Mutec iClock Review

Understanding Digital Clocks

Digital clocks are fundamental to all modern technology, from simple devices to complex broadcast facilities. Issues with clock accuracy, jitter, and rate matching can lead to significant problems in audio and video synchronization. The Mutec iClock addresses these challenges by offering a versatile solution for managing multiple clock rates and formats.

The iClock is designed to maintain defined output clock rates and formats, even when the incoming reference signal changes. This is particularly useful for projects involving different video standards like NTSC and 24Frame film, or various audio sampling rates.

Features and Connectivity

The iClock features a robust rear panel with extensive connectivity options:

• External Inputs: Two BNC connectors and one XLR connector for various reference signals.
• Video Outputs: Two pairs of BNC connectors for video sync signals.
• Word Clock Outputs: Four pairs of BNC connectors, with independent configuration for each pair.
• AES-EBU Outputs: Two pairs of XLR connectors, also independently configurable.
• SPDIF Outputs: Two phono connectors, independently configurable.
• PC Connection: An RJ45 socket for RS485 communication with a PC.

The front panel includes a backlit LCD display for monitoring settings and status, along with four cursor keys for navigation. Three blue LEDs indicate the lock status of the active clock source, and five red LEDs display the status of various system parameters.

Versatile Clocking Capabilities

The iClock supports a wide array of input and output clock signals, including:

• Video: PAL/SECAM and NTSC video sync signals.
• Word Clock: Standard rates, Word clock x 256 (Super Clock), DSD64, DSD128, and DXD (384).
• Digital Audio: AES-EBU (3+11), AES-EBUid (3+11), SPDIF.
• Timekeeping References: GPS, Telecom, DCF77 (German atomic clock), and MSF (UK atomic clock).
• Internal Oscillator: For standalone operation.

The device also offers simultaneous pull-up, pull-down, and varispeed options for Word clock outputs, allowing for precise adjustments within a +/-20% range. This flexibility ensures compatibility with various professional audio and video workflows.

Advanced Synchronization Features

Mutec has incorporated features to ensure stable output even when reference signals are lost or change. The iClock allows users to define tolerance ranges for external references and the time it takes to lock to a new reference. It can be configured to 'Hold' the last received rate (flywheel) or to sequentially lock to available external inputs or the internal generator. This can be done once or recursively using 'Sequence Synchronisation' or 'Cycle Synchronisation' modes.

The 'SoftReLock' feature ensures a smooth and interruption-free transition when the iClock switches to a new reference. The device supports a broad spectrum of audio clock rates from 8kHz to 24.576MHz, including standard sampling rates, DSD, and DXD frequencies. It also accommodates film and video frame rates.

While the iClock does not natively support tri-level sync (used in some high-definition video systems), Mutec has indicated plans to address this in future updates.

Optional Modules and Expandability

The iClock offers optional modules to enhance its functionality:

• Redundant Power Supply: For mission-critical applications requiring backup power.
• Extra Video Sync Generator: For simultaneous PAL and NTSC outputs, and conversion between PAL and NTSC reference signals.
• iC-Alarm: Provides relay-coupled alarm signaling outputs.
• Word Clock or AES-EBU Modules: Each adds four additional outputs in the respective format.

Conclusion

The Mutec iClock is presented as a highly comprehensive and versatile solution for managing clocking needs within an entire installation. Its ability to handle multiple output formats and versatile rates makes it a valuable asset for complex setups. The availability of redundant power supply and alarm options further enhances its suitability for broadcast environments. At its price point, the iClock is considered a compelling value.

Contact Information

MUTEC, GERMANY

Website: www.mutec-net.de