Comnet FVR8018S1 8-Channel Digital Video Receiver with Bi-Directional Data

Overview

The Comnet FVR8018S1 is an 8-channel digital video receiver paired with 8 bi-directional data channels, designed to operate over a single strand of single-mode optical fiber. This is a receive-end module — it pairs with a compatible Comnet transmitter (such as the FVT8018S1) to deliver 10-bit digital color video and real-time serial data (RS232, RS422, RS485) across distances up to 48 kilometers without signal regeneration or line-of-sight constraints. The FVR8018S1 exceeds EIA RS-250C short-haul video transmission standards and is suitable for unconditioned outdoor installations — roadside equipment enclosures, remote camera arrays, traffic signal control systems, and other hardened CCTV deployments where traditional coax runs are impractical.

Key Features

• 8-Channel 10-Bit Digital Video: Each channel transmits real-time color video signals with 10-bit depth, delivering superior color fidelity and gradation compared to 8-bit systems. This reduces banding artifacts in surveillance footage, particularly in low-contrast scenes (fog, night video, or overexposed daylight).
• RS-250C Compliance: Video quality exceeds EIA RS-250C short-haul standards, ensuring predictable signal integrity and compatibility with legacy CCTV workflows that depend on this benchmark.
• Single-Mode Fiber Transport: 1310/1550 nm wavelength operation on single-mode fiber extends the reach to 48 km with a 16 dB power budget — roughly 15 times the distance of standard coaxial cable. Eliminates EMI pickup and ground loops that plague long copper runs.
• 8 Bi-Directional Data Channels: Full RS232, RS422, and RS485 (2-wire and 4-wire) support at data rates up to 250 kbps with bit error rate below 1 in 10^-9. Enables PTZ camera control, access control relay feedback, or sensor telemetry over the same fiber strand — no separate control wiring needed.
• Video Bandwidth 10 Hz to 6.5 MHz: 6.5 MHz bandwidth per channel supports composite video and standard CCTV signals; the 10 Hz lower limit rejects DC component drift. Differential gain <2%, differential phase <0.7°, and tilt <1% ensure minimal distortion. Signal-to-noise ratio of 67 dB provides clean imagery even in electrically noisy environments.
• Low Power Consumption and Rugged Design: Draws only 4W from 8–15 VDC input, with automatic resettable solid-state current protection on all power and signal lines. Operates from –40°C to +75°C; tested and certified to NEMA TS-1/TS-2 and Caltrans specifications for unconditioned roadside and out-of-plant installations. MTBF exceeds 100,000 hours.
• Flexible Mounting and Connectors: Housed in ComNet's ComFit enclosure, the FVR8018S1 supports wall, DIN-rail (with optional DINBKT1 adapter), or 3-slot hot-swappable rack installation. BNC video connectors (gold-plated center pins) and RJ45 data connectors (5 pieces included) ship standard.
• Bi-Color LED Status Indicators: Red/Green LEDs provide at-a-glance indication of video presence, data link status, and system health — useful for field diagnostics without requiring a terminal or workstation at the remote location.

Integration & Compatibility

The FVR8018S1 is the receive module in a point-to-point fiber-optic video and data link. It requires a matching transmitter (FVT8018 series) at the source end. The single-mode variant (S1 suffix) operates at 1310/1550 nm wavelengths; multimode versions (M1 suffix) are also available for shorter distances and different fiber types. Video input impedance of 75 ohms matches standard CCTV camera output and BNC cabling. Data channels operate in simplex or full-duplex modes, supporting both unidirectional telemetry and bidirectional serial protocols (such as PTZ pan-tilt-zoom command links or door access relay feedback). The modular design allows the FVR8018S1 to operate standalone (wall or DIN-rail mounted) or integrated into a rack with other ComNet modules.

Environmental and Durability Ratings

Operating temperature range –40°C to +75°C and storage range –40°C to +85°C cover desert heat and arctic cold without derating. Humidity tolerance extends to 95% non-condensing. Voltage transient protection on all power and signal lines safeguards against power surges, lightning-induced transients, and switching spikes common in roadside and industrial electrical environments. The unit is tested and certified for NEMA TS-1/TS-2 compliance and Caltrans traffic signal control equipment specifications, confirming suitability for US highway and municipal infrastructure deployments.

What's in the Box

• 1x Comnet FVR8018S1 receiver module (ComFit housing, 3 rack slots)
• 5x RJ45 data connectors (female, pre-installed on module rear)
• 1x Terminal block for 8–15 VDC power input
• 1x ST optical connector (rear panel, ready for single-mode fiber patch cord)

Frequently Asked Questions

Q: What transmitter module pairs with the FVR8018S1?

A: The FVT8018S1 video transmitter/data transceiver is the complementary unit for the FVR8018S1. Both operate on single-mode fiber at 1310/1550 nm wavelengths and support 8 video and 8 data channels over a single fiber strand.

Q: Can I mix single-mode and multimode fiber modules?

A: No. The FVR8018S1 (single-mode, S1 suffix) requires single-mode fiber and a matching single-mode transmitter. Multimode variants (M1 suffix) operate on 62.5/125 µm multimode fiber. They are not interchangeable — choose based on your fiber plant infrastructure.

Q: What is the maximum optical distance the FVR8018S1 supports?

A: 48 kilometers at 16 dB power budget for single-mode fiber operation. This assumes proper fiber quality and connectorization; real-world distance may vary based on attenuation, splice loss, and connector cleanliness.

Q: Does the FVR8018S1 require separate power supplies for each module?

A: Each FVR8018S1 draws 4W at 8–15 VDC. If rack-mounting multiple modules, a single 12 VDC supply can power several units (total current capacity permitting). Stand-alone wall or DIN-rail mounted units need a local 8–15 VDC power source (e.g., industrial DC supply or PoE injector with appropriate terminal-block adapter).

Q: Are the data channels truly bi-directional?

A: Yes. Each of the 8 data channels can operate in simplex (one-way) or full-duplex (simultaneous two-way) mode, supporting RS232, RS422, and RS485 (2-wire and 4-wire) protocols. Data rate is up to 250 kbps per channel with bit error rate <1 in 10^-9.

Q: Is there a warranty on the FVR8018S1?

A: Comnet provides a lifetime warranty on the FVR8018S1. MTBF rating exceeds 100,000 hours in typical operation.

Marty Allison

The FVR8018S1 is a workhorse for deployments where fiber-optic video transport is mandatory — highway traffic management systems, remote camera arrays in substations, or long-haul perimeter surveillance. The 48 km single-mode fiber reach means you can push video and control data from a centralized headend to remote unmanned sites without intermediate repeaters. That 10-bit digital video path and 16 dB power budget give you operating margin in harsh electrical environments where coax would pick up noise or require shielding nightmares.

Technical Highlights:

• 48 km single-mode fiber range at 16 dB power budget: Eliminates the 300-foot practical limit of RG-59/U coax. Delivers color video and serial data (PTZ commands, relay feedback, sensor telemetry) over a single fiber strand to remote locations — no intermediate electronics required within that budget.
• 10-bit digital video with RS-250C compliance: Video quality exceeds short-haul standards; 67 dB SNR and differential gain <2% mean clean footage in electrically noisy substations, highway corridors, or industrial zones. Bit error rate <1 in 10^-9 on all 8 data channels ensures PTZ commands and sensor links are rock-solid.
• 8 bi-directional RS232/422/485 data channels: Not just one-way feedback — full duplex support for PTZ cameras, access control relays, environmental sensors, or gate status. 250 kbps per channel handles motion-control protocols and real-time telemetry simultaneously with video.
• 4W power draw, 8–15 VDC input: Minimal current footprint. Rack-mount several modules on one 12V industrial supply. Automatic resettable solid-state current limiters protect against accidental short circuits — no field replacements needed after a wiring mishap.

Deployment Considerations:

• Fiber plant infrastructure is essential. The FVR8018S1 requires single-mode fiber backbone and a matching FVT8018S1 transmitter at the source. Verify your fiber is already in place or budget installation and splicing before ordering the module.
• ST connector rear panel means you need compatible patch cords and a clean termination process. Dirty connectors cost you dB quickly; confirm your field crews know single-mode connector discipline or hire a fiber contractor for the connection.
• MTBF >100,000 hours and lifetime warranty mean this module is built to outlast coax runs in the same environment. In traffic signal control or utility SCADA, the reliability curve favors fiber over copper — fewer field failures, lower total cost of ownership over 10+ years.

Use the FVR8018S1 where you need rock-solid video and control data over long range without repeater chains — traffic engineering, utility substation perimeter monitoring, and remote camera farms where fiber backbone already exists or will justify its cost through reduced maintenance and elimination of ground loops.