Tvheadend

I am using a C-Band dual LNB system with 2 dual output LNBs connected to a 4x4 22khz tone + voltage multiswitch (like one used by directv).

To get signal from LNB1, its is just "C-Band"
However, to get LNB2, we need to supply a 22khz tone, just like in the hi-band of a universal LNB.

I propose to solve the problem by creating an extra LNB type "LO5150 + 22Khz" with the following new code in /src/dvb/dvb_satconf.c:

first mod is in function dvb_lnblist_get(void), we add this:

add_to_lnblist(array, "LO=5150, 22Khz=On");

second mod is in function dvb_lnb_get_frequencies(const char *id, int *f_low, int *f_hi, int *f_switch), we add this to the if statement chain:

else if(!strcmp(id, "LO=5150, 22Khz=On")) {
*f_low = 5150;
*f_hi = 5150;
*f_switch = 3300;
}

the f_switch can be anything under 3400 (lowest freqency in C-Band which is 3.4-4.2Ghz).

What do you think?

Also, I would be willing to help change the configuration system to a dynamic one based on config files so that these things don't have to be hard coded in. However, before I start this I would like to know the rationale behind you original design to code the parameters in C. Was it due to time constraints or a more meaningful reason?