Search found 128 matches

by Roger
Sun Oct 14, 2018 7:46 pm
Forum: SDRuno
Topic: Audio AGC questions
Replies: 1
Views: 88

Re: Audio AGC questions

Ray, You are correct; there are two AGC loops in the RSP. The first is an IF AGC loop which ensures that the A to D converters (ADC) are getting the best signal level possible which does not cause ADC overflow. The output from the two ADC streams (I and Q) is then digitally downconverted to the freq...
by Roger
Thu Oct 11, 2018 3:58 am
Forum: SDRuno
Topic: IARU Region 1 S-Meter Std Selection
Replies: 2
Views: 108

Re: IARU Region 1 S-Meter Std Selection

From https://en.wikipedia.org/wiki/S_meter#IARU_Region_1_Technical_Recommendation_R.1 "IARU Region 1 Technical Recommendation R.1 defines S9 for the HF bands to be a receiver input power of -73 dBm. This is a level of 50 microvolts at the receiver's antenna input assuming the input impedance of...
by Roger
Tue Oct 09, 2018 7:28 pm
Forum: New Users' experiences
Topic: RSPDuo and Dump1090 - help needed
Replies: 5
Views: 181

Re: RSPDuo and Dump1090 - help needed

Hi all, can anyone help me? I am trying to set up DUMP1090 with RSPduo with/without SDRuno but no success at all. My O/S is Windows 10. I installed ADS-B (DUMP1090) V1.3 and the required API from SDRplay download page. Alessandro, It appears that you are not using the version of DUMP1090 that works...
by Roger
Sat Oct 06, 2018 5:52 pm
Forum: General
Topic: HDSDR And RSP-2: selecting Which Ant. For Program ?
Replies: 5
Views: 186

Re: HDSDR And RSP-2: selecting Which Ant. For Program ?

You need to install the EXTIO.dll so that HDSDR is able to run with your RSP. If you install the SDRplay version of HDSDR it will install everything for you and create startup icons for your RSP2. You can download the RSP version of HDSDR here: https://www.sdrplay.com/downloads/ Uninstall your copy ...
by Roger
Sat Oct 06, 2018 5:37 pm
Forum: SDRuno
Topic: Optimisiation procedure for IF and RF level settings
Replies: 8
Views: 343

Re: Optimisiation procedure for IF and RF level settings

I use a 3 port directional coupler to inject the calibration signal: the antenna signal passes straight through the coupler to the output port; the directional port "mixes" with calibration signal 25 dB down, with the antenna signal and is isolated from the antenna by about 50 dB. The sig...
by Roger
Sat Oct 06, 2018 3:59 pm
Forum: General
Topic: HDSDR And RSP-2: selecting Which Ant. For Program ?
Replies: 5
Views: 186

Re: HDSDR And RSP-2: selecting Which Ant. For Program ?

Click the EXTIO button and select your antenna from the popup. This is also how you configure all the other settings for the RSP.
by Roger
Fri Oct 05, 2018 10:19 pm
Forum: SDRuno
Topic: Optimisiation procedure for IF and RF level settings
Replies: 8
Views: 343

Re: Optimisiation procedure for IF and RF level settings

I did not see in your screenshots where you injected a signal at -75 dBm. That is a strong signal and if your meteor bursts are up to 40 db stronger that means that you are receiving them at -35 dBm!! Here is an update of my previous post that does not use the IF AGC. The easiest way to setup SDRuno...
by Roger
Fri Oct 05, 2018 12:35 am
Forum: SDRuno
Topic: Optimisiation procedure for IF and RF level settings
Replies: 8
Views: 343

Re: Optimisiation procedure for IF and RF level settings

MTG,

Could you please post the frequency band that you are looking for meteor activity and whether it has other signals that need to be considered if the AGC is turned off..

Roger
by Roger
Wed Oct 03, 2018 5:42 pm
Forum: SDRuno
Topic: Optimisiation procedure for IF and RF level settings
Replies: 8
Views: 343

Re: Optimisiation procedure for IF and RF level settings

How do I go about optimisation IF and RF level settings for best SNR? I tried to do this with a RSP2 Pro some 18 months ago and had to give up and use SDR Console. However, I have now got an RSP Duo and this is not supported by Console yet. A few comments: The latest version of SDR-Console 3.03 sup...
by Roger
Wed Oct 03, 2018 5:01 pm
Forum: General
Topic: FT 990 IF output
Replies: 8
Views: 559

Re: FT 990 IF output

ok if i use an Micro Circuits PSC-2-1 or similar (can't see them in the UK) where does the Micro Circuits PSC-2-1 go? Diamond makes a nice splitter and they are available in the UK from ham shops. I just did some tests on a good quality CATV splitter that was rated from 5 to 1000 Mhz. It worked qui...

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