Digital TV signal analyzer 1750QAM (ANNEX-A/B/C)
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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)