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EUMETCast comparison of transponders 1 & 2

SNR difference   TP1-TP2
SNR difference
TP1 - TP2
From two separate Ayecka SR1

Link Margin (some are calculated)
Transponder 2 - 10A 11263V
TBS6903
TP2
Ayecka SR1 #3
TP2
Transponder 1 - 10A 11263H
Ayecka SR1 #2
TP1
BS/HVS-1 link margin

TelliCast
- lost packets
Transponder 2 - 10A 11263V

HVS-2 lost packets
TP2
PC Lund TBS6903
Transponder 1 - 10A 11263H

HVS-1 lost packets
TP1
PC Kiruna Ayecka SR1 #2

Traffic
Transponder 2 - 10A 11263V
TBS6903
MODCOD: 16APSK2/3
All PIDs
Ayecka SR1 #3
MODCODs: 8PSK3/5 & 16APSK2/3
PIDs: 610 611 &
301 302 500 510 511 512
(historic hangover)
Transponder 1 - 10A 11263H
Ayecka SR1 #2
HVS-1 only
MODCOD: 16APSK2/3
PIDs: 600 601 &
100 300 301 500 511
Ayecka SR1 #2
HVS-1 only
MODCOD: 16APSK2/3
PC Kiruna LAN-2 traffic

SNR - signal-to-noise ratio
Transponder 2 - 10A 11263V
TBS6903
TP2
Ayecka SR1 #3
TP2
Transponder 1 - 10A 11263H
Ayecka SR1 #2
TP1

BER - bit error rate
Transponder 2 - 10A 11263V
TBS6903
TP2
Ayecka SR1 #3
TP2
Transponder 1 - 10A 11263H
TBS6903
TP1
Ayecka SR1 #2
TP1

RF level - higher plot means lower signal
Transponder 2 - 10A 11263V
TBS6903
TP2
Ayecka SR1 #3
TP2
Transponder 1 - 10A 11263H
Ayecka SR1 #2
TP1

Other periods: day week month year

This data is taken from PCs fed by Ayecka SR1 IP and TBS receivers.  The RF feeds are shown in red.  The antenna is pointed to the EUTELSAT 10A satellite at 10° E.  Readings are taken every five minutes, and X-axis times are in UTC.  From late September 2017 the main RF feed has been changed to have a 4-way splitter - there's enough signal to allow this, otherwise an in-line amplifier could have been added.  The four outputs are used to feed the three main receivers.  Output two from the LNB is used purely for HVS-1, three is used for HVS-2, and output four allows direct access to the LNB for polarisation tests, which would otherwise interfere with routine reception.

Multiple receive PCs are fed from the Traffic LAN ports of the Ayecka SR 1 IP receivers on a private LANs (192.168.10.x/20.x) via GS605 Netgear switches, with 1 Gbps network cards added to the receiver PCs.  An Edimax USB2.0-Ethernet adapter is an alternative because of better drivers.  Ayecka SR1 #2 receiver takes only HVS-1, received and processed by PC Kiruna, and received by PC Lund, processed by PC Penguin..  From Feb-2017 PC Lund monitors HVS-1 & HVS-2 with a single-cable TBS6903 dual-tuner PCIe card, but this arrangement had to be abandoned when HVS-2 was switched to a transponder with a different polarisation in late 2002..

The Ayecka SR1 Management ports are connected to the existing 192.168.0.x house LAN, through which management access is possible from any local PC.
 

125 cm antenna with quad-output LNB pointed at EUTELSAT 10A
                  

Output 1     Output 2   Output 3       Output 4
|| ||     || ||

4-way splitter

  || 2-way splitter     ||
DC-pass        RF only      RF only   RF only  || DC-pass   RF only  ||
||     ||     ||     || || || || ||
Ayecka
SR1  #1
BAS only
(spare)
TBS5927
(spare) (spare)
 
 
Ayecka
SR1  #2
HVS-1 only
TBS6903
dual-tuner
PCIe
Ayecka
SR1  #3
HVS-2 only
TBS5925
box
USB      pass-through
     | | ||
1 Gbps
Ethernet
1 Gbps
Ethernet
      PCIe
     card
USB 2.0
|
||
||
        | |  Airspy SDR Mini 
 hardware 

  <=====Private 

LAN

==>

<=Private 

LAN

=>        | |
|     | |          | | |
i5-760 PC
Alta
Receive BS
Process BS
i5-4460 PC 
Harstad
Receive BS
i5-8400 PC
Penguin
BS recv & process
HVS-1 process
i7-4770K PC
Kiruna
Process BS
HVS rec. & proc.
 i5-6400 PC 
Lund
Recv HVS-1
Recv HVS-2
 Tablet test PC
Vega
BDADataEx  CrazyScan
SDR#  Spectrum Spy

Transponder spectrum & constellation comparison

 
Copyright © David Taylor  Edinburgh SatSignal home page Last modified: 2022 Nov 20 at 06:49:29