Planar CIU-003, Руководство по эксплуатации

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- BER after Reed-Solomon decoder 1.0x10
-4
to 1.0x10
-9
DVB-C channel power threshold
(
preBER
<2.0x10
-4
):
- QAM64 45 dB μ V
- QAM256 50 dB μ V
DVB-C channel automatic frequency control ±0.25 MHz
DVB-T
DVB-T demodulator parameters:
- Modulation type
COFDM
- Subcarrier modulation types QPSK, QAM16, QAM64
- Channel bandwidth 7 MHz, 8 MHz
- Number of channel subcarriers 2k, 4k, 8k
- Guard interval 1/32, 1/16, 1/8, 1/4
- Hierarchical modulation α =1, α =2, α =4
- FEC 1/2, 2/3, 3/4, 5/6, 7/8
DVB-T MER measurement range:
- QAM64, FEC 3/4
18 to 35 dB
MER measurement resolution 0.1 dB
MER measurement accuracy within 50 to 110 dBµV level range ±2.0 dB
BER measurement range:
- BER before Viterbi decoder
1.0x10
-2
to 1.0x10
-9
- BER after Viterbi decoder 1.0x10
-3
to 1.0x10
-9
- BER after Reed-Solomon decoder 1.0x10
-4
to 1.0x10
-9
DVB-T channel power threshold
(
postVBER
<2.0x10
-4
), for
QAM64 , FEC 3/4:
40 dB μ V
Automatic frequency control ±0.5 MHz
General parameters
Warm-up time 5 min
Ethernet interface: RJ-45 / 100BASE-TX
LAN parameters IPv4 / DHCP
Control protocols SNMPv1
Non-volatile memory capacity 80 measurement logs 160
channels each
Continuous stable operation under normal conditions Unlimited
Mean time between failures, no less than 10,000 hours
Average lifetime, no less than 5 years
Rack design 19’’/1U (IEC-297)
Dimensions 483x163x44 mm
Package dimensions 560 х 265 х 165 mm
Weight 2.0 kg
Weight in package 3.0 kg
CIU-003 is powered from AC circuit with 110-265 V voltage and 47-63 Hz frequency
with no more than 5% harmonic content.
Insert two 5x20 mm fuses with nominal operating current of 1.25 A into the fuse-
holder.
1.7. Design and Operation Overview
1.7.1. Principle of Operation
CIU-003 TV Signal Analyzer is a receiver of DVB-C and DVB-T signals with demodulation to the
MPEG-2 transport stream and its further analysis. The input tuner is a triple superheterodyne
receiver with auto or manual frequency tuning. Modulation error ratio MER is measured in the
process of QAM signal demodulation based on vector analysis. Bit error rate BER in digital stream
is determined by means of analyzing the Reed-Solomon and (or) Viterbi decoder operation.
Channel power is measured using analog-to-digital converter after signal peak detection at output
of logarithmic detector of the third IF amplifier.
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