The Fracarro MOD-TVCH4 is a multi-modulator designed for small domestic CCTV and television distribution installations. It automatically converts composite video from up to 4 cameras into RF television channels, then mixes those channels with the terrestrial TV and satellite signals already present in the building's coaxial network. The combined signal is amplified and distributed to all connected TV sets throughout the building.

Two operating configurations are supported: 4 cameras with terrestrial TV, or 3 cameras with terrestrial TV and satellite. The unit includes an output test mode and a generator for test line signals, making it straightforward to commission and verify the installation.

Key Features

• 4 composite video inputs (BNC, 0.5–2 Vpp)
• 1 mono audio input (BNC, 300 mVrms, 47 kΩ)
• 4 video inputs with 4 loop-out outputs
• RF output on channels S14, S16, S18, S20
• Adjustable RF output level: 70–90 dB
• Integrated mixer for terrestrial and satellite signal combining (0–230 MHz, 470–862 MHz)
• Test line generator: On/Off
• PAL AM negative double-sideband video modulation
• FM 50 ms pre-emphasis audio modulation

Product Benefits

• Combining camera video and broadcast TV onto a single coaxial network eliminates the need for a separate CCTV cabling run, reducing installation material costs
• The adjustable output level (70–90 dB) allows the installer to tune signal strength to match the size and cable length of the distribution network
• Loop-out video connections preserve the original composite signal for local monitoring or recording, in addition to the modulated RF output
• The built-in test line generator allows engineers to verify RF output level and mixer performance without external test equipment
• Low mixer insertion loss (<0.5 dB) ensures minimal degradation of the existing TV/SAT signal when adding camera channels

Technical Specifications

• Model: MOD-TVCH4
• Video signal input: Composite 0.5–2 Vpp, BNC
• Audio signal input: Mono 300 mVrms, 47 kΩ, BNC
• Video channels (input): 4
• Video channels (output): 4 loop out
• Audio channels (input): 1
• Audio channels (output): —
• Video modulation: PAL, AM negative double-sideband
• Audio modulation type: FM 50 ms pre-emphasis
• Audio deviation: 50.5 (50 mVrms, 1 kHz)
• S/N noise level: >50 dB
• Test line generator: On/Off
• RF output channels: S14, S16, S18, S20
• RF output level: 70–90 dB, adjustable
• Mixer frequencies: 0–230 MHz, 470–862 MHz
• Mixer loss: <0.5 dB
• Flatness: 1 dB
• Power supply: 220–240 V, 50/60 Hz
• Power consumption: 4 W
• Operating temperature: -10 +50 °C
• Dimensions (L × W × H): 235 × 125 × 65 mm
• Weight: 886 g

Why You'll Love It

• A single unit handles both CCTV modulation and TV/SAT signal mixing, so one box replaces what might otherwise require two or three separate components
• The four output RF channels (S14, S16, S18, S20) are in the S-band, a range that avoids most terrestrial broadcast channels and keeps camera feeds separated from broadcast content on the same cable
• At 4 W power consumption, the MOD-TVCH4 runs continuously without adding a significant load to the installation's power budget