For NB transponder the signal level has to be hi and for WB lo with vertical polarization
For WB transponder the signal level has to be hi and for NB lo with horizontal polarization
Software DVB-S demodulator
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V OR H Please make this measurement RF gain automatic OFF and AGC OFF ....
How do you change from vertical to horizontal ?
Have you adjusted the skew of your LNB ?
LNB type ?
Several times I see in your pictures that you forgot to activate the Carrier Recovery .
73 from ON1RC
Chris
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I think the problem can be solved by replacing the sdr receiver. I would to know: what brand and model of usb sdr receiver are you using? Thank you
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I think the problem can be solved by replacing the sdr receiver. I would to know: what brand and model of usb sdr receiver are you using? Thank you
Your sdr receiver is sure not the problem! I use the exact same type here
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Probably the signal at the input of the sdr usb receiver is not sufficient for the datv. Have you measured the signal strength at 741.500 MHz? -
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Surprise! The sdr receiver is not RTL 2832 OEM, actually what I'm using is RTL 2838 UHIDIR. DB8TF, please what is your sdr? Thank you
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Excuse me, this is my plant: offset dish 80 centimeters. Dual twin LNB with quartz, gain 60 dB, noise figure 0.3 dB. Coaxial cable for tv, inserter for the supply voltage of the lnb, rtl sdr 2838, pc. In the picture the level of signals in narrow band
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Yes, I did numerous tests for the skew of the lnb until I found the best location. I changed the horizontal and vertical polarization. The length of the coaxial cable is 30 meters, the total attenuation is 5 dB. The signal received in narrow band is S 9 + 10/20. The antenna is definitely pointed correctly with satellite TV signal meter.
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Seams like your RX signal is to weak.
On the NB you have a system noise of S5,8 > 34,8dB
The lower Beacon has S9+13 > 67dB
So your Beacon SNR is abt 32,2 dB
On my dish (120cm) the lower beacon has 40-41dB SNR (depending on the Console BW)
Zoom out of the NB (2,4MHZ BW) and look if you can see the TP shoulders.
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I have the same feeling as DB8TF ... that the RX level is too low. (The DATV reception is sharp ... and the pointing of the antenna is very important !!!) You can still do another test with a bandwidth of 1800000 see PHOTO
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Good morning: How is possible find the gui-2.0.21 version? Regards de Jabi, ea2aru.
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Hola, yo tengo la versione 2.1.0 Si quieres te la envio por email. 73
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Hello. I send the RTLSDR scanner. With my system the signals in wideband are lower than those in the narrowband.
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Hello. I am pleased announce that the problem has been solved. I changed the polarization of the LNB by changing the supply voltage.
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I can't understand why there is no constellation. The generic RTL 2832 U OEM works great in the narrow band. Can anyone help me to understand where it is error ?
I think I understand your problem you have the BB closed you have to adjust to metta more or less to see the yellow of the beacon the program works well if you have seen my pictures I have also received the mode 8psk
other way reference the SR try to lower 1495
73 Tony ik1hgi
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Hello. I am pleased announce that the problem has been solved. I changed the polarization of the LNB by changing the supply voltage.
i asked you many days ago if you have switched your polarisation:
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Yes, few days ago manually I changed the position of the lnb installed on the satellite dish. Today I changed the polarization by means of the supply voltage: narrowband at 12 volts, wideband at 15 volts. Thanks
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