Re: [linux-dvb] Values returned by IOCTL: FE_READ_BER, FE_READ_SNR
Tipically SNRdB = 10 * Log10( SNR ) In this case you have around 40dB of SNRdB, assuming that the value of SNR you got is linear I can't understand what is the representation of bit error rate 2007/10/31, Roberto Granato [EMAIL PROTECTED]: How to interpret the values returned using FE_READ_BER and FE_READ_SNR in a frontend IOCTL? The definition of BER is (error bit)/(total bit) in a time interval, while the definition of SNR is (signal power)/(error power). In the DVB Frontend API I see that BER is a uint32_t and SNR ia a uint16_t. For example, with a poor signal I got the following values: Bit error rate: 304146 Signal strength: 38576 SNR: 22359 Bit error rate: 316097 Signal strength: 37912 SNR: 21588 The interval between two readings is 5 seconds. Why BER is a (so) big number? How to express SNR with dB? Thanks, Roberto Granato ___ linux-dvb mailing list linux-dvb@linuxtv.org http://www.linuxtv.org/cgi-bin/mailman/listinfo/linux-dvb ___ linux-dvb mailing list linux-dvb@linuxtv.org http://www.linuxtv.org/cgi-bin/mailman/listinfo/linux-dvb
[linux-dvb] Unable to load em2880-dvb
Hi, I compile d the official repository http://linuxtv.org/hg/v4l-dvb/ on Ubuntu amd64 em28xx seems to load fine but em2880-dvb won't: dmesg output is: [ 951.511747] em28xx v4l2 driver version 0.0.1 loaded [ 951.511944] usbcore: registered new interface driver em28xx [ 955.263862] em2880_dvb: Unknown symbol em28xx_unregister_extension [ 955.263925] em2880_dvb: disagrees about version of symbol dvb_frontend_detach [ 955.263929] em2880_dvb: Unknown symbol dvb_frontend_detach [ 955.263949] em2880_dvb: Unknown symbol em28xx_register_extension [ 955.263964] em2880_dvb: disagrees about version of symbol dvb_unregister_frontend [ 955.263966] em2880_dvb: Unknown symbol dvb_unregister_frontend [ 955.264020] em2880_dvb: disagrees about version of symbol dvb_register_frontend [ 955.264022] em2880_dvb: Unknown symbol dvb_register_frontend I have the proper firmware for my device (Terratec HybribT USB) installed Any suggestions? Bye!!! ___ linux-dvb mailing list linux-dvb@linuxtv.org http://www.linuxtv.org/cgi-bin/mailman/listinfo/linux-dvb
