$129 spectrum analyzer Re: [Open-graphics] PCIe know-how?

[James Richard Tyrer]

Dieter wrote:
>> So the question is whether you can make a good PC card digital 
>> oscilloscope for $100.00.  You need an oscillator, frequency divider, 
>> PLL, sample & hold, and DAC as well as the PCIe interface.  I seriously 
>> doubt that this is possible for $100.00 but it does depend on the 
>> maximum input frequency you wish to use, sample rate, and the accuracy 
>> (and number of bits) needed.  Actually, you can spend over $100. on a 
>> good DAC
> 
> You can get a 2.4 GHz spectrum analyzer for $129.
> 
> http://www.dunehaven.com/lcsa.html
> 
> If a 2.4 GHz spectrum analyzer can be sold for $129, why not a lower
> frequency unit?

This device isn't really a digital spectrum analyzer.  It is a sweeping 
RF signal strength meter.  Such a device is quite useful but it isn't 
going to work for lower frequencies.

-- 
JRT