3
palesha is offline palesha  India
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Join Date: Nov 2001
Location: Pune India
Every manufacturer want to sell his product at maximum price. Every customer wants it at lowest price. It is better u be ur own customer & think about fair price. This will help u decide better. I am also interested but depends upon the pricing.
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Old 15th March 2002, 02:30 PM   #4
tiroth is offline tiroth  United States
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Join Date: Dec 2001
Location: Pittsburgh, PA, USA
Even the average hobbiest probably wants 90dB granularity. If it included spectrum analysis, THD, and S/N calculations I would jump at paying a few hundred dollars for such a tool.

It would have to be more robust than the average soundcard, which usually dies when subjected to a few volts at the input.
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Old 15th March 2002, 03:00 PM   #5
daatkins is offline daatkins  United Kingdom
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Join Date: Aug 2001
Location: Bath, UK
Frequency response measurements can be done with Speaker Workshop (from www.audua.com) using a duplex soundcard for input and output. Obviously, the quality of meausrements does depend on the quality of your soundcard inputs. I use a Turtle Beach Montego2 with very good results.

To measure the electrical frequency response of a network, simply use the MLS output to drive your network/amplifier/active crossover and use a probe instead of a microphone to measure the system output. I've used this excellent software to taylor the frequency response of my three way active crossover. I've also added clamping diodes to the input of my soundcard after accidently frying my SB PCI512 with +15v from an op-amp power rail....

SW can also do THD measurements (THD vs freq, THD vs power and THD vs ??) but I haven't received sensible figures using it so I'm not sure the function works correctly.

Nice one.
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