IS IT POSSIBLE TO USE 1.8 VSAT FOR TV

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Ex Member Ex Member	Jun 4^th, 2007 at 12:07pm HI ERIC, PLS IS IT POSSIBLE TO USE A 1.8 METER C-BAND VSAT TO BOTH INTERNET AND CABLE INSEAD OF HAVING A SEPERATE 90CM KUBAND DISH FOR THE CABLE TV WHILE THE C-BAND REMAIN FOR INTERNET ACCESS. PLS ADVICE. THANKS, SAM.
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Eric Johnston

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Reply #1 - Jun 4^th, 2007 at 1:28pm

If the Ku band TV programming comes from a different, but close by, satellite I would try putting a TV Ku band feed/LNB by the side of the main C band feed/LNB/BUC. Keep the main dish and C band system optimised for the tx-rx VSAT operation and experiment with Ku band receive-only feed positions to see if you can get a signal. The new feed will need to be on the opposite side to the new satellite, since the dish is a reflector.

If the Ku band TV and C band VSAT operation are on the same satellite then an expensive C/Ku band feed is a theoretical possibility. �The danger is that a dubious C/Ku band feed might degrade the 6 GHz transmit cross polarisation or increase off-axis sidelobe emissions and cause you to interfere with someone else's service. �It will be much safer to have a dedicated 90cm dish and Ku band feed/LNB for the TV.

Best regards. Eric.

« Last Edit: Jun 4^th, 2007 at 7:15pm by Eric Johnston »

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Reply #2 - Jun 6^th, 2007 at 12:32pm

HI ERIC,
PLS BELOW IS AN ERROR MESSGAE THAT IM HAVING WITH MY IDIRECT 5000 MODEM. I CANT RUN COMMANDS AS A RESULT OF THIS.


iDirect Linux 2.4.24-uc0-iDirect0
Kernel 2.4.24-uc0-iDirect0 on an armv5b

iDirect login: root
Password:
Linux iDirect 2.4.24-uc0-iDirect0 #1 Thu Feb 1 11:13:30 EST 2007 armv5b unknown
# telnet 0

Entering character mode
Escape character is '^]'.

Username: admin
Password: *********

[ErrorStack] admin@telnet:127.0.0.1;1024
> help
DID Show modem identification number
eth Show the output of ifconfig command
netstat    Show the output of a netstat command
nmsr Debug NMS Reportin
ps    Show the output of the ps command
status    Display FIPS status

[ErrorStack] admin@telnet:127.0.0.1;1024
> eth
lo RX Bytes: 6947 Packets: 123 Errors: 0 Drops: 0
   RX FIFO: 0 Frame: 0 Compressed: 0 Multicast: 0

   TX Bytes: 6947 Packets: 123 Errors: 0 Drops: 0
   TX FIFO: 0 Collisions: 0 Carrier: 0 Compressed: 0

teql0 RX Bytes: 0 Packets: 0 Errors: 0 Drops: 0
   RX FIFO: 0 Frame: 0 Compressed: 0 Multicast: 0

   TX Bytes: 0 Packets: 0 Errors: 0 Drops: 0
   TX FIFO: 0 Collisions: 0 Carrier: 0 Compressed: 0

tunl0 RX Bytes: 0 Packets: 0 Errors: 0 Drops: 0
   RX FIFO: 0 Frame: 0 Compressed: 0 Multicast: 0

   TX Bytes: 0 Packets: 0 Errors: 0 Drops: 0
   TX FIFO: 0 Collisions: 0 Carrier: 0 Compressed: 0

gre0 RX Bytes: 0 Packets: 0 Errors: 0 Drops: 0
   RX FIFO: 0 Frame: 0 Compressed: 0 Multicast: 0

   TX Bytes: 0 Packets: 0 Errors: 0 Drops: 0
   TX FIFO: 0 Collisions: 0 Carrier: 0 Compressed: 0

sit0 RX Bytes: 0 Packets: 0 Errors: 0 Drops: 0
   RX FIFO: 0 Frame: 0 Compressed: 0 Multicast: 0

   TX Bytes: 0 Packets: 0 Errors: 0 Drops: 0
   TX FIFO: 0 Collisions: 0 Carrier: 0 Compressed: 0

ixp0 RX Bytes: 0 Packets: 0 Errors: 0 Drops: 0
   RX FIFO: 0 Frame: 0 Compressed: 0 Multicast: 0

   TX Bytes: 0 Packets: 0 Errors: 0 Drops: 0
   TX FIFO: 0 Collisions: 0 Carrier: 0 Compressed: 0

ixp1 RX Bytes: 23814 Packets: 177 Errors: 0 Drops: 0
   RX FIFO: 0 Frame: 0 Compressed: 0 Multicast: 0

   TX Bytes: 378 Packets: 5 Errors: 0 Drops: 0
   TX FIFO: 0 Collisions: 0 Carrier: 0 Compressed: 0

[ErrorStack] admin@telnet:127.0.0.1;1024
>
THANKS.
SAM

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Eric Johnston

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Reply #3 - Jun 6^th, 2007 at 10:22pm

The eth command appears to display the output of the ifconfig command. �It is showing a variety of router interfaces.

Here is a link that may help: https://www.computerhope.com/unix/uifconfi.htm �I am guessing that ifconfig on iDirect works similar to linux.

Maybe it is possible to get more details about interface lo ? e.g. ifconfig lo �What is interface lo ? � Is this your LAN connection with a PC ? �Is the ethernet cable plugged in properly, pins undamaged ? �

netstat -i might be interesting.
see https://www.faqs.org/docs/linux_network/x-087-2-iface.netstat.html

If there are packets with errors are these coming over the satellite or from the local LAN. �If you suspect the satellite link try to extract information out about the receive satellite transmission, like bit error rate before and after FEC. �Try running a long LAN ping 127.0.0.1 -t to the modem. There should be no errors.

Please would someone else with a knowledge of iDirect help answer this. �Many thanks.

Best regards, Eric.

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