[linux-dvb] Succed tuning Ku-Band freq, but failed tuning C-Band

Johan firdianto johanfirdi at jmn.net.id
Tue Dec 20 03:26:57 CET 2005


For C-Band, LO is 5150 Mhz.
 I have tried, to enter parameter -l C-BAND, but it doesn't have effect.
Also, I have tried to enter directly L-BAND freq to scan program utility.
BTW, what does it mean Inversion ?
if Inversion option on, we should input the parameter L-BAND or C-BAND
freq ?.
If inversion option off, so.. ?
anybody here could explain to me.
Thanks.

Johan

> Marcus Metzler wrote:
>
>>>>>>>"Johan" == Johan firdianto <johanfirdi at jmn.net.id> writes:
>>>>>>>
>>>>>>>
>>
>>    Johan> Dear guys, some days ago, I posted about failed tuning
>>    Johan> using Skystar2 PCI rev. 2.6D.  I tuned the dvb pci using
>>    Johan> C-Band freq, I get never lock.  But when I tuned the dvb
>>    Johan> pci using Ku-Band freq, it works successfully.  I'm using
>>    Johan> dvbtune (version 0.5) and linux-dvb-apps from linuxtv.org,
>>    Johan> both of programs works fine in tuning Ku-Band, but not
>>    Johan> C-BAND.  So, I guess there's broken code in dvbtune or scan
>>    Johan> utilities.  Any guys here have tried to tune C-BAnd Freq or
>>    Johan> having same experience with me ?
>>
>>Since you need a C-Band LNB, which is not commonly used in
>>Europe for DVB-S, I doubt that many people have tried it.
>>I guess dvbtune does not use the correct offsets for the LNB.
>>The driver gets the transponder frequency minus the offset frequency
>>of the LNB as parameter,  so you have to see if you can set the offset
>>frequency in dvbtune by program parameters, or you have to go into the
>>code and change the offset. You may also try to switch inversion on.
>>
>>Marcus
>>
>>
>>
>
> what are  the LOFS for C-band?
>
>
>
>
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