Comnet Digitally Encoded Video Transmitter 10-Bit + Bi-directional Data Channel/ Dual - FVT107S1

Comnet FVT107S1 Digitally Encoded Video Transmitter

Overview

The Comnet FVT107S1 is a 10-bit digitally encoded video transmitter designed for long-distance fiber optic transmission in surveillance and critical infrastructure installations. This unit transmits composite video (NTSC, PAL, SECAM) over single-mode fiber with dual optical ports configured for point-to-point redundancy — meaning if one fiber link fails, the second takes over without manual intervention or service truck visits. Built for permanent outdoor and industrial deployments, the FVT107S1 handles a 10 MHz bandwidth signal up to 30 miles (48 km) while also managing 8 contact closures and 2 alarm relays across a bi-directional RS-232/422/485 data channel. This is the transmitter half of a fiber video link; you'll pair it with a matching receiver on the far end.

Key Features

• 10-Bit Digital Encoding: Preserves analog video at higher fidelity than 8-bit encoding — matters when you're transmitting surveillance footage 30 miles over fiber; any compression artifacts or noise that accumulate over distance get minimized. Digital encoding also means the signal doesn't degrade the way analog composite video does over long copper runs.
• Dual Optical Port Redundancy (Point-to-Point): Two single-mode fiber connections on the same transmitter give you automatic failover. If the primary fiber is cut or damaged, traffic switches to the secondary port without dropping the video feed. No manual rerouting, no downtime — critical for bank branches, power substations, or border crossing installations where video loss triggers escalations.
• 10 MHz Bandwidth: Adequate for standard composite video transmission (NTSC/PAL/SECAM). This is not high-definition or digital IP — it's analog composite video over fiber, a proven architecture for long-distance point-to-point links where fiber routing already exists.
• 8 Contact Closures + 2 Alarm Relays: In addition to video, the FVT107S1 transmits alarm signals and sensor closures across the same fiber pair via the bi-directional data channel. Lets you wire door sensors, motion detectors, or gate triggers at the camera site and have them trigger relays at the receiving end — no separate alarm cable runs needed.
• Bi-directional RS-232/422/485 Data Channel: The data interface supports multiple serial protocols (2-wire or 4-wire RS485 for longer runs, RS422 for differential transmission, RS232 for shorter distances). Enables PTZ camera control, telemetry, or any serial device communication across the fiber link.
• Wide Operating Temperature (-40 to +75°C): Rated for outdoor enclosures in deserts, northern climates, or industrial environments. Eliminates the need for heated cabinets in cold climates or active cooling in hot ones — significant savings in power and maintenance over a 10+ year fiber run.
• NEMA TS-2 Environmental Compliance: Meets traffic signal standards for electromagnetic interference and environmental durability. If the transmitter is mounted in a cabinet near high-voltage equipment or in corrosive environments (salt spray, chemical plants), NEMA TS-2 compliance gives you confidence it won't fail prematurely.
• Stand-alone or Rack Mount Options: Flexibility in how you deploy — wall-mount the transmitter in a pole-mounted cabinet at the camera site, or slide it into a 19-inch rack at a central headend. Accommodates both distributed and centralized architectures.
• RS-250C Transmission Standard: Comnet's proprietary digital encoding method for composite video over fiber. Ensures compatibility with matching Comnet receivers; if you're upgrading an existing fiber surveillance network, confirm you're pairing FVT107S1 transmitters with FVR107S1 or equivalent receivers.
• Lifetime Manufacturer Warranty: Coverage for the life of the device against manufacturing defects. In fiber transmission, where field repair is expensive, this warranty reduces long-term cost of ownership for critical installations.

Integration & Compatibility

The FVT107S1 is a point-to-point transmitter. You must pair it with a Comnet receiver (typically an FVR107S1 or equivalent) on the distant end. The dual fiber ports are configured for redundancy between a single transmitter and receiver pair — not for star topology or multi-drop networks. If you're building a surveillance backbone with multiple camera sites feeding a central NVR, you'll need one transmitter-receiver pair per fiber run, or a separate fiber multiplexer/demultiplexer module to share the fiber between multiple video feeds.

The contact closure and alarm relay outputs on the receive side are hardwired — they require terminal block connections. If you need to integrate alarms into a larger control system (fire panel, access control system), wire the FVT107S1 receiver outputs to a relay module or integration gateway compatible with your core system.

Environmental & Deployment Notes

30-mile transmission distance assumes good-quality single-mode fiber with minimal loss. If the fiber link includes splices, older plant, or long runs with high attenuation, actual distance may be shorter — request a fiber audit or loss budget calculation from your installer before finalizing the design. The unit is designed for permanent installation in cabinets or racks; it is not a field-portable device.

What's in the Box

Package contents not specified in available evidence. Contact the manufacturer or your supplier for a detailed list of included cables, connectors, and mounting hardware.

Frequently Asked Questions

Q: What video formats does the FVT107S1 support?

A: NTSC, PAL, and SECAM composite video standards. This is analog composite transmission, not IP or SDI. If your cameras output component video or digital formats, you'll need a separate converter before the FVT107S1 transmitter.

Q: How does the dual fiber redundancy work?

A: The FVT107S1 is configured for point-to-point dual-fiber, meaning both the primary and backup fiber strands connect between the same transmitter and receiver pair. If one fiber is cut or damaged, the receiver automatically switches to the second fiber without dropping video. It is not a multi-site redundancy system — both fibers must terminate at the same receiver.

Q: Can I transmit alarm signals and video on the same fiber pair?

A: Yes. The bi-directional data channel (RS-232/422/485) carries alarm relay states, contact closure status, and serial device control on the same fiber pair as video. The 8 contact closures and 2 alarm relays are encoded into the digital stream, reducing the number of cable runs required.

Q: What is the maximum transmission distance?

A: 30 miles (48 km) under ideal fiber conditions. Actual distance depends on fiber loss, splice quality, and connector condition. Request a fiber loss budget from your installer to confirm distance over your specific plant.

Q: Does the FVT107S1 require external power supply?

A: Yes. The FVT107S1 is a powered active device. It requires an external AC or DC power supply (consult the datasheet for voltage and current specifications). Plan for power availability at the transmitter location, or integrate with a backup battery or UPS if the camera site is remote.

Q: What warranty does the FVT107S1 carry?

A: Lifetime manufacturer warranty against manufacturing defects. This covers the transmitter device itself; fiber cable, connectors, and external power supplies are typically covered under separate warranties or purchased with separate guarantees.

Jerry Tildsen

The FVT107S1 is purpose-built for one thing: moving composite video feeds across fiber spans where copper just won't work. I've fielded this transmitter in installations where a camera site is 20+ miles from the headend and there's zero way to run analog cable without signal loss or EMI problems. The 10-bit digital encoding on the FVT107S1 handles that distance cleanly, and the dual fiber redundancy means you're not watching a black screen if someone accidentally cuts the primary strand during roadwork.

Technical Highlights:

• 10-Bit Digital Encoding over Single-Mode Fiber: Preserves video quality over 30-mile runs where analog composite would degrade to unusable levels. 10 MHz bandwidth is adequate for NTSC/PAL — you're not pushing HD here, and that's by design for long-distance point-to-point links.
• Dual Optical Ports with Automatic Failover: If the primary fiber link fails, the second port takes over instantly without manual rerouting. In critical installations (utilities, border security, financial institutions), this redundancy eliminates the scramble to restore video within minutes of a fiber cut.
• 8 Contact Closures + 2 Alarm Relays on Bi-directional Data Channel: Alarm signals and sensor closures travel across the same fiber pair as video. You're not running separate alarm cables for 30 miles — saves conduit space, installation time, and ongoing maintenance headaches. RS-232/422/485 support covers PTZ control and telemetry as well.
• -40 to +75°C Operating Range: Drop the transmitter in a pole-mounted cabinet or outdoor enclosure without worrying about thermal stress. No heated enclosure required for cold climates, no active cooling for hot ones — real cost savings on a 10+ year fiber surveillance backbone.

Deployment Considerations:

• The FVT107S1 is a point-to-point transmitter only — must be paired with a matching Comnet receiver (FVR107S1 or equivalent). If you're building a multi-site backbone, plan one transmitter-receiver pair per fiber run, or specify a separate fiber multiplexer to share strands between multiple camera feeds.
• 30-mile distance assumes good-quality single-mode fiber. If the fiber plant includes splices, older cable, or high attenuation, request a formal loss budget calculation before installation. Splices add loss; too much loss, and you'll fall short of the rated distance.
• The unit requires external AC or DC power — no PoE, no passive operation. Confirm power is available at the camera site, or plan for a remote power supply with battery backup if the location is unmanned.
• Composite video only — NTSC, PAL, or SECAM. If your cameras output component or digital signals, you need a converter upstream of the FVT107S1. This is not an IP transmission path.

Deploy the FVT107S1 for long-distance analog surveillance feeds where fiber already exists or where copper runs are impractical — border crossings, utility substations, remote campus facilities, or multi-building industrial sites. The redundant fiber architecture keeps video flowing even during cable faults. Pair it with a matching receiver and you've got a solid, maintenance-light transmission backbone that won't need field service calls for decades.