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Les langues disponibles
I
F Qs:
How many programs fit on an RF, COFDM, UHF,
G
8 MHz channel?
The channel's output capacity is measured in MBs and
there is a direct relationship between the following:
Modulation: QPSK < 16 QAM < 64 Q M
G
Code Rate FEC:1/2 < 2/3 < 3/4 < 5/6 < 7/8
G
Save interval IG: 1/4 < 1/8 < 1/16 < 1/32
G
(maximum capacity shown in bold).
The number of programs depends on the amount
G
of information contained in each one.
TROUBLESHOOTING
Effect
"Status" LED colour: Green
"Status" LED colour: Orange
"Status" LED colour: Red
"Comm" LED colour: Orange
TUNER UNLOCKED
PROGR M MISSING
T BLES NOT FOUND
OUT BW EXCEEDED
HW F ILLURE
NO DESCR MBLE
C M NOT PRESENT
CI W RNING
LCN REPE TED
LCN REPE TED
Cause
OK.
Defective Input Signal.
Tuner not synchronized.
Output Service disappeared
from transponder.
No RF output.
Image pixelation.
Hardware failure.
Waiting control data.
Tuner unlocked.
Service not found.
Defective Input Signal.
Image pixelation.
Hardware failure.
Some active service is
chripted.
C M not detected.
C M error (initialization error or
communication error).
LCN repeated.
SID repeated.
17
DVB-T (8MHz)
Modulation Code Rate Tu = 1/4
1/2
4,98
2/3
6,64
QPSK
3/4
7,46
5/6
8,29
7/8
8,71
1/2
9,95
2/3
13,27
16 QAM
3/4
14,93
5/6
16,59
7/8
17,42
1/2
14,93
2/3
19,91
64 QAM
3/4
22,39
5/6
24,88
7/8
26,13
ction
Check 1st IF Input Signal (level, C/N).
Check Frequency, Baud Rate, DVB mode.
Check OUTPUT SERVICES list; Read Services and
check if any program disappeared.
Check if OUTPUT RF is "YES".
Check if Output Mux BW (%) is lower than 92%.
(OUTPUT SERVICES).
Switch OFF and ON again.
Check Communication Bus between Modules and
MCU 8000. OK if there is no MCU 8000 unit.
Check input signal quality
Check Frequency, Bandwidth, DVB mode.
Read Services in OUTPUT SERVICES.
Check Input Signal (level, C/N).
Check if Output Mux BW (%) is lower than 92%.
(OUTPUT SERVICES).
Switch OFF and ON again.
Check rights of active services.
Check C M connection.
Repeat last operation.
Check LCN repetition on active services.
Check the Service ID repetition on active services.
Tab. 4
itrate (Mbps)
Tu = 1/8
Tu = 1/16 Tu = 1/32
5,53
5,85
6,03
7,37
7,81
8,04
8,29
8,78
9,05
9,22
9,76
10,05
9,68
10,25
10,56
11,06
11,71
12,06
14,75
15,61
16,09
16,59
17,56
18,10
18,43
19,52
20,11
19,35
20,49
21,11
16,59
17,56
18,10
22,12
23,42
24,13
24,88
26,35
27,14
27,65
29,27
30,16
29,03
30,74
31,67
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Table des Matières
