Maker Pro
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USB Spectrum Analysis S'ware

S

Steve Hammond

Jan 1, 1970
0
I am looking for spectrum analysis software, with similar capabilities
to "Sigview" or "Spectrum Lab+, but that will read data from the USB
port instead of soundcard input.

I don't need dedicated PC test equipment like BitScope, or a full
blown science package like LabView. Just a way to display the output
of my LabJack DAQ.

Does anyone have any suggestions?

Steve Hammond
 
P

PeterD

Jan 1, 1970
0
I am looking for spectrum analysis software, with similar capabilities
to "Sigview" or "Spectrum Lab+, but that will read data from the USB
port instead of soundcard input.

I don't need dedicated PC test equipment like BitScope, or a full
blown science package like LabView. Just a way to display the output
of my LabJack DAQ.

Does anyone have any suggestions?

Steve Hammond

*exactly* (specifically) how are you getting that signal into the USB
port?
 
J

Joerg

Jan 1, 1970
0
Steve said:
I am looking for spectrum analysis software, with similar capabilities
to "Sigview" or "Spectrum Lab+, but that will read data from the USB
port instead of soundcard input.

I don't need dedicated PC test equipment like BitScope, or a full
blown science package like LabView. Just a way to display the output
of my LabJack DAQ.

Does anyone have any suggestions?

Check if this one can be re-piped to USB streaming:

http://www.qsl.net/dl4yhf/spectra1.html

There is a routine where the input stream origin can be programmed to
some extent but I am not a software expert and have not used this part
of it:

http://www.qsl.net/dl4yhf/snd_utl1.html
 
J

Joerg

Jan 1, 1970
0
LTspice + whatever you need to access your labjack.


Interesting, that would be cool. How do you stream the data from the
LabJack into LTSpice though?
 
J

Joerg

Jan 1, 1970
0
Joel said:
I suspect he's thinking of using LTSpice's ability to suck in a .wav
file, perhaps?

AFAIR you have to do that by hand, wouldn't be much of a spectrum analyzer.
 
T

Tim Williams

Jan 1, 1970
0
1. If narrow band, mix with LO and downconvert. If wideband, sample
periodically to divide.
2. Feed audio frequency signal into computer's microphone or line input.
3. Record WAV and analyze with your choice of free FFT software.

Mind to keep notes of LO frequency or sample rate to calculate the converted
frequencies.

Tim
 
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