Comnet MINI FVT/R11M VIDEO MM 1 FIBER MINI FVT/R11M VIDEO MM 1 FIBER - COMPAK11M

Comnet COMPAK11M Fiber Video Transmitter/Receiver Mini Module

The Comnet COMPAK11M is a miniature fiber optic video transmission system designed for surveillance deployments where coaxial cable distance limits make fiber the only practical solution. This paired transmitter (FVT11M) and receiver (FVR11M) module set converts standard composite video into single-mode fiber signals, extending your analog camera feeds up to 4 kilometers (2.5 miles) over a single 62.5/125µm multimode fiber strand—eliminating the distance and noise constraints of conventional RG59 coaxial runs.

Key Features

• Single-fiber architecture (850nm multimode): One fiber carries both the transmit and receive video signals simultaneously, cutting installation labor and reducing conduit congestion compared to bidirectional dual-fiber systems. The 850nm wavelength is the industry standard for multimode fiber, meaning off-the-shelf patch cables and couplers are inexpensive and widely stocked.
• 4 km maximum distance: Reaches 4 kilometers (2.5 miles) in length—roughly 13 times farther than the 300 ft. coaxial limit—allowing you to consolidate camera circuits across large campuses, industrial sites, or remote facility perimeters without intermediate amplification.
• 60 dB signal-to-noise ratio: Clean, low-noise video output means your VMS or analog monitoring system receives stable, artifact-free composite signal. This is critical for forensic-grade footage in retail or banking environments where image clarity is an auditable requirement.
• 5 Hz to 10 MHz bandwidth: Full NTSC/PAL composite video bandwidth ensures all video content—including chroma subcarrier—passes through without roll-off or color distortion. Unlike bandwidth-limited systems, you maintain frame-rate and color fidelity at maximum distance.
• Compact transmitter and receiver modules: The FVT11M transmitter measures 2.3 x 1.6 x 1.1 inches; the FVR11M receiver is 4.0 x 3.7 x 1.0 inches. Both use terminal-block power connectors, so you can mount them directly at camera heads or inside outdoor cabinets without dedicated PCB real estate.
• Wide operating temperature (-40 to +75°C): Handles harsh outdoor installations—arctic mounting sites, sun-exposed roof cabinets, and deep-winter facility perimeters—without thermal derating or seasonal repositioning.
• Low power draw (80 mA transmit, 60 mA receive): At 12 VDC, each module draws less than 1 watt. Run both on a single 24V power supply loop; no separate PSU infrastructure required.
• Optical ST connectors and BNC video I/O: Standard industry connectors mean integration with existing fiber infrastructure and camera harnesses requires no adapters or custom pigtails.
• MTBF >100,000 hours: Rated for over 11 years of continuous operation, reducing unplanned maintenance cycles and field service calls in unmanned remote sites.

Optical Specification and Deployment Benefits

The 14 dB power budget and 62.5/125µm multimode fiber support accommodate both new installations and retrofits into existing multi-mode campus backbones. Differential gain and phase distortion (<5% each, <1% tilt) keep sync stability within broadcast-grade tolerances—important if your VMS or recorder relies on analog timing cues. The COMPAK11M's output features AGC (automatic gain control), which automatically compensates for minor fiber-path loss and power-supply variations, so you don't need field trim pots or technician visits to dial in optimal receive levels.

Integration and Compatibility

Install the FVT11M at your camera or analog DVR output; run a single multimode fiber to the FVR11M at the receiving hub. Both units accept 8–15 VDC input, so they integrate into standard 12V or 24V surveillance power rails. The BNC connectors accept any standard composite video source (NTSC/PAL camera, analog switcher, or test equipment) on the transmit side and feed standard composite video to any analog-era DVR, frame grabber, or VMS with composite input on the receive side. This is a passive fiber extender—no IP conversion, no RTSP, no VMS-specific drivers. If your ecosystem still runs analog chains, the COMPAK11M bridges the distance gap without replacing working hardware.

What's in the Box

Package includes the FVT11M transmitter module, FVR11M receiver module, terminal-block connectors for power, and documentation. Multimode fiber patch cable and fiber jumpers are ordered separately based on your run length and routing.

Frequently Asked Questions

Q: Can I use single-mode fiber instead of multimode with the COMPAK11M?

A: No. The COMPAK11M is designed for 62.5/125µm multimode fiber only. The 850nm LED source and receiver optics are optimized for multimode modal bandwidth; single-mode fiber will not work and may damage the transceiver.

Q: What's the maximum coaxial cable distance before fiber is necessary?

A: The COMPAK11M supports up to 300 feet of RG59 coaxial cable as a baseline; beyond that, signal degradation (loss of chroma, sync jitter, or noise floor creep) becomes visible. At 4 km over fiber, you bypass coax entirely, so distance becomes a non-constraint.

Q: Do I need a separate power supply for the transmitter and receiver?

A: No. Each module draws under 80 mA at 12 VDC, so both can share a single 24V power circuit or plug into separate 12V rails. Terminal-block connectors allow daisy-chaining or individual connections.

Q: Will the COMPAK11M work with IP cameras or modern VMS systems?

A: The COMPAK11M is a fiber extender for analog composite video only. If your cameras output HDMI, SDI, or IP streams, you'll need a different fiber converter. This module is for legacy analog surveillance infrastructure or hybrid sites still running composite camera chains.

Q: What happens to image quality over 4 km?

A: The 60 dB SNR and AGC output stage maintain image stability and color fidelity across the full 4 km range. You won't see visible degradation like snow, ghosting, or color shift. Quality is equivalent to a short 50-foot coaxial run.

Q: Is there a warranty on the COMPAK11M?

A: Refer to the manufacturer's warranty documentation. The MTBF rating of >100,000 hours reflects expected reliability in standard operating conditions.

Karl Wilson

The COMPAK11M is a no-nonsense fiber video bridge for the remaining analog surveillance installations on campus networks. I specify this pair when coaxial runs hit the 300-foot wall—typically cross-building routes, perimeter fencing loops, or warehouse floor-to-control-room bundles—and IP conversion isn't an option or budget priority. The 60 dB SNR and AGC-stabilized output keep composite video rock-solid over 4 kilometers, meaning your legacy DVR or analog switching matrix sees the same signal quality as if the camera were 50 feet away.

Technical Highlights:

• 850nm multimode (62.5/125µm): Off-the-shelf fiber couplers, patch cables, and wall boxes cost half of single-mode equivalents and are stocked by every networking supplier. The 14 dB power budget is comfortable headroom for 4 km runs with minor splice losses, and you avoid the cost and fragility of single-mode terminations on a retrofit.
• 5 Hz–10 MHz bandwidth with <5% differential gain/phase: Full NTSC/PAL color carrier passes without roll-off or chroma subcarrier distortion. If your DVR or monitor has sync-detect logic, this module won't introduce jitter or color shift that confuses edge triggers in motion-detection systems.
• 80 mA transmit, 60 mA receive at 12 VDC: Two modules pull under 1.6 watts total. Plug both into a single 24V surveillance loop alongside your cameras and NVR. No dedicated PSU, no cross-circuit isolation concerns.

Deployment Considerations:

• This is analog-only—no IP encapsulation, no RTSP, no VMS driver support. If you're migrating to IP cameras, this module buys you time without forcing a wholesale system swap, but it's a bridge, not a long-term platform.
• Fiber routing and termination matter. A pinched or tightly bent multimode run (radius <1 inch) will degrade power budget. Have your fiber contractor verify bend radius and inspect splice loss during FAT; don't assume 4 km range if installation shortcuts the conduit design.

The COMPAK11M shines in industrial and retail campuses where you've already amortized an analog infrastructure and a single long camera feed—parking lot, fence line, or warehouse tier—is the bottleneck. Install it, verify SNR with an oscilloscope, and don't revisit it for 11 years.