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KWL Broadcast is Indonesian manufacturer of FM and TV broadcasting equipment. Currently, we are covering four main areas :

  • FM transmitters
  • STL (Studio Transmiter Link)
  • TV transmitters
  • Transmitting antennas and accessories

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news  PRODUCTS
  LCD FM Transmitter / Exciter



BROADBANDED FM EXCITER

30W/70W / 87.5 – 108 MHz

• Suitable for digital audio. FM exciters of last generation are fully compatible with digital audio. In fact the amplitude and group delay linearity extended to the sub-sonic frequencies avoiding the low-frequencies overmodulation and phase distortion exalts the musical quality of digital audio. Even the musical quality of traditional analogic audio is emphasized.

• 0 ÷ 30/300/500 W maximum output power continuously adjustable by external control. Ideal as a stand-alone transmitter or a versatile exciter for power amplifiers.

• Frequency agile. Instant direct frequency programability from LCD Sub Menu with 10KHz steps. No tuning or adjustments required.

• Digital stereo coder. High performances digital STEREO CODER BUILT-IN (optional) with stereo separation (≥ 65dB) and signal/noise ratio (≥ 80 dB) for a top sound quality.

• Top quality sound. The generated signal is characterized by an excellent signal/noise ratio and by negligible residual AM and FM. All this guarantees the best quality of the broadcast signal.

•High frequency stability in short and long terms is assured by uProcessor Controlled Digital Phase Locked Loop circuit with low drift quartz reference.

• Deviation limiter. Internal dynamic function limits the maximum frequency deviation according with the international requirements (CCIR, FCC, etc…). This is to avoid adjacent channels invasion in case of accidental overmodulation without reducing the modulation quality.

• uProcessor Controlled protections with LCD front Panel Display in case of load mismatching (VSWR) or transmitting frequency error (PLL UNLOCK). Every alarm event is displayed by front panel LEDs and/or LCD display and can be resetted by automatic and /or manual control.

• LCD Menu Metering/Indicators: Working Frequency, Forward Power, Reflected Power, Frequency Deviation, Internal Power Supply Voltage and Current, Heat Sink Temperature, Input Audio L & R levels are displayed by front panel LCD Display.

• Adjustments and settings. Output power (PWR adj.), frequency deviation (DEV adj.) are front panel available or via Sub Menu on LCD front Panel Control for instant adjustment and setting.

• Output low pass filter. It assures a pure RF spectrum, according to the international requirements.

• Meets or exceeds international standards for safety and electrical specifications.

  • TECHNICAL SPECIFICATION OF PRODUCTS:

  • • Output power (depends on models) : 0 to /15/25/100 W adjustable
    • Output impedance : 50 Ω
    • Output connector : PL-259 female (others on request)
    • Frequency range : 87.5 ÷ 108 MHz
    • Frequency setting : Direct Change from LCD Menu or internal SW
    • Standard frequency stability : ± 1 kHz
    • Harmonic attenuation : < - 70 dBc
    • Spurious emissions : < - 80 dBc

  • Mono operation:

  • - Input level : -10÷+12 dBm adj.
    - Input connectors : XLR female/bal.
    - Input impedance : 600 Ω
    - Bandwidth : (± 0.25 dB) 20 Hz÷15 KHz
    - Deviation from pre-emph. curve : ± 0.5 dB
    - FM S/N ratio (±75 kHz dev. at 1 KHz) : ≥ 80 dB
    - THD + N : ≤ 0.1 %
    - 19 kHz attenuation : ≥ 50 dB
    - AM syncro residual : < -64 dBc
    - AM asyncro residual : < -68 dBc

  • Stereo operation (MPX input) :

  • - Input level : -10÷+12 dBm
    - Input connector : BNC, unbal.
    - Input impedance : 10 kΩ
    - Bandwidth (± 0.2 dB) : 20 Hz÷100 KHz
    - FM S/N ratio (±75 kHz dev. at 1 kHz) : ≥ 74 dB
    - Stereo separation (20 Hz÷15 kHz) : ≥ 60 dB
    - THD : ≤ 0.1%

  • Stereo operation (internal encoder) :

  • - Input connectors : (L&R) XLR,bal.
    - Input impedance : 600 Ω
    - Input levels : -10÷+12 dBm
    - 19 kHz attenuation : ≥ 55 dB
    - Pre-emphasis : 25/50/75 μs (front Panel Switch)
    - Bandwidth (± 0.25 dB) : 20 Hz÷15 KHz
    - S/N ratio (±75 kHz dev. at 1 kHz, 50uS) : ≥ 80 dB
    - Stereo separation (20 Hz÷15 kHz) : ≥ 65 dB
    - THD : ≤ 0.03%
    - AM syncro residual : < -64 dBc
    - AM asyncro residual : < -68 dBc

    Features and specifications subject to change without notice.








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