Signal 74% no lock

[sky]

The problem is on the PORT A and PORT B, on the C and D LOCK is present.

file amos_scan after scan-s2 on port C:

Unian-TV;SPACECOM:11722:hC34M2O35S0:S0.0W:27500:1281:1282:0:0:1:4369:1:0
OTV;SPACECOM:10722:hC34M2O35S0:S0.0W:27500:513:514:0:0:2:4369:1:0
1PLUS1;SPACECOM:10722:hC34M2O35S0:S0.0W:27500:769:770:773:0:3:4369:1:0
TV KYIV;SPACECOM:10722:hC34M2O35S0:S0.0W:27500:1025:1026:0:0:4:4369:1:0
CiTi;SPACECOM:10722:hC34M2O35S0:S0.0W:27500:257:258:0:0:5:4369:1:0
TONIS;SPACECOM:10722:hC34M2O35S0:S0.0W:27500:1537:1538:0:0:6:4369:1:0
UBR;SPACECOM:10722:hC34M2O35S0:S0.0W:27500:1793:1794:0:0:7:4369:1:0
Menu TV;SPACECOM:10722:hC34M2O35S0:S0.0W:27500:2049:2050=UKR:0:0:8:4369:1:0

[root@iptv dvb-s]# szap-s2 -c amos_scan -n 1 -H -a 0
reading channels from file 'amos_scan'
zapping to 1 'Unian-TV;SPACECOM':
delivery DVB-S, modulation QPSK
sat 0, frequency 11722 MHz H, symbolrate 27500000, coderate 3/4, rolloff 0.35
vpid 0x0501, apid 0x0502, sid 0x0000
using '/dev/dvb/adapter0/frontend0' and '/dev/dvb/adapter0/demux0'
status 00 | signal 74% | snr 0% | ber 0 | unc 0 |
status 00 | signal 74% | snr 0% | ber 0 | unc 0 |
status 00 | signal 74% | snr 0% | ber 0 | unc 0 |
status 00 | signal 74% | snr 0% | ber 0 | unc 0 |
status 00 | signal 74% | snr 0% | ber 0 | unc 0 |