El Miércoles, 20 de Septiembre de 2006 11:55, Patrick Boettcher escribió: > Hi, > > On Wed, 20 Sep 2006, Jose Alberto Reguero wrote: > > I made a experiment, and take the agc params from > > dib3000p_mt2060_agc_config from dibusb-common.c line 170 and put in > > bristol_dib3000p_mt2060_agc_config from dib0700_devices.c line 26 except > > ".setup" and I have much beter results. I can tune to this frquency with > > LNA off and with LNA on with good results (similar ber, a little better > > with LNA on). > > Uh la la. Never ever do that. AGC settings are (most of the time) > determined by a process of calibration (checking for sensitivity, high > power, backoff in different adjacent channel scenarios (Nordig, MBRAI)). > The settings which are there are optimized for the nova-t 500 (knowing > that there is an LNA). > > If you now use different settings, they may work very good for you, but > most likely very bad for others (with other reception conditions). The AGC > calibration is always a compromise to achieve usable reception for > everyone. > > That reception is working with LNA on and off is, btw, no indicator. The > LNA should be used, if you live in an area, where signal are very low. > That the Nova-T 500 has only one LNA for both channels is a bit unlucky, > that's why it is now switchable with a module parameter. > > So once again: unless one is not 100% sure of what he/she is doing, DO NOT > TOUCH AGC parameters. Otherwise it will be quite impossible to support > people reporting bad reception quality. > > best regards, > Patrick. > I try this because I still have problems with some frecuencys with LNA off with your params. Other frecuencys are ok. Maybe there is something wrong in the AGC params? Thanks. Jose Alberto _______________________________________________ linux-dvb mailing list linux-dvb@xxxxxxxxxxx http://www.linuxtv.org/cgi-bin/mailman/listinfo/linux-dvb
