Updated: June 2025

What Is Off-Air Broadcast Compliance Logging?

Off-air compliance logging refers to the process of capturing and recording broadcast content as it is received over-the-air, providing a verifiable and independent audit trail for legal, regulatory, and commercial purposes.

Unlike traditional logging systems that tap into a broadcaster’s output feed (e.g., master control or playout), off-air logging captures the signal as received by the audience—via antenna, cable, or satellite. This ensures that what was logged reflects what viewers actually saw and heard, including any transmission issues, misfires, or discrepancies between intended and aired content.

Off-air logging is especially critical in jurisdictions like the United States and European Union, where regulators (e.g., FCC, Ofcom, CSA) require that broadcasters retain proof of air for a specific duration, particularly for political ads, emergency messages, and sponsorship content. It is also heavily used for ad verification, signal integrity auditing, competitive monitoring, and legal dispute resolution.

Broadcasters, agencies, and compliance vendors rely on specialised off-air broadcast compliance loggers to capture these feeds independently, archive them securely, and provide searchable playback and clip export.

How Off-Air Compliance Logging Works

Off-air logging systems work by receiving a broadcast signal (via RF, QAM, DVB-T/S/C, or ATSC) through antennas or decoders, then recording the entire feed in real time.

Key functions include:

• Signal acquisition via tuner cards, antennas, or demodulators

• Multi-channel recording of HD/SD content, with timestamping

• Retention policies for 30–365 days (or longer) based on regulation

• Playback and review interfaces for quick access and QA

• Clip export for legal, regulatory, or commercial evidence

• Redundant storage to ensure zero signal loss

• Optional metadata tagging via overlay or external logs

“With Actus recording and logging system, time consuming processes became immediate and efficient for all concerned teams. The recorded contents are readily available 24 x 7 for review, clip creation and can be exported immediately when needed.” – Gilbert D. Tan, TOC Supervisor, Cignal TV

When Is Off-Air Logging Required?

Off-air logging is typically required or recommended in scenarios where:

• Regulatory compliance requires recording what viewers actually received

• Ad verification is needed for third-party audits (e.g., political campaigns)

• Signal chain validation is required (e.g., discrepancies between playout and output)

• Competitive monitoring captures how and when competitors air content

• Legal disputes involve claims about content, timing, or transmission issues

In the U.S., off-air logging is often used in FCC political ad verification and public file audits. In the EU, it supports cross-border signal compliance, must-carry enforcement, and public broadcaster oversight.

Benefits of Off-Air Compliance Logging

• Independent verification of what actually aired

• Trusted audit trail that’s legally defensible

• No reliance on internal broadcast chain (protects against MCR errors or overrides)

• Supports full compliance workflows—from signal to archive

• Ideal for network operators, regulators, and legal teams

“We have expanded the system and now it also records our Transport Streams and we can monitor all the video feeds from one unified user’s interface.” – Roengrit Sereejumroenrojn, Director of Engineering at True Visions

Deployment Options

Actus and other vendors offer flexible deployment models for off-air logging:

• On-premise receivers and recorders with dedicated tuners

• Centralised data centre capture with remote access portals

• Cloud-based logging and playback portals with antenna-to-cloud integrations

• Hybrid systems using edge signal acquisition and centralised archiving

These can be configured to monitor a single market, multiple cities, or even across international borders for global networks or regulators.

FAQs

What’s the difference between off-air logging and playout logging?

Playout logging records what was sent out by your system; off-air logging captures what the viewer actually received—including any discrepancies or delivery issues.

Is off-air logging legally required?

In many jurisdictions, yes—especially for political ads, EAS testing, or regulated public content. Even when not required, it is often used to protect against disputes or missed logs.

How many channels can I log simultaneously?

Systems like Actus support dozens or even hundreds of concurrent off-air channels, depending on tuner configuration and hardware specs.

Can I export clips with time stamps?

Yes. Off-air loggers allow frame-accurate clip export with time/date metadata for regulators, agencies, or legal counsel.

Is off-air logging supported for OTT or FAST channels?

No. Off-air refers specifically to RF or cable delivery. For OTT/FAST compliance, separate IP-based monitoring is required.