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Blonder Tongue MICM-45C-18 45 dBmV AV Modulator Channel 18
     

    Blonder Tongue MICM-45C-18 45 dBmV AV Modulator Channel 18

    Item #: MICM-45C-18   •   MFG #: MICM-45C-18

     

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    The MICM-45 is a professional quality, channelized, heterodyne audio/video modulator which provides modulated RF carrier output on any single VHF channel, including: broadcast TV (2-13), CATV (14-135). It is ideal for placing audio and video onto any unused VHF channel. Any standard audio/video source can be used, such as satellite receivers, television cameras, video tape recorders, or television demodulators. The MICM-45 utilizes SAW filtering with FCC group delay pre-distortion to provide true vestigial sideband selectivity which makes it perfect for use in adjacent channel systems. The MICM-45C takes baseband audio and video and modulates these signals onto the desired output channel. The MICM-45S takes baseband L/R audio and video and modulates these signals into the desired output channel. The heterodyne conversion process used in the unit employs a crystal referenced, PLL synthesized local oscillator. This guarantees rock solid, no-drift output for the life of the modulator. The MICM-45 meets FCC Docket 21006 aeronautical frequency offset requirements (±5 kHz video carrier accuracy). The modulator accepts standard polarity (sync negative) video in the range of 0.7 to 2.5 V pp. It has field defeatable audio pre-emphasis to provide stereo compatibility with any external BTSC stereo generator providing a composite stereo baseband output. The MICM-45S is a stereo A/V modulator providing a stereo audio and video modulated RF carrier on any single VHF channel. All other features and specifications are identical to the MICM-45C except as noted.

     
    • Features

      • 5-860 MHz Channelized Audio/Video Modulator
      • SAW Filtered to True Adjacent Channel Response
      • Die-Cast Chassis Offers Superior Protection Against Ingress or Egress
      • Front Panel Accessible Level Controls for Easy Set-Up and Adjustment
       
    • Specifications

      • RF:
      • Frequency Range54-860 MHz (Broadcast 2-13, Cable 14-135)
      • Output Lev el+45 dBmV
      • Output Level Range10 dB continuously adjustable
      • Aural/Visual Carrier Ratio-11 to -19 dB continuously adjustable
      • Visual Carrier Frequency Tolerance±10 kHz (standard channels), ± 5 kHz (aeronautical channels)
      • Aural Carrier4.5 MHz above visual
      • Frequency Setting±1.5 kHz
      • Spurious Outputs-60 dBc, min
      • C/N Ratio In Channel60 dB
      • Broadband Noise-90 dB
      • Output Return Loss12 dB
      • IF (Internal) Frequency45.750 MHz

      • VideoInput Level:
      • 1.0 V p-p for 87.5 % Modulation
      • Frequency Response fv -0.5 MHz to fv +4.2 MHz±1.0 dB
      • Video C/N60 dB (4 MHz BW)
      • P-P Video to RMS Hum Ratio60 dB
      • Differential Gain±4.0 % @ 87.5% Modulation
      • Differential Phase± 2° @ 87.5% Modulation
      • Input Return Loss18 dB

      • Genera:
      • External Power Requirements12 VDC @ 160 mA +5 VDC @ 130 mA (MICM-C) +5 VDC @180 mA (MICM-S)
      • Temperature Range0° to +50° C

      • Audio:
      • Input Level140 mV RMS for 25 kHz Peak Deviation
      • Input Impedance10K O, Unbalanced
      • Frequency Range20 Hz to 20 kHz (MICM-45C)
      • Frequency Response±1.0 dB, (50 Hz to 12 kHz) Reference to Std. 75 æs Pre-emphasis (MICM-45C) ± 0.3 dB (50 Hz to 50 kHz) (MICM-45S) in Stereo Configuration w/o pre-emphasis
      • Total Harmonic Distortion (%)1.0 at 25 kHz Deviation
      • Stereo Separation (MICM-45S)50 Hz - 100 Hz15 dB
      • 100 Hz - 1 kHz25 dB
      • 12 kHz18 dB
      • Aural Intercarrier±5 kHz (0° to +50° C), std.

      • Mechanical:
      • Dimensions (W x H x D)1.20 x 3.5 x 7.50 in., 29 x 89 x 191 mm
      • Weight0.65 lbs., 0.30 kg
      • Connectors/Impedance
      • Audio Input: RCA Female (MICM-45C)
      • L/R Audio Inputs: RCA Female
      • Video Input75 O "F" Female
      • RF Output75 O "F" Female
      • ControlsVideo LevelControl
      • Audio LevelControl
      • Aural Carrier Level Control
      • RF Output Leve Control
       
     
     

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