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HOWTO
Most of the steps require root access to the Ubuntu system and basic knowledge of Linux system. Create directory, for example /root/tbs and copy the following file to it:
- dvb-fe-cx24116.fw (CX24116 DVB-S2 Demodulator firmware)
- linux-tbs-all.tar.bz2 (source code of S2API Linix drivers for TBS products)
- szap-s2.tar.bz2 (szap tool compatible with new DVB-S2 aware S2 API for Linux)
- scan-s2.tar.bz2 (scan tool compatible with new DVB-S2 aware S2 API for Linux)
- astra_szap-s2.conf (example configuration file for szap-s2 with only few transponders from Astra 19.2E satellite)
- astra_scan-s2.conf (example configuration file for scan-s2 with only few transponders from Astra 19.2E satellite)
from now on all step are executed in /root/tbs, i.e. "cd /root/tbs" unless it's stated otherwise.
I. install the CX24116 firmware file "dvb-fe-cx24116.fw" to /lib/firmware/:
mv dvb-fe-cx24116.fw /lib/firmware/
II. build, install and load S2API Linix drivers for TBS6920 and TBS8920 cards
II.0 (optional in case packages aren't already installed) install prerequisite packages using Ubuntu package manager:
apt-get update
apt-get install linux-headers-`uname -r`
apt-get install linux-kernel-devel
II.1 extract linux-tbs-all.tar.bz2 archive:
tar xjvf linux-tbs-all.tar.bz2
II.2 go to driver source code directory:
cd linux-tbs-all/
II.3 build and install the driver:
II.4 make && make install
II.5 reboot in order to load the newly installed driver:
shutdown -r now
II.6 after reboot check that the newly installed driver is loaded correctly:
(for TBS 6920 only)
dmesg | grep cx23885
if everything is OK, the output from the above command should be similar to:
cx23885 driver version 0.0.1 loaded
cx23885 0000:04:00.0: PCI INT A -> GSI 32 (level, low) -> IRQ 32
CORE cx23885[0]: subsystem: 6920:8888, board: TurboSight TBS 6920 [card=14,autodetected]
cx23885_dvb_register() allocating 1 frontend(s)
cx23885[0]: cx23885 based dvb card
DVB: registering new adapter (cx23885[0])
cx23885_dev_checkrevision() Hardware revision = 0xb0
cx23885[0]/0: found at 0000:04:00.0, rev: 2, irq: 32, latency: 0, mmio: 0xdc000000
cx23885 0000:04:00.0: setting latency timer to 64
(for TBS 8920 only)
dmesg | grep cx88
III. here are some basic instructions how to test locking to transponder with "szap-s2":
III.1 extract "szap-s2.tar.bz2" archive:
# tar xjvf szap-s2.tar.bz2
III.2 go to szap-s2 source code directory:
# cd szap-s2
III.3 build szap-s2:
# make
III.4 szap-s2 uses configuration files (see configuration file "astra_szap-s2.conf" for example) - they are simple text files and each line of them contains information about a channel, for example:
BBC:11597:v:0:22000:163:92:10050
this means:
- channel name is BBC, you can choose whatever you want for channel name, it's just a text string
- channel frequency is 11597MHz
- transponder polarization is V(ertical)
- 0: use first LNB (if you have only one LNB, it's always 0, if you have DiSEqC switch and several LNBs connected to that switch it could be number greater than 0 and showing which LNB to use, i.e. to which DiSEqC switch port desired LNB is connected)
- 22000: symbol rate
- 163: Video PID (VPID)
- 92: Audio PID
- 10050: Service ID (SID)
the example is for "BBC World" channel on Astra 19.2E satellite. you can find all those numbers for example here:
http://www.lyngsat.com/astra19.htmlIII.5 write your szap-s2 configuration files (or create one using S2API compatible version of the "scan" tool)
III.6 use szap-s2 examples:
- to lock to DVB-S transponder: ./szap-s2 -c astra_szap-s2.conf -p -r -S 0 "BBC"
- to lock to DVB-S2: ./szap-s2 -c sample.conf -p -r -S 1 -M 5 -C 23 "CHAN_NAME"
where "-S 1" is DVB-S2, "-M 5" is 8PSK modulation, "-C 23" is FEC 2/3
IV. here are some basic instructions how to scan transponder with "scan-s2":
IV.1 extract "scan-s2.tar.bz2" archive:
# tar xjvf scan-s2.tar.bz2
IV.2 go to scan-s2 source code directory:
# cd scan-s2
IV.3 build scan-s2:
# make
IV.4 scan-s2 uses configuration files (see configuration file "astra_scan-s2.conf" for example) - they are simple text files and each line of them contains information about a transponder, for example:
S1 11778000 V 27500000 3/4 35 QPSK
S2 11362000 H 22000000 2/3 35 8PSK
where:
- "S1" or "S2" indicates the delivery system, i.e. either DVB-S or DVB-S2
- second parameter is the frequency, in our example respectively 11778000 kHz or 11362000 kHz
- "V" or "H" indicates that the polarization: V(ertical) or H(orizontal)
- 5th parameter is the FEC value, in our example respectively 3/4 or 2/3
- the next parameter is the Roll-off factor, "35" in our example
- and the last parameter is the modulation, in our example respectively QPSK or 8PSK
the Roll-off factor and the modulation are mandatory for DVB-S2 cards and without them the result is just unpredictable, most probably - no lock. the reason for that is that DVB-S2 supports several modulation like QPSK, 8PSK, etc and 3 Roll-off factors : 0.20, 0.25, 0.35 (respectively 20, 25, 35 in the configuration file). DVB-S supports only one Roll-off factor - 0.35 and so for DVB-S transponders Roll-off factor is always 35 in the configuration file
IV.5 write your scan-s2 configuration files
IV.6 use scan-s2 to scan a tranposnder
موضوع: پرسش و پاسخهای رایج FAQ (دفعات بازدید: 170593 بار)
