Hello,
I have Rohde & Schwarz SFU signal generator until 11.8.2008 at work so I run some tests on my KNC DVB-S2 card to se if it also has problems with symbol rates everybody complains.
I have got these results with frequency set to 12303000MHz and changing symbol rate and FEC CODE RATE. I just measured upper setting of symbol rate when problems started. When I tried lower sybmol rates from 1000000 and up I did not get any problems. All this is measured in DVB-S2 standard.
Constellation QPSK - FEC 2/3I have Rohde & Schwarz SFU signal generator until 11.8.2008 at work so I run some tests on my KNC DVB-S2 card to se if it also has problems with symbol rates everybody complains.
I have got these results with frequency set to 12303000MHz and changing symbol rate and FEC CODE RATE. I just measured upper setting of symbol rate when problems started. When I tried lower sybmol rates from 1000000 and up I did not get any problems. All this is measured in DVB-S2 standard.
Symbol rate Result
29600000 LOCK
29700000 NO LOCK
Constellation 8PSK - FEC 2/3
Symbol rate Result
30000000 LOCK
30100000 NO LOCK
Constellation QPSK - FEC 3/4
Symbol rate Result
22200000 LOCK
22300000 LOCK for 1 second - Then loses LOCK
Constellation 8PSK - FEC 3/4
Symbol rate Result
30000000 LOCK
30100000 LOCK for 1 second - Then loses LOCK
Constellation QPSK - FEC 4/5
Symbol rate Result
22200000 LOCK
22300000 LOCK for 1 second - Then loses LOCK
Constellation QPSK - FEC 5/6
Symbol rate Result
22200000 LOCK
22300000 LOCK for 1 second - Then loses LOCK
Constellation 8PSK - FEC 5/6
Symbol rate Result
30000000 LOCK
30100000 LOCK for 1 second - Then loses LOCK
Constellation QPSK - FEC 8/9
Symbol rate Result
22200000 LOCK
22300000 LOCK for 1 second - Then loses LOCK
Constellation 8PSK - FEC 8/9
Symbol rate Result
24000000 LOCK
24100000 Unstable LOCK, this means that it gets LOCK, then loses LOCK, then this is repeating
--------all between Unstable LOCK
26500000 Unstable LOCK
26600000 NO LOCK
Constellation QPSK - FEC 9/10
Symbol rate Result
22200000 LOCK
22300000 LOCK for 1 second - Then loses LOCK
Constellation 8PSK - FEC 9/10
Symbol rate Result
20000000 LOCK
20100000 Unstable LOCK, this means that it gets LOCK, then loses LOCK, then this is repeating
--------all between Unstable LOCK
24900000 Unstable LOCK
25000000 NO LOCK
If someone have some patches which could solve the problems I will gladly test it for him, but as I said before I have this SFU generator just to 11.8.2008.
Best Regards,
Gregor Fuis
_______________________________________________ linux-dvb mailing list linux-dvb@xxxxxxxxxxx http://www.linuxtv.org/cgi-bin/mailman/listinfo/linux-dvb
