Comnet 10-bit Digitally Encoded Short-Haul Video + Bi-Directional Data + - FVT10D1A2C1S1

Comnet FVT10D1A2C1S1 10-Bit Digital Video Transmitter with Data and Audio

Overview

The Comnet FVT10D1A2C1S1 is a 10-bit digitally encoded video transmitter designed to move one video channel, one bidirectional data channel, two audio channels, and one contact closure signal across a single optical fiber — the core topology for long-distance surveillance and traffic control systems deployed in unconditioned roadside or out-of-plant environments. EIA RS-250C short-haul compliant, the FVT10D1A2C1S1 transmits real-time color video with zero performance variation across optical path loss and extremely low video distortion, making it the right choice when video quality cannot degrade regardless of fiber length or environmental stress.

Key Features

• 10-bit digital video encoding: Encodes analog NTSC, PAL, or SECAM video into 10-bit digital format for transmission over single-mode or multimode fiber — ensures pixel-perfect fidelity and eliminates the analog noise and bandwidth loss of older coax-based transmitters. One real-time color video signal per unit.
• Bidirectional RS232, RS422, and RS485 data support: Supports RS232, RS422, and 2- or 4-wire RS485 with tri-state interfaces — allows transparent serial data flow in either direction without dedicated return path hardware. Critical for PTZ camera control, alarm relay feedback, and meter telemetry over the same fiber as video.
• Two bidirectional audio channels with 24-bit 96kHz encoding: Transmits and receives balanced line-level audio up to +6dBm on two independent channels — phone lines, two-way intercom, or alert speakers all coexist on a single fiber. Audio bandwidth spans 20 Hz to 18 kHz, covering intelligible speech and warning tones.
• Bidirectional contact closure channel: One contact closure input and output allows relay switching, gate activation, or alarm signaling to propagate across the fiber without additional wiring — essential for roadside cabinet interlocks or traffic signal synchronization.
• NEMA TS-1/TS-2 environmental hardening: Rated for unconditioned out-of-plant mounting in extreme ambient temperature swing, mechanical shock, vibration, humidity with condensation, high/low voltage transients, and surge protection on all power and signal I/O lines — no climate-controlled enclosure required. Meets Caltrans traffic control specifications.
• Hot-swappable rack modules with stand-alone versatility: Interchangeable between stand-alone or rack mount configurations using ComFit design — deploy in a roadside shelter or integrate into a central equipment rack without redesign. Bi-color LED status indicators (red/green) provide real-time indication of critical operating parameters.

Integration and Compatibility

The FVT10D1A2C1S1 is universally compatible with any NTSC, PAL, or SECAM CCTV camera system — no format detection or conversion needed. Plug-and-play design requires no software configuration; video, data, and audio begin transmitting immediately upon power-up. The unit pairs with Comnet FVR10D1A2C1 video receiver/data transceiver modules (sold separately) to complete the fiber link. Data transparency means it works with legacy surveillance DVRs, traffic control systems, and any RS-232/422/485 serial device without adapter logic.

Optical and Environmental Performance

Zero performance variation versus optical path loss means the FVT10D1A2C1S1 delivers identical video quality whether the fiber run is 100 meters or 20 kilometers — a critical distinction from older analog video extenders that degrade gradually with distance. Voltage transient protection on all power and signal input/output lines guards against power surges and lightning-induced voltage events common in roadside and outdoor telecom installations. Lifetime warranty covers the transmitter against defects in materials and workmanship.

Frequently Asked Questions

Q: Does the FVT10D1A2C1S1 require a matching receiver?

A: Yes. The FVT10D1A2C1S1 transmits video, data, and audio over one fiber. You will need a Comnet FVR10D1A2C1 receiver/data transceiver on the far end to recover the signals. The two modules form a complete fiber link.

Q: Can I run analog video and data simultaneously?

A: Yes. The FVT10D1A2C1S1 accepts one analog video input (from any NTSC, PAL, or SECAM camera) and simultaneously transmits one bidirectional RS232/RS422/RS485 data channel on the same fiber, plus two audio channels and one contact closure. All signals are multiplexed digitally.

Q: What happens if I mix single-mode and multimode fiber?

A: The FVT10D1A2C1S1 works with both single-mode and multimode fiber, but both ends of the link must use the same fiber type. Mixing types will cause signal loss or complete failure.

Q: Is the FVT10D1A2C1S1 suitable for unconditioned outdoor cabinets?

A: Yes. NEMA TS-1/TS-2 hardening means it is designed for unconditioned out-of-plant environments with extreme temperature swing, humidity, vibration, and transient voltage protection. Caltrans traffic signal specification compliance confirms suitability for roadside deployment.

Q: Does the transmitter require external power conditioning or UPS?

A: No. Built-in voltage transient protection on all power lines provides protection from power surges and transient voltage events. Standard 24VAC or 12VDC input (verify with your site spec); external conditioning not required for standard installations.

Q: What is the warranty on the FVT10D1A2C1S1?

A: Lifetime warranty covers defects in materials and workmanship for the life of the product.

Eden Phillips

The Comnet FVT10D1A2C1S1 is the backbone module for fiber-extended surveillance and traffic control networks where analog video, serial telemetry, two-way voice, and relay signals all need to travel together without performance degradation across long distances. The 10-bit digital encoding is the critical differentiator here — it gives you zero performance variation versus optical path loss, meaning your video quality at 20 km is identical to your video quality at 100 meters. That's not true of older analog extenders, which degrade predictably with distance.

Technical Highlights:

• 10-bit digital video encoding: Pixel-perfect NTSC/PAL/SECAM video over fiber with no analog noise, no bandwidth loss, and no distance-dependent quality degradation. EIA RS-250C short-haul compliant means it meets the video fidelity standard that traffic authorities and utility companies rely on.
• Multiplexed data, audio, and contact closure on one fiber: Bidirectional RS232/RS422/RS485 data, 24-bit 96 kHz stereo audio (20 Hz–18 kHz bandwidth), and one contact closure all coexist on a single fiber run. That eliminates the need for multiple fiber pairs or return-path coax, which is why this module is so heavily deployed in remote cabinet and roadside applications.
• NEMA TS-1/TS-2 hardening with surge protection on all I/O: Unconditioned out-of-plant rated means it survives extreme temperature swing, humidity with condensation, mechanical shock, vibration, and transient voltage spikes without external power conditioning or climate control. Caltrans traffic signal specification compliance is your confirmation it's built for real-world roadside stress.

Deployment Considerations:

• The FVT10D1A2C1S1 is transmit-only — you must pair it with a Comnet FVR10D1A2C1 receiver on the far end of the fiber to recover video, data, and audio. Plan for a complete fiber link at both ends of your run.
• Fiber type (single-mode vs. multimode) must match on both ends. Mixing types will degrade signal or fail. Confirm your fiber plant before installation, and label the fiber clearly at both patch panels.
• The bi-color LED status indicators (red/green) are your only real-time feedback on the unit itself. In a remote cabinet, you may not see them. Plan for out-of-band monitoring — a simple contact-closure-to-relay or network-based alarm from your central site will give you confidence that the transmitter is healthy.

The FVT10D1A2C1S1 is the right choice for any fixed-distance, long-haul traffic control or remote surveillance network where you need analog video quality, serial device control, and voice or alarm signaling on a single fiber without repeaters or protocol conversion. Roadside camera farms, utility distribution cabinets, and toll-plaza deployments all run on this topology.