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VSAT technology and installation >> Dish pointing and alignment >> internet  satellite downstream problem ( rx o
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Message started by boni_daandel on Mar 16th, 2007 at 2:44pm

Title: internet  satellite downstream problem ( rx o
Post by boni_daandel on Mar 16th, 2007 at 2:44pm
dear all,
please help me to explain and advice about my problem here :
i have 2 site (seperate place ) that using a downstream via satellite and upstream via Local teresterial.
the problem was happen only at  1st site with  downstream issue on receiver DVB pc server.

here the capture on monitoring signal at 1st dvb receiver server that having problem with the internet trafic ( unstable internet trafic, never peak to maximum bandwidth) - using linux redhat and broadlogic DVB pci-card.

1st Server ( having a problem with internet trafic )
------------------------------------------------------------------------
LNB Selected : None
------------------------------------------------------------------------
Data Lock : Locked              Signal Lock : Locked
L-Band Frequency : 1.4075 GHz
Polarization : HORIZONTAL               22 Khz Switch : OFF - Low LNB
Symbol Rate : 45000 (KSyms/s)
Signal Level : 65%
------------------------------------------------------------------------
Viterbi Rate : 3/4              Viterbi Decoded Bit Error Rate : 0.0000
LNB Offset : 0.5080 (MHz)------------------------------------------------------------------------
Active PIDs: [xxxx]
------------------------------------------------------------------------
Serial Number : 0x000000000000003016641DCD
Manufacturer ID : 14F3          Hardware Version : C2
Firmware Version : 7.6.24       BootBlock Version : 7.0.11
Product Name : 2031-16          Product Number : 2030
ABA NIC Driver : Running        NDVBS : Running
------------------------------------------------------------------------

and below is 2nd server with normal trafic internet.

LNB Selected : None
------------------------------------------------------------------------
Data Lock : Locked              Signal Lock : Locked
L-Band Frequency : 1.4075 GHz
Polarization : HORIZONTAL               22 Khz Switch : OFF - Low LNB
Symbol Rate : 45000 (KSyms/s)
Signal Level : 62%
------------------------------------------------------------------------
Viterbi Rate : 3/4              Viterbi Decoded Bit Error Rate : 0.0209
LNB Offset : 0.0273 (MHz)       Signal/Noise Ratio : 3.7475
RSC Error : 53922                       RSUCE Error : 1296
Channel Bit Error Rate : 0.0157
------------------------------------------------------------------------
Active PIDs: [xxxx]
------------------------------------------------------------------------
Serial Number : 0x0000000000000030166408B3
Manufacturer ID : 14F3          Hardware Version : C2
Firmware Version : 7.6.24       BootBlock Version : 7.0.11
Product Name : 2031-16          Product Number : 2030
ABA NIC Driver : Running        NDVBS : Running
------------------------------------------------------------------------

in both capture text, there's a deferent :
- normal receiver  (2nd) the Noise ratio is allways appear.
- problem receiver (1st) the Noise ratio is not appear.  altough the the signal level is better then 2nd receiver ,
 although some time appear, but in long periode time.
 
can any one can help me here ? to explain why this
happen ?

fyi, both site using same LNB, Cable, dish size and type.

and what  the meaning of the LNB offset on the capture ?

wait for valueable feedback to all ppl here,
thanks and regard's


Bonivasius BD



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