4.4 Verify Lock & Reception
The signal lock and quality can be easily tested using femon command:
# femon –H (femon –h for centos)
FE: TurboSight TBS 6908 DVBS/S2 frontend (DVBS)
status SCVYL | signal 85% | snr 86% | ber 0 | unc 0 | FE_HAS_LOCK
status SCVYL | signal 85% | snr 85% | ber 0 | unc 0 | FE_HAS_LOCK
status SCVYL | signal 85% | snr 85% | ber 0 | unc 0 | FE_HAS_LOCK
status SCVYL | signal 85% | snr 86% | ber 0 | unc 0 | FE_HAS_LOCK
status SCVYL | signal 85% | snr 85% | ber 0 | unc 0 | FE_HAS_LOCK
status SCVYL | signal 85% | snr 85% | ber 0 | unc 0 | FE_HAS_LOCK
status SCVYL | signal 85% | snr 84% | ber 0 | unc 0 | FE_HAS_LOCK
After the whole installation is completed and the dvb-eumetcast service is running, the data
reception can be tested using tcpdump command
# tcpdump -nni dummy0
06:58:48.255090 IP 192.168.1.1.51728 > 224.223.222.240.7022: UDP, length 1242
06:58:48.255103 IP 192.168.1.1.42048 > 224.223.222.27.7004: rx type 242 (1242)
06:58:48.255109 IP 192.168.1.1.51728 > 224.223.222.240.7022: UDP, length 1242
06:58:48.255112 IP 192.168.1.1.51728 > 224.223.222.240.7022: UDP, length 1242
06:58:48.255116 IP 192.168.1.1.38955 > 224.223.222.83.8002: UDP, length 1242
06:58:48.255122 IP 192.168.1.1.53211 > 224.223.222.23.6004: UDP, length 1242
06:58:48.255125 IP 192.168.1.1.53211 > 224.223.222.23.6004: UDP, length 1242
06:58:48.255129 IP 192.168.1.1.42048 > 224.223.222.27.7004: rx type 242 (1242)
06:58:48.255132 IP 192.168.1.1.51728 > 224.223.222.240.7022: UDP, length 1242
06:58:48.255135 IP 192.168.1.1.51728 > 224.223.222.240.7022: UDP, length 1242
06:58:48.255138 IP 192.168.1.1.42048 > 224.223.222.27.7004: rx type 242 (1242)
06:58:48.255141 IP 192.168.1.1.51728 > 224.223.222.240.7022: UDP, length 1242
06:58:48.255144 IP 192.168.1.1.51728 > 224.223.222.240.7022: UDP, length 1242
06:58:48.255148 IP 192.168.1.1.51629 > 224.223.222.1.7003: rx type 240 (1242)
06:58:48.255152 IP 192.168.1.1.51728 > 224.223.222.240.7022: UDP, length 1242
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