The TCM is a 10-module, 3U 19" rack-mounted multi-function unit designed for commentator stations. It is composed of 10 pull-out sliding modules.

Starting from the left side of the frontal panel we find:

Modules 1-2: Video Distributors

• 2 independent distributors per module
• Loop through input
• 2 outputs per distributor
• Adjustable GAIN, HF, and LF settings

Module 3: Video Switcher

• 4x1 configuration (4 inputs, 1 output)

Modules 4-5: Microphone Amplifiers

• Dual independent sections
• Accepts mic (-50 dB) and line (0 dB) levels
• Configurable limiter
• Output level control
• Supports 2 mono or 1 stereo channel

Module 6: Audio RX

• Stereo or 2 mono line input
• Galvanically isolated inputs/outputs
• Signal level adjustment

Module 7: Power Amplifier

• Receives signals from Audio Switcher
• Adjustable LEFT/RIGHT output gain
• Two headphone outputs with independent gain

Module 8: Stereo Audio Switcher

• 3x1 configuration
• Selects between Mic Amplifiers and Video Switcher

Modules 9-10: Power Supplies

• Parallel redundant power supply
• Provides +12VDC, -12VDC, +5VDC
• Continuous operation if one supply fails