[RFI] USB Spectrum Analyzer

mstangelo at comcast.net mstangelo at comcast.net
Thu Sep 25 14:59:10 EDT 2014


I had considered a SDR-IQ but wanted to view a wider bandwidth so I purchased a QS1R which can display up to 2Mhz of bandwidth. I also use it as a second receiver with my K3.

The QS1R however requires external power. For portable operation I purchased an Upconverter to front end my rtl2832:


I only has 45db dynamic range but can view a wider bandwidth. I use SDRSharp software and have a portable analyzer which meets my needs for under $100.

Mike N2MS

----- Original Message -----
From: Jim Brown <jim at audiosystemsgroup.com>
To: rfi at contesting.com
Sent: Thu, 25 Sep 2014 17:25:59 -0000 (UTC)
Subject: Re: [RFI] USB Spectrum Analyzer

On Thu,9/25/2014 10:09 AM, mstangelo at comcast.net wrote:
> The DVB-T doesn't cover HF, the rtl2832 starts at 24Mhx, but the price is right.

Starting at 24 MHz is just fine for chasing impulse noise like that from 
faults on the power distribution system, but is useless for chasing 
noise generated by most electronic sources like switching power supplies 
and clocks of various sorts.

Paul's suggestion of an SDR with suitable frequency coverage and user 
software seems a far better solution for chasing those electronic sources.

73, Jim K9YC
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