1. FEATURE

DIGITAL TV SIGNAL ANALYZER 1750QAM? The very excellent signal analyzers of choice for field testing of QAM digital signals on your CABLE-TV SYSTEM.

They demodulate and accurately measure the QAM signals carried through the cable system.

They provide the measurement power the field technicians need for the latest 64-256QAM digital technologies and are very simple to use, measuring SNR(MER), EVM, Pre-BER, Post-BER, Constellation Diagram.

• 1750QAM : 5MHz ~ 1000MHz

2. SPECIFICATIONS

FREQUENCY

• FREQUENCY RANGE : 5.0 ~ 1000MHz
• Accuracy : ±10ppm
• Resolution : 10KHz
• LEVEL RANGE : 10dBµV(-50dBmV) ~ 120dBµV(+60dBmV)
• DC ~ 60Hz : 100V DC 또는 RMS
• IF B/W : 3MHz/ 1MHz/ 280KHz / 150KHz
• Accuracy : ±1.5dB (@5 ~ 50˚C)
• Resolutoin : 0.1dB
• Unit : dBμV, dBmV, dBm
• Input Impedance : 75Ω

LEVEL MEASUREMENT MODES

• ANALOG CHANNEL
• Video signal & Audio signal level measurement
• Ratio of video to audio carrier levels(V/A)
• Video sync
• C/N(Carrier to Noise ratio) : Video carrier level is over 50dB
• CTB/CSO measurement offset values : -2.50MHz ~ +2.50MHz
• DIGITAL CHANNEL
• Power measurement in the channel bandwidth by integration method(QAM, VSB, COFDM, QPSK signals)
• Digital Signal Level Measurement
  a. Modulation type : QAM(1024/256/128/64/32/16), VSB, QPSK, OFDM
  b. Annex type : A, B, C
  c. Range of symbol rate : 0.100 ~ 40.000Msps
  d. Range of pilot signal : ±20MHz(only VSB)
  e. Bandwidth : 1 ~ 25MHz selectable (6/7/8MHz automatic setting)
  f. MER, Pre-BER, Post-BER, I/Q Constellation, EVM, etc.
• ANTENNA FOCUS (with Beep sound)
• Dual Measurement Mode : Two channels can be measured.
• DATA LOGGER
• Memory capacity of Storable : Approx. 8Mbyte
• Changeable according to data volume.
• Setup data logger : NAME, TIME, FILE NAME, LOGGER LIMIT
• PC connection : Upload data logger

SPECTRUM MEASUREMENT MODE

• FREQUENCY RANGE : 5 ~ 1000MHz
• LEVEL MEASUREMENT RANGE : 10dBµV(-50dBmV) ~ 120dBµV(+60dBmV)
• Reference level division : 5/10dB unit setting available.
• SPAN : Channel or frequency can be displayed at one screen.
• Span for CHANNEL SWEEP : 18 / 38 / 58 / 110CH
• Span & resolution for FREQUENCY SPECTRUM (reverse noise)
• Functions for FREQUENCY SPECTRUM
• Detection Method : PEAK, AVER (selectable)
• Max. hold : ON/OFF
• GRAPHIC TILT SPECTRUM RANGE : 5 ~ 1000MHz
• Indication(Bar graph) : Tilt Slope, Video/Audio signal level, Digital average power
• Auto arrangement depending on frequencies

LINE AC/DC & BATTERY VOLTAGE MEASUREMENT

• LINE AC/DC VOLTAGE MEASUREMENT RANGE : ±10 ~ 110V
• Resolution : ±1%(±1digit)
• Indication : AC/DC max. 4-digit figure
• BATTERY VOLTAGE MEASUREMENT RANGE : 6V ~ 8V

SCAN MODE (Auto search)

• ACTIVE LEVEL SCAN : MATV & CATV band
• BLIND SCAN
• LEVEL INDICATION
• Analog channel : Video carrier level - Audio carrier level - C/N - Pass/Fail
• Digital channel : Digital average power – MER – Pass/Fail
• Set a search range according to modulation type (QAM, QPSK, etc.)
• The unit compares a signal and modifies it properly, based on ‘a real signal’ and ‘information of channel list’.

SUB-FUNCTIONS MODE

• The measurement data PRINT : Direct acting
• The measurement data CAPTURE : filename.CAP (Approx. 63block)
• FILE DIRECTORY : PRINT/ REVIEW/ DELETE
• CONNECT TO HOST PC : Upload or Download with Hyper-terminal program

CHANNEL PLAN

• Basic 8CH Plans are stored(changeable) : EIA, CCIR, CHINA, JAPAN, AUSTRAL, UK, OIRT, ST2L
• Each CH Plan can store Max. 8Mbyte.
• All data are available to upload or download and changeable by a computer.

POWER SUPPLY

• RECHARGEABLE BATTERY : Li-Poly 7.4V/3800mA
• Battery Indicator : Graphic indication on the screen
• Run time with full charge (over 8 hours) : average 5 hours.
• MAIN ADAPTER
• Input : AC 110-220V/60Hz
• Output : DC 12V/1500mA
• Adapter can be offered according to each country’s conditions.

AUTO TIMEOUT

• The timer setting is programmable to 5/ 10/ 30/ NONE.
• Power turns off automatically when the battery of the unit is low in order to conserve the battery life.

OPERATING CIRCUMSTANCES

• USEABLE TEMPERATURE : 5˚C ~ 50˚C
• HUMIDITY : @80% and below

MECHANICAL FEATURES

• DIMENSION : 218mm W X 105mm H X 58mm D
• WEIGHT : 920g (including batteries)
• GRAPHIC LCD DISPLAY with backlight : 128 X 64 dot matrix
• CASING STRUCTURE : shock-proof plastic (ABS)

STANDARD ACCESSORIES

• USER MANUAL
• CARRYING BAG with SHOULDER STRAP
• Li-poly RECHARGEABLE BATTERY (inside the unit)
• DC ADAPTER
• “F” TYPE CONNECTOR (1ea.)
• USB to DIN-6PIN CABLE : It transmits data to computer or printer

OPTIONAL ACCESSORIES

• Car cigarette lighter adapter cable
• Coxial cable
• Upstream generator(include SPECTRUM MODE)