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| HOME > PRODUCTS > VSB/QAM Signal Analyzer 1720VQ |
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¢Â VSB/QAM SIGNAL ANALYZER 1720VQ
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¡á FEATURES
- 1720VSB/QAM Signal Analyzer are
the optimal signal analyzers
to test and measure both
digital
TV signals(8/16VSB) and
digital CATV signals(64/256QAM).
- Frequency Range : 5MHz ~ 870MHz
- Especially, these models give users the capacity to
measure
SNR(MER), EVM, Pre-BER, Post-BER, Constellation Diagram very easily and correctly,
which are very important measurement factors for the digital
signal quality.
- Portable type, Weight less than 1Kg,
Compute interface.
(Data Logger, Printing, Editing)
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¢Â MAIN FUNCTIONS |
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¡á Analog Signal Measurements
- Video / Audio Level
- V / A ratio
- CTB/CSO
- C/N(Video Level : over 50dBuV)
¡á Digital Signal Measurements
- Digital Power Measurement
(VSB, QAM, COFDM, QPSK)
- C/N(Video Level : over 40dBuV)
- MER(SNR)
1) VSB : 15 ~ 34dB(¡¾2dB)
2) 64QAM : 22 ~ 37dB(¡¾2dB)
3) 256QAM : 28 ~ 37dB(¡¾2dB)
- Pre-BER, Post-BER ; 10E-2 ~ 10E-8
- Constellation Diagram : Zoom In
- EVM : 1.5 ~ 8.0%
- VSB&QAM Constellation Patterns & Possible Causes
¡á Tilt Spectrum Analyzer
- Max.15 channels / frequencies
¡á Scan Mode(Indication)
- Video Level - Audio Leve
- Video Level - C/N
- Video Level - PASS(FAIL)
¡á Channel/Frequency Spectrum Analyzer
- Channel Spectrum Span
: Display max. 110 channels at screen
- Frequency Spectrum
1)
Span : 2 ~ 560MHz,
2)
Detect Method : PEAK, AVERAGE
¡á
Reverse Noise Measurement
¡á Memory List
- User can store/edit
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Max. 30 channels
/ frequencies.
¡á Data Logger
- Max. 32 data files can be
saved / Printed
/ edited
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¡á Cloning
- User can make many cloning units.
¡á Auto Timeout
- 5min, 10min, 30min, OFF(continuous)
¡á Battery Voltage Measurement
¡á Line AC/DC Voltage Measurement
- Range : ¡¾10 ~ 110V
- Accuracy : ¡¾1% (¡¾1digit)
- Indication : AC/DC max. 4 figures
¡á Power Supply
- Battery : 9.6V 1600mAH
(AA size, Ni-MH 1.2V x 8)
- Duration : Approx. 5hours
(3hours : Digital measurement)
- Adapter : 220V/60Hz, 15V 500mA
¡á Circumstances
- Useable Temperature : 0 ~ 60¡É
- Humidity : @80%
¡á Mechanical Features
- Dimension : 218§®(H)x105§®(W)x58§®(D)
- Weight : 920g(including battery)
- Graphic LCD : 128 x 64 dot matrix
¡á Standard Accessories
- Carrying Bag
- Carrier Belt
- F-JJ connector
- Users Manual
- RS232C Interface Cable
¡á Optional Accessories
- Car Cigarette Lighter Adapter Cable
- Data Cloning Cable
- Coaxial Cable
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¢Â ANALOG SIGNAL MEASUREMENT |
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Video Level
Audio Level |
CTB/CSO |
Video Level
V / A ratio |
Video Level
C/N |
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¢Â DIGITAL SIGNAL MEASUREMENT |
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Digital Power
Pilot Signal(¡âdB) - VSB |
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Digital Power
C/N |
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¢Â VSB&QAM CONSTELLATION PATTERNS & POSSIBLE CAUSES |
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Signal Strength
Pre-BER
SNR/MER |
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SR
Spectrum Inversion
EVM
Pre-BER / Post-BER
Real Error Counter
Pre-BER measurement time |
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{VSB Mode}
EVM
MER
Constellation Diagram |
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{QAM64 Mode}
EVM
MER
Constellation Diagram |
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{QAM256 Mode}
EVM
MER
Constellation Diagram |
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Example : Constellation 1/4 Zoom |
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