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Norsat filter installation 3.754-4.200 MHz on satellite dish with reception frequency in band C







 

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WHY USE THE ONE PORT RETURN LOSS MEASUREMENT INSTEAD OF THE TWO PORT TRANSMISSION LOSS MEASUREMENT

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How to tune a Coaxial Filter     In Fig.1 is shown the connection between Spectrum Analyzer-Rhotector (VSWR Bridge ) and a Coaxial Filter:                                                             Fig. 1. Connections between the instruments.   With this kind of connection you can measure the Return Loss or the Standing Wave Ratio of the coaxial filter at port F (shown in Fig. 1), Table 1 reports the relationship between the R.L and the VSWR. Table 1. Return Loss and SWR.     The Coaxial Filter is tuned by rotating the four knobs named Lin, Lacc1, Lacc2 and Lout, as in Fig 2. Delta Meccanica provides a graduation and a table for  the first position where is better to start the tuning. Fig. 2. Tuning Kobs. Delta Meccanica provides a graduation and a table for  the first position where is better to start the tuning. Table 1 shows the settings on two commonly used models of Delta Meccanica Coaxial Filters.                                                            
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HOW TO REPAIR THE LNB POWER SUPPLY ON THE SAT RECEIVERS PROFLINE TRSrm

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  HOW TO REPAIR THE LNB POWER SUPPLY   ON THE SAT RECEIVERS PROFLINE TRSrm AT FIRST WE HAVE TO TELL THAT YOU THAT IF YOU HAVE THIS KIND OF FAILURE 99% OF THE TIME , DEPENDS FROM THE BAD WIRING OF THE EQUIPOTENTIAL GROUND   SYSTEM . THIS MEANS THAT BEFORE CHANGING THE RECEIVER , YOU HAVE TO CHECK TO HAVE THE GROUNDING KIT ON THE SAT INPUT CABLE POSSIBLY BEFORE COMING INTO THE SITE , CONNECTED TO A GOOD COMMON EQUIPOTENTIAL GROUND POINT AND THE CASE OF THE RECEIVER ALSO CONNECTED WITH HIS GROUNDING SCREW TO THE SAME POINT OR AT LEAST TO THE COMMON GRUNDING POINT OF THE RACK THAT HAS THEN TO BE CONNECTED TO THE GOOD COMMON EQUIPOTENTIAL GROUND POINT . OF COURSE ALSO THE DISH AND THE LNB HAS TO FOLLOW THE SAME PRINCIPLES . IF NOT , YOU WILL CONTINUE TO DESTROY THE RECEIVER WITH LIGHTNINGS AND YOU ARE LIABLE FOR THIS DAMAGE . …………………………………………………………………………………………………………… The Profline TRSrm receivers are the most common SAT receivers we used all around .There are two types : A)    
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HOW TO USE AN RTL KEY , HDSDR , VB HIFI CABLE AND SDR SPY FOR A FULL RDS FM DECODER

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Having already installed the software HDSDR for the RTL Key , you can add VB Cable and SDR SPY to build a full RDS FM Decoder . This are the link where you can download all what is needed :  1) HDSDR :  https://www.hdsdr.de/ 2) VB Audio HIFI Cable :  http://vincent.burel.free.fr/VirtualAudioApps/HiFiCableAsioBridgeSetup_v1007.zip 3) RDS SPY :  http://www.rdsspy.com/   Download :  http://rdsspy.com/download/mainapp/RDS_Spy_1.03_Setup.exe Following some picture of the settings ( I think I will make a video about )  And in the two following images the main results that you can get :  Thanks a lot to Giampiero Bernardini and Emanuele Pelicioli for the support in the settings . Claudio Re 
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