Meaning of fields in .frq file?

[rkulagow]

This is from a DVB-S scan:

CH:101 onid:2 tsid:2047 sid:6471 frq:10803000 rate:22000 mod:20 pol:1 fec_rate_in:6 pilot:0 sat:0 ctrl:1 #:BBC 1 North East

Channel, the onid/tsid/sid, frq and rate are easy enough.

What's mod:20, pol:1 and the others mean?

Thanks.

[Narflex]

Qian would know...I sure don't....you can always look at the source code (fec_rate probably doesn't appear that many times).

[Narflex]

OK, I found it.

mod is modulation
pol is polarization

[bclenney]

FEC is Forward Error Correction

[rkulagow]

Originally Posted by bclenney

FEC is Forward Error Correction

Sorry, should have been more specific.

Yes, I know that fec is forward error correction, but there are different fec schemes, so is what I pasted above "2/3", "5/6", etc.

Is there a place where I can see what the pasted values convert to? Other applications don't try to encode it, so a scan from something like NextPVR will just tell me that it's "5/6" or whatever.

That's what I'd like to know; what the other fields translate to.

[JREkiwi]

There's a key that is created at the top of the file although it doesn't list mod:20

#fec_rate:     1:fec1/2, 2:fec2/3, 3:fec3/4, 4:fec3/5, 5:fec4/5, 6:fec5/6, 7:fec5/11, 8:fec7/8 9:fec8/9
#fec:          1:VBC, 2:RS/2048, 3:maximum	
#polarisation: 1:linear_H, 2:Linear_V, 3:Circular_L, 4:Circular_R
#modualtion:   0:QPSK, 1:16QAM, 2:32QAM, 3:64QAM, 4:128QAM, 5:256QAM, 6:QAM_AUTO, 7:8VSB 8:16VSB 
#ctrlbits:     0:diasable, 1:enable, 3:encrypted

John

[rkulagow]

Thanks, that's more like what I intended to ask about.