Comnet 4-Channel Digitally Encoded Video Receiver + 4 Audio Channels mm 1 fiber - FVR40A4M

Comnet FVR40A4M 4-Channel Digitally Encoded Video & Audio Fiber Receiver

Overview

The Comnet FVR40A4M is a 4-channel digitally encoded video receiver paired with 4 channels of digitally encoded audio, designed to extend analog CCTV surveillance over a single strand of optical fiber up to 48 km (30 miles). Unlike analog fiber transmission, which degrades with distance and requires optical attenuators and manual tweaking, the FVR40A4M uses 10-bit digital encoding to deliver broadcast-quality EIA/TIA RS-250C Short-Haul video with zero performance loss up to maximum transmission distance. This matters in sprawling industrial sites, highway corridors, campus installations, and remote monitoring applications where running copper back to a central headend is impractical or cost-prohibitive. The unit works transparently with NTSC, PAL, and SECAM camera systems—no firmware changes, no compatibility matrix hunting.

Key Features

• 10-Bit Digitally Encoded Video Channels (4): EIA/TIA RS-250C Short-Haul quality on all four channels with zero degradation over the full 48 km optical span. Analog fiber systems drop performance noticeably beyond 15–20 km; digital encoding holds fidelity end-to-end, meaning you can position cameras at real distance and still get clean, evidence-grade video at the receiver.
• 24-Bit/96 kHz Audio Encoding (4 Channels): Studio-grade audio sampling rate paired with 20 Hz to 18 kHz frequency response ensures voice and ambient sound are captured without the muddy, low-fidelity tone of standard CCTV audio. Line-level 600 ohm balanced audio I/O at +6 dBm maximum output integrates directly with professional mixing consoles or VMS audio inputs.
• Single Fiber Multiplexing: All four video and four audio channels ride on one multimode or single-mode optical fiber strand, reducing fiber count and installation cost. If you're running fiber to a remote gate house or junction box, one fiber does the job of eight separate analog coaxial runs.
• 48 km (30 Miles) Optical Range: No optical attenuators required. The wide optical dynamic range means the receiver automatically handles varying fiber loss across temperature swings and aging—set it once, walk away. This is critical in outdoor/unconditioned installations where temperature swings and UV-aged splices degrade signal over time.
• Universal CCTV Compatibility: Works with any NTSC, PAL, or SECAM camera without modification. No encoder boxes, no IP conversion, no VMS licensing per camera—plug the analog camera into the transmitter side, plug the receiver output into your DVR or quad-split monitor, and it works. Especially valuable in retrofit scenarios where replacing analog cameras is off the table.
• Harsh Environment Rating (NEMA TS-2, -40°C to +75°C): Designed for roadside cabinets, traffic signal control enclosures, and industrial outdoor settings. The -40°C to +75°C operating range handles freeze-thaw cycling without crystal-frequency drift or component failure—critical if your receiver sits in an unheated fiber node or roadside kiosk.
• Lifetime Warranty: Manufacturer warranty covers the unit for its operational life, reducing lifecycle cost in long-term deployments.
• Stand-Alone or Rack Mount: ComFit interchangeable housing allows shelf, rack (1U), or DIN-rail mounting (with optional DINBKT1 adaptor). Fits into existing cabinet infrastructure without dedicated rack real estate.
• Hot-Swappable Modules & Bi-Color Status LEDs: LED indicators (red/green) show operating status at a glance—transmit/receive active, fiber loss, or fault. No serial console, no SSH tunnel to confirm signal health.
• Voltage Transient Protection: Surge protection on all power and signal I/O lines guards against lightning, switching transients, and power-line faults common in outdoor/industrial installations.

Integration & Compatibility

The FVR40A4M pairs with the Comnet FVT40A4M transmitter on the camera side. The two units form a transparent analog fiber link—no digital processing, no IP addressing, no VMS integration required. Existing DVRs, analog matrix switchers, and quad splitters connect directly to the receiver's BNC video outputs and audio inputs. This plug-and-play model works in surveillance networks where analog infrastructure dominates, avoiding the capital and licensing burden of IP conversion in remote sites.

For longer runs or additional channels, Comnet manufactures variants with different channel counts and extended reach. If your deployment requires more than four video streams, or if you need redundant fiber paths for critical sites, consult the full Comnet catalog for multi-channel and diversity-enabled units.

Frequently Asked Questions

Q: What's the warranty on the FVR40A4M?

A: Lifetime manufacturer warranty from Comnet, covering defects in materials and workmanship. No time limit.

Q: Can I run the FVR40A4M at the maximum 48 km distance without any optical adjustments?

A: Yes. The wide optical dynamic range and digital encoding eliminate the need for optical attenuators or manual gain adjustment. Plug in the fiber, power the unit, and it automatically compensates for path loss within spec.

Q: Does the FVR40A4M work with color analog cameras?

A: Yes. It is completely transparent to NTSC, PAL, and SECAM camera systems—color, monochrome, or mixed. No firmware changes or compatibility configuration required.

Q: What optical fiber types does the FVR40A4M support?

A: Both multimode and single-mode fiber. Multimode is typical for shorter runs (under 10 km) and easier field termination; single-mode extends to the full 48 km range with better performance over distance.

Q: Can I use the FVR40A4M with a DVR or analog monitoring system?

A: Yes. The four BNC video outputs connect directly to any DVR, analog matrix switcher, quad splitter, or composite monitor. No additional conversion or VMS software required.

Q: Is the FVR40A4M suitable for outdoor cabinet installation?

A: Yes. NEMA TS-2 rating and -40°C to +75°C operating temperature range are designed for outdoor, unconditioned enclosures common in traffic, industrial, and remote monitoring sites.

Eden Phillips

I spec the FVR40A4M in roadside and campus deployments where analog cameras are embedded in infrastructure and running fiber back to a central NOC is the only practical transport. The 10-bit digital encoding is the key differentiator—it guarantees that video fidelity does not degrade over the full 48 km span, which matters for license-plate and facial-recognition workflows at distance. Unlike older analog fiber systems that require manual optical adjustment and suffer visible quality drop beyond 15–20 km, the FVR40A4M's digitized pipeline and wide optical dynamic range handle real-world fiber loss, temperature swings, and aging splices without operator intervention.

Technical Highlights:

• 10-Bit Video Encoding with EIA/TIA RS-250C Compliance: Broadcast-quality video on all four channels with zero degradation to the full 48 km optical range. If your cameras are 30+ km from the headend, analog fiber will show visible noise and color shift; this unit does not.
• 24-Bit/96 kHz Audio with 20 Hz–18 kHz Response: Exceeds typical CCTV audio specs (which often top out at 8–12 kHz). Captures voice intelligibility and ambient environmental sound—critical for incident reconstruction and two-way talk-back in remote gate or facility access scenarios.
• Wide Optical Dynamic Range (No Attenuators Required): The receiver automatically compensates for fiber path loss across aging and temperature extremes. This eliminates the field service cost of optical adjustment—set it once, walk away. In traffic and utility installations, this is a major operational win.
• NEMA TS-2 / -40°C to +75°C Rating: Rated for roadside and outdoor unconditioned cabinets. Most commercial fiber equipment stops at -20°C to 60°C; freeze-thaw cycling in harsh climates will kill cheaper units. This one is designed for multi-year outdoor service.

Deployment Considerations:

• Pair the FVR40A4M with the matching FVT40A4M transmitter. They are sold separately; confirm you have both units before installation.
• Single-mode fiber is recommended for distances above 10 km. Multimode works fine for shorter runs but incurs modal dispersion that limits range; if you spec 48 km, use single-mode at transmit and receive.
• The receiver outputs are composite analog video (BNC) and line-level audio (RCA or XLR). If your headend is IP-based or uses ONVIF cameras, you will need an encoder box downstream—the FVR40A4M itself does not IP-ify the signal.
• Lifetime warranty is a real asset in remote sites where replacement hardware takes weeks and downtime is costly. Confirm serial numbers at install for warranty registration.

Deploy the FVR40A4M in multi-site surveillance networks where analog cameras are permanent and fiber is the backbone transport—highway corridors, utility substations, campus perimeters, and remote industrial facilities benefit most from the range, reliability, and zero-maintenance operation.