Blonder Tongue FA3M-50-860 Triple Channel Frequency-Agile Audio/Video to RF Modulator

Blonder Tongue FA3M-50-860 Triple Channel Frequency-Agile Audio/Video to RF Modulator

Blonder Tongue FA3M-50-860 Triple Channel Frequency-Agile Audio/Video to RF Modulator

B&H # BLFA3M50860 MFR # FA3M-50-860

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Blonder Tongue FA3M-50-860 overview

  • 1Description

The 1RU FA3M-50-860 Triple Channel Frequency-Agile Audio/Video to RF Modulator by Blonder Tongue features 3 analog audio and composite video modulator inputs. The 3 inputs can be modulated into any RF carrier channel in the 54 to 860MHz frequency range. The front panel control of each of the 3 modulators allows you to adjust the modulation level as well as to select the channel of your choice.

Rack mountable - 1 EIA (1.75") rack space
Supports all broadcast and CATV channels, including HRC and IRC assignments from 54 to 860MHz
Front panel accessible level controls for easy set-up and adjustments
Fully compatible with BTSC encoded stereo audio
In the Box
Blonder Tongue FA3M-50-860 Triple Channel Frequency-Agile Audio/Video to RF Modulator
  • Limited 1-Year Warranty
  • Table of Contents
    • 1Description

    Blonder Tongue FA3M-50-860 specs

    RF System
    Frequency Range 54 - 860 MHz
    Channels CATV, VHF, UHF (STD,HRC,IRC)
    FCC Offset 0, +12.5, or 25 kHz (pre-programmed)
    Output Level +50 dBmV (combined min)
    Output Level Adjust 15 dB (continuously adjustable, optimum performance at +40 to +50 dBmV)
    Aural/Visual Carrier Ratio -10 to -17 dB (continuously adjustable)
    Visual Carrier Frequency Tolerance Standard Channels: ±5 kHz
    FCC Aeronautical Channels: ±3 kHz max
    Aural Inter Carrier Frequency 4.5 MHz ±1 kHz (0 to 50°C)
    Channel Selectivity Adjacent Aural and Below: -40 dB
    Adjacent Picture and Above: -50 dB
    Spurious Outputs -60 dBc
    C/N Ratio In Channel 63 dB (4 MHz bandwidth, +50 dBmV output, 3 channels combined)
    Broadband Noise -70 dBc (4 MHz bandwidth, +50 dBmV output, 3 channels combined)
    Output Impedance 75 Ω
    Output Return Loss 12 dB
    Input Level 1.0 V peak to peak (87.5% depth of modulation)
    Frequency Response -0.5 to +4.2 MHz ±1.0 dB
    Hum Ratio 65 dB (peak to peak video to RMS)
    Signal-to-Noise Ratio 62 dB, NTC-7 weighted
    Differential Gain 2.0 % (87.5% depth of modulation)
    Differential Phase 1.0° (87.5% depth of modulation)
    C/L Delay Inequality Meets FCC CATV group delay pre-distortion requirements for color transmission
    Over Modulation Indicator 87.5, ±2.5 %
    Input Impedance 75 Ω
    Input Return Loss 24 dB, min
    Input Level 140 mV RMS (for 25 kHz peak deviation)
    Frequency Range 20 Hz - 20 kHz
    Pre-Emphasis-Mono 75 µs
    Frequency Response ±1.0 dB (referenced to standard 75 µs pre-emphasis)
    If Pre-Emphasis Defeated +0.5 dB
    Audio Signal-to-Noise 58 dB (for 25 kHz peak deviation)
    Total Harmonic Distortion 0.6% (30 Hz - 15 kHz, 25 kHz deviation)
    Over Modulation Indicator 25, ±2 kHz
    Input Impedance Greater than 10 KΩ, unbalanced
    Power Requirements 110 - 260 VAC
    Frequency 47 - 63 Hz
    Temperature Range 0 to +50°C
    AC Current (l) 0.32 A for 115 VAC
    Output Voltage +12 Vdc, + 5 Vdc
    Output Current 0.7 A max
    Audio Input RCA female
    Video Input "F" female
    RF Output "F" female
    Channel Selection Up/down push-buttons
    Video Level Control
    A/V Ratio Control
    Audio Level Control
    RF Output Level Control
    Channel Selection Push-button
    Display 2-digit LED, red
    Indicator LEDs +100 Indicator: LED red
    Video Over Modulation: LED, red
    Audio Over Modulation: LED, red
    Stereo Indicator: LED, green - not used
    Dimensions (W x H x D) 19 x 1.75 x 14.25" (22.86 x 4.45 x 36.20 cm)
    Weight 7 lb (317 g)
    Packaging Info
    Package Weight 8.95 lb
    Box Dimensions (LxWxH) 21.3 x 19.9 x 2.8"

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