MODCOD

[EnoSat]

13E/11355V now test MODCOD1 and MODCOD2 for Invatech.
low signal for MODCOD2


normal signal for MODCOD2 (but my TBS without full support MODCOD)



Can anyone test MODCOD2 processing on their hardware ?

PS: EDISION only sees the first MODCOD

root@osmio4kplus:~# dvbsnoop -s pidscan
dvbsnoop V1.4.56 -- https://github.com/OpenVisionE2/dvbsnoop

---------------------------------------------------------
Transponder PID-Scan...
---------------------------------------------------------
PID found:    0 (0x0000)  [SECTION: Program Association Table (PAT)]
PID found:   16 (0x0010)  [SECTION: Network Information Table (NIT) - actual network]
PID found:   17 (0x0011)  [SECTION: Service Description Table (SDT) - actual transport stream]
PID found:   18 (0x0012)  [SECTION: Event Information Table (EIT) - actual transport stream, present/following]
PID found:   20 (0x0014)  [SECTION: Time Date Table (TDT)]
PID found:  870 (0x0366)  [unknown]
PID found: 2060 (0x080c)  [SECTION: DSM-CC - private data section  // DVB datagram]
PID found: 8000 (0x1f40)  [SECTION: Program Map Table (PMT)]
PID found: 8001 (0x1f41)  [SECTION: IP/MAC Notification Table (INT) [EN 301 192]]
root@osmio4kplus:~#

VMA play two m3u8 (224.1.1.100_16101 and 224.1.1.100:16103)

 

[Old Satterhand]

Hi @EnoSat
I'm not sure what you are looking for.
This is a transponder broadcasting in VCM mode.
The 2 modcods carry probably the same services but in different resolutions/bitrate.
The signal strength should be the same for both modcods but 16APSK 5/6 needs at least 11,6 dB CNR ( QPSK 1/4: -2.4 dB ).
My DVB-S2 analyser shows both streams but 16APSK with packet loss due to bad weather.

 

[EnoSat]

VCM is a different principle than MODCOD. 13E/11355V operates in CCM mode.

 

[Old Satterhand]

I looks like I have to go back to the DVB academy.
For me modcod is short for modulation & coding. Sorry for the hick-up.

 

[Old Satterhand]

@EnoSat
I asked every dvb expert I know and got the same answer: it's short for MODulation and CODing.
There is no 'principle' with that name and it is no part of CCM.
2 modcods in 1 transport stream can never be Constant Coding & Modulation.
Maybe your software is in error or the transport-stream is wrongly flagged?

a Summary of all MODCODS used in DVB-S2 and there spectral efficiency:


More info in the attached document.

 

[EnoSat]