[linux-dvb] Re: [patch] TT C-1200 USB wrong frequency

Thomas Kaiser linux-dvb at kaiser-linux.li
Tue Nov 21 20:57:22 CET 2006


Suur Karu wrote:
> Thomas Kaiser wrote:
>> Suur Karu wrote:
>> > My Technotrend Connect C-1200 USB DVB-C adapter have problem
>> > to tunning to 170MHz (no signal at all), but instead of it I found 
>> missing channels on frequency 178MHz (not listed in NIT table), but 
>> with big disturbance in picture and not stable LOCK (not usable).
>> >
>> > dmesg:
>> > ttusb_init_controller: unknown STC version V 2.5, please report!
>> > ttusb_init_controller: dsp-version: 0.0
>> > DVB: registering new adapter (Technotrend/Hauppauge Nova-USB).
>> > DVB: registering frontend 1 (ST STV0297 DVB-C)...
>> > usbcore: registered new driver ttusb
>>
>> If your device is using the philips tda1316 tuner, i think there is a 
>> problem in setting the correct Band. 162 MHz and above should be band 
>> 2 (Mid-Band). But in dvbc_philips_tdm1316l_tuner_set_params band 1 is 
>> set for frequencies below 200 MHz:
>>     // determine charge pump
>>     tuner_frequency = params->frequency;
>>     if      (tuner_frequency <  87000000) {return -EINVAL;}
>>     else if (tuner_frequency < 130000000) {cp = 3; band = 1;}
>>     else if (tuner_frequency < 160000000) {cp = 5; band = 1;}
>>     else if (tuner_frequency < 200000000) {cp = 6; band = 1;} <<==
>>     else if (tuner_frequency < 290000000) {cp = 3; band = 2;}
>>     else if (tuner_frequency < 420000000) {cp = 5; band = 2;}
>>     else if (tuner_frequency < 480000000) {cp = 6; band = 2;}
>>     else if (tuner_frequency < 620000000) {cp = 3; band = 4;}
>>     else if (tuner_frequency < 830000000) {cp = 5; band = 4;}
>>     else if (tuner_frequency < 895000000) {cp = 7; band = 4;}
>>     else {return -EINVAL;}
>>
>> Try to change to 2:
>>     else if (tuner_frequency < 200000000) {cp = 6; band = 2;}
>>
>>
> 
> Yes! This fixed tuning problem. Thank You!
> 
> Regards,
> SK
> 
> 
> 
> _______________________________________________
> linux-dvb mailing list
> linux-dvb at linuxtv.org
> http://www.linuxtv.org/cgi-bin/mailman/listinfo/linux-dvb
> 
> 

Andrew, can you please add this small change to the official sources?

Thank you, Thomas



-- 
http://www.kaiser-linux.li



More information about the linux-dvb mailing list