Comnet 4-Channel Digitally Encoded Video Receiver - FVR40SFP

Comnet FVR40SFP 4-Channel Digitally Encoded Video Receiver

Overview

The Comnet FVR40SFP is a 4-channel digitally encoded video receiver built to extend analog video signals over coaxial cable with minimal signal degradation. This is the receive end of Comnet's digital video transport system — it decodes 10-bit digitally encoded video and reconstructs it at the recorder or display input. The FVR40SFP handles real cable runs of up to 100 meters (300 feet) on standard RG-59 coax without the noise floor climb you'd see with raw analog transmission over the same distance. Purpose-built for retrofit installations, analog-to-IP migrations, and environments where rewiring to IP cameras isn't practical or cost-effective.

Key Features

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• 4-Channel Digital Video Reception: Each channel decodes 10-bit digitally encoded video independently, so all four feeds arrive at your recorder simultaneously without multiplexing delays or bandwidth sharing. Real benefit: four discrete video streams at full quality without arbitration overhead.
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• 100-Meter Coax Distance (RG-59): Standard coaxial cable carries video 300 feet without active repeaters or line drivers — a hard advantage over raw composite video, which drops signal-to-noise at 50+ meters. Extends the useful life of existing copper runs in warehouses, yards, and industrial facilities.
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• 67 dB Signal-to-Noise Ratio: High SNR means your video arrives clean: fewer artifacts, less grain, more legible detail in surveillance footage. At this noise floor, you preserve usable edge definition even after the full 100m cable run, critical for facial recognition or license-plate work.
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• Differential Gain <2% and Differential Phase <0.7°: These specs measure color and brightness accuracy — the FVR40SFP keeps color shift and amplitude wander minimal across the 5 Hz to 6.5 MHz video bandwidth. Matters if you're color-matching video from multiple cameras or doing any downstream chroma processing.
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• Tilt <1%: Low baseline shift means the black and white levels stay stable across the video frame and from frame to frame. Prevents the creeping brightness drift that degrades evidence-grade footage over time or long cable runs.
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• 1U Rack-Mount Form Factor: Single-slot 1RU footprint (6.1 x 5.3 x 2.2 inches) fits standard 19-inch racks. Weighs under 2 pounds, so it mounts in cramped head-end spaces without structural concerns or dedicated cooling.
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• Wide Operating Temperature Range (-40°C to +75°C): Rated for outdoor head-end enclosures, unheated server closets, and hot summer attics. Storage range extends to +85°C, so transit in sealed containers won't damage the unit. Real deployment win for distributed camera systems in extreme climates.
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• Low Power Draw (3W): Minimal current consumption means you can power the FVR40SFP from a small 8–15 VDC supply — no 120V AC run or dedicated outlet needed in remote locations. Pairs cleanly with solar + battery systems in off-grid surveillance builds.
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• MTBF >100,000 Hours: Manufacturer's mean time between failure specification shows design margin. At 24/7 operation, you're looking at 11+ years nominal life — realistic for a head-end appliance that you install once and forget.
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• NEMA TS-2 Compliance: Meets Transportation Systems Standards for signal quality, giving confidence in broadcast-grade analog video transport. Relevant if your installation feeds into transit authority, utility, or critical infrastructure networks.
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Integration & Compatibility

The FVR40SFP connects to any analog video input rated for 1 volt pk-pk at 75 ohms — standard for DVRs, analog multiplexers, and legacy video processors. Input terminals include ST and BNC connectors on a terminal block, so you can crimp permanent leads or use standard coax connectors without adapters. The receiver outputs true decoded composite video, fully compatible with any recorder, frame grabber, or switching matrix that accepts 75-ohm video. If you're migrating an analog system to IP, the FVR40SFP FVR40SFP bridges the gap: keep your coax plant, upgrade the recorder to ONVIF-compatible NVR, and feed this receiver's outputs into an analog input card or encoder. No firmware updates, no configuration menus — it decodes video the moment power arrives.

Environmental and Reliability

Relative humidity range (0% to 95% non-condensing) covers indoor and outdoor enclosures as long as you avoid direct condensation. The wide temperature operating window (-40°C to +75°C) handles desert heat and mountain cold without performance shift. Combined with the >100,000 MTBF rating and solid-state design (no fans, no moving parts), the FVR40SFP is a set-and-forget appliance in fixed installations where service access is limited.

Frequently Asked Questions

Q: Can the FVR40SFP extend analog video distances beyond 100 meters?

A: No. The 100-meter limit on RG-59 is the design specification. For longer runs, deploy intermediate Comnet transmitter/receiver pairs or convert to IP before transmission.

Q: What happens if I feed the FVR40SFP raw (non-encoded) analog video from a camera?

A: It won't decode properly. The FVR40SFP expects 10-bit digitally encoded video from a matching Comnet transmitter. Feeding it raw composite video will produce garbled or no output.

Q: Does the FVR40SFP require any configuration or setup?

A: No. Provide 8–15 VDC power and connect the encoded video inputs and decoded video outputs. It operates out-of-the-box with no menus, firmware, or calibration.

Q: Is the FVR40SFP NDAA Section 889 compliant?

A: This product does not appear on the NDAA Covered List. Verify with your procurement team if Section 889 compliance is a requirement.

Q: Can I use the FVR40SFP with coax cable other than RG-59?\p>\n

A: The 100-meter distance specification applies to RG-59. RG-6 offers lower loss and may extend range; RG-58 or RG-62 will reduce range. Use 75-ohm coax only to maintain impedance matching and signal integrity.

Q: What is the warranty on the FVR40SFP?\p>\n

A: Refer to the manufacturer's warranty documentation or contact the distributor for specific terms and coverage.

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Ted Perry

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I've deployed the Comnet FVR40SFP FVR40SFP in several long-coax retrofit jobs where upgrading to IP cameras wasn't in scope. The 67 dB signal-to-noise ratio on a 100-meter run is the real story here — you get clean, stable video without the noise floor creep that kills analog-only systems beyond 50 meters. If you're extending existing analog infrastructure and need forensic-grade evidence capture, this receiver pays for itself in install time saved.

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Technical Highlights:

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• 10-Bit Digital Encoding with 67 dB SNR: The FVR40SFP decodes at a noise floor that preserves facial and plate detail across the full 100-meter coax span. Compare this to raw composite video at 50+ meters — the difference is visible and measurable. You keep usable edge definition in low-light scenes and crowd footage.
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• Differential Gain <2%, Differential Phase <0.7°, Tilt <1%: These specs mean color and brightness are locked down across the entire signal path. Your reds stay red, blacks stay black, and histogram curves don't drift. Critical if downstream analytics or manual review depends on color consistency across a multi-camera array.
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• 3W Power Draw, 8–15 VDC Input: The receiver sips current — low enough to run from a small battery/solar backup or a shared 24V PoE midspan in remote head-end enclosures. No 120V AC run or dedicated outlet needed, which saves real dollars in distributed camera plants.
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Deployment Considerations:

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• The FVR40SFP decodes 10-bit encoded video only — it cannot work with raw analog camera feeds. Pair it with a matching Comnet FVT40 or equivalent encoder at the camera end, or verify your existing encoder outputs are Comnet-compatible before ordering.
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• The 100-meter distance spec applies to RG-59 coax with proper 75-ohm impedance matching. Field testing showed real-world distance starts degrading beyond 100 meters; don't rely on longer cable runs without intermediate repeaters, or plan for signal boosting.
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Best fit: surveillance retrofits in older buildings where you have existing coax backbone, or industrial sites where you're integrating analog PTZ heads or legacy multiplexers into a new NVR-based platform. The FVR40SFP bridges analog and modern recording cleanly, with no firmware to manage and minimal power overhead.

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