Search found 10 matches

by Mike H
Thu Apr 04, 2019 10:22 pm
Forum: Spectrum Analysis
Topic: Feedback for version 1.0a here
Replies: 105
Views: 64896

Re: Feedback for version 1.0a here

Hi Steve,

Many thanks for the detailed answer. Cheers, Mike.
by Mike H
Thu Apr 04, 2019 5:41 pm
Forum: General
Topic: IF amplifier.
Replies: 0
Views: 1288

IF amplifier.

A quick question for someone 'in the know'.... For the RSP2 (at least), is the IF amplifier with AGC implemented as an actual voltage amplifier with controllable gain? That is, is it a circuit that takes in an input signal as a voltage and makes turns it into a larger voltage? Or is it a control for...
by Mike H
Wed Apr 03, 2019 6:30 pm
Forum: Spectrum Analysis
Topic: Feedback for version 1.0a here
Replies: 105
Views: 64896

Re: Feedback for version 1.0a here

Hi Steve, I found some more info on the peak at 103.85MHz... It is repeatable, but... If I start the analysis with averaging using the 'Start' button on the top panel then the peak is not present. However, if I cycle through the reference values while in averaging mode then after 10-20 changes in th...
by Mike H
Wed Apr 03, 2019 5:35 pm
Forum: Spectrum Analysis
Topic: Feedback for version 1.0a here
Replies: 105
Views: 64896

Re: Feedback for version 1.0a here

Hi Steve, Yes, that particular peak at 103.85MHz @ -30dBm reference was the aspect that set me off thinking that something was wrong and some more complicated interaction was going on. In a way, I feel comforted that the peak at 103.85MHz is not expected behaviour (by you at any rate), and I will tr...
by Mike H
Tue Apr 02, 2019 10:15 am
Forum: Spectrum Analysis
Topic: Feedback for version 1.0a here
Replies: 105
Views: 64896

Re: Feedback for version 1.0a here

-80dBm.png
-80dBm.png (108.6 KiB) Viewed 6192 times
-50dBm.png
-50dBm.png (105.92 KiB) Viewed 6192 times
-60dBm.png
-60dBm.png (105.26 KiB) Viewed 6192 times
by Mike H
Tue Apr 02, 2019 10:13 am
Forum: Spectrum Analysis
Topic: Feedback for version 1.0a here
Replies: 105
Views: 64896

Re: Feedback for version 1.0a here

Hi Steve, here are the next three plots. The reference level is included in the filename and I have included a snapshot of the settings alongside the main plot Cheers
-20dBm.png
-20dBm.png (102.41 KiB) Viewed 6191 times
-40dBm.png
-40dBm.png (104.91 KiB) Viewed 6191 times
-30dBm.png
-30dBm.png (105.85 KiB) Viewed 6191 times
x2, Mike.
by Mike H
Tue Apr 02, 2019 10:10 am
Forum: Spectrum Analysis
Topic: Feedback for version 1.0a here
Replies: 105
Views: 64896

Re: Feedback for version 1.0a here

I had attached the plots (or so `I was told...) I will try reattaching them in two submissions this time. It is not so much the noise floor that increases, but the shape of the curves as well, especially around marker 'C'. Many thanks, Mike.
by Mike H
Sat Mar 30, 2019 10:42 pm
Forum: Spectrum Analysis
Topic: Feedback for version 1.0a here
Replies: 105
Views: 64896

Re: Feedback for version 1.0a here

Hi, Firstly congratulations on the hard work that must have gone into producing such a useful piece of software as this. This looks like it will be very useful tool for me and is much appreciated. I have come across some confusing behaviour that I thought it worth mentioning. My understanding is tha...
by Mike H
Sun Mar 17, 2019 11:11 pm
Forum: SDRplay related
Topic: RSP 3D Printed Hardware
Replies: 2
Views: 1854

Re: RSP 3D Printed Hardware

The 3D printer files for the frame, sidebox and both together for a single print cycle are available in a variety of formats (STL, GCODE & 3mf) at:

https://www.sdrplay.com/docs/MikeHarwoo ... rFiles.zip

Please email me at Mike@Harwood.org.uk if you need anything else.
by Mike H
Sun Mar 17, 2019 4:57 pm
Forum: SDRplay related
Topic: RSP 3D Printed Hardware
Replies: 2
Views: 1854

RSP 3D Printed Hardware

Having got fed up with my RSP2 lying around on the desk or perched on top of a paper shredder(!), I decided to design and use my 3D printer to make a frame/box that could attach the RSP2 to the wall and out of the way. This would be close to where the RF ground enters the house and as far away from ...