Hi there, Bob. I had exactly the opposite reaction from Signal Hound. I originally=20 had the "A" version of the analyzer. I found that the LO leakage out=20 the input port was completely destroying the performance of the=20 Wireless Mic and Intercom receivers that the spectrum analyzer was=20 supposed to be supporting. This was in a live broadcast situation=20 and it took a while to figure out that the periodic (repeating)=20 interference we were experiencing was coming from the Signal Hound=20 located several hundred feet away. What we were seeing was the LO as=20 it swept across the spectrum that we were using. I talked extensively with Signal Hound and urged them to do something=20 about the problem. They offered me the option to upgrade to their about-to-be-released=20 "B" version. I received one of the very first production units. I=20 don't recall how much they charged me but it seemed entirely=20 reasonable at the time. I sent my original unit back to them and=20 they sent me the replacement. Bonus: they sent me the=20 temperature-calibrated version at no extra cost - the first batch of=20 production analyzers were all calibrated over temperature as part of=20 their development process. I got lucky! The SA-44B analyzer has been working perfectly. It is in use at many=20 live Broadcast events, especially live Curling events that originate=20 in North America (both Canada and USA). There are so many channels=20 of Wireless Mic receivers in use at any one time that the lead A2 on=20 the show finds that having a spectrum analyzer is almost essential for him. All I can do is suggest that you reach out to Signal Hound and see if=20 they will offer you an inexpensive upgrade to the "B" version. dwayne At 10:19 PM 9/17/2019, Bob Blick wrote: >Hi Dwayne, >I was an early adopter of Signal Hound, and I have the exact=20 >opposite opinion. The early units had problems, which evidently they=20 >have mostly fixed. And as the company grew, they completely=20 >abandoned me. Even though I supported them with good cash money at=20 >the beginning when they needed it most, there was no upgrade path=20 >for me and my orphaned unit. Not even a trade-in discount for the=20 >new version was offered to me when I asked. Bad taste in my mouth, for sur= e. >Bottom line from me: "Avoid" >Friendly regards, Bob > >________________________________________ >From: piclist-bounces@mit.edu on behalf of=20 >Dwayne Reid >Sent: Tuesday, September 17, 2019 2:06 PM >To: Microcontroller discussion list - Public. >Subject: Re: [EE] Simple spectrum analyzer > >Hi there, Dave. > >I think highly of the Signal Hound line of spectrum analyzers. Their >lowest-cost analyzer is WAY overkill for what you need **BUT** you >can write your own application using their API and have exactly zero >controls if you wish. > >The USB-SA44B analyzer is 1 Hz to 4.4 GHz ><https://signalhound.com/prod= ucts/usb-sa44b/> > >Interestingly, Signal Hound just release a customer success story >where they used the SA44B in an unattended site to gather data for >FCC compliance. The description of what they did is on the Signal >Hound website. > >You may also be will to consider Ariel Rocholl's >RF Explorer. His products are now available from Seeed and >Digikey. I'm not sure if you recall, but Ariel is a long-time PIClister. > >Just food for thought. > >dwayne > > >-- >http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive >View/change your membership options at >http://mailman.mit.edu/mailman/listinfo/piclist --=20 Dwayne Reid Trinity Electronics Systems Ltd Edmonton, AB, CANADA 780-489-3199 voice 780-487-6397 fax 888-489-3199 Toll Free www.trinity-electronics.com Custom Electronics Design and Manufacturing --=20 http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .