The NAD C 445 is an FM/AM/DAB Tuner designed for high-quality radio reception and listening enjoyment. It combines traditional analog radio capabilities with modern digital audio broadcasting (DAB) and Radio Data System (RDS) features, offering a versatile and user-friendly experience.

Function Description:

The C 445 serves as a central component for receiving radio broadcasts, delivering clear, interference-free audio. It supports three primary frequency bands: FM, AM, and DAB.

DAB (Digital Audio Broadcasting): This feature allows for the reception of CD-like quality radio programs without the common interferences and signal distortions associated with analog broadcasts. DAB signals are less susceptible to problems caused by geographical features (mountains), urban structures (high-rise buildings), and weather conditions. The tuner performs an automatic scan to find available local digital stations upon initialization, presenting them in an alphanumeric list. Users can scroll through this list, select stations, and store up to 99 DAB presets. The DAB mode also offers various information settings, including Dynamic Label Segment (DLS) for scrolling text, Program Type (PTY), Multiplex Name, Time and Date, Bitrate, and Channel and Frequency. It includes a Signal Error Rate display to show the level of correction applied to maintain audio quality and a Dynamic Range Control (DRC) feature to adjust compression levels for different program types, helping to normalize sound levels between stations. A manual tune option is available for finding stations not detected during auto-tune or for antenna positioning.
FM/AM (Frequency Modulation/Amplitude Modulation): The C 445 is fully capable of tuning into traditional FM and AM broadcast stations. It supports both manual and automatic tuning modes. For FM, it can receive stereo broadcasts, with an option to switch to mono mode for improved reception of weak signals. The tuner allows for storing up to 30 FM and 30 AM presets, which can be programmed manually or automatically using an auto-preset function that scans the entire band.
RDS (Radio Data System): For FM broadcasts, RDS provides additional information such as station call signs (Program Service), program type (PTY), text messages (Radio Text), and the correct time (CLOCK TIME). The C 445 can display this information and allows users to search for specific program types (PTY Search).

Important Technical Specifications:

FM Section:
- Frequency Range: 87.50 MHz to 108.00 MHz (50 kHz steps)
- Signal-to-Noise Ratio: 65dB (Mono), 60dB (Stereo)
- Presets: 30
AM Section:
- Frequency Range: 522 kHz to 1620 kHz (9 kHz steps)
- Signal-to-Noise Ratio: 35dB
- Presets: 30
DAB Section:
- Band III: 174MHz - 240MHz
- Band L: 1452MHz - 1492MHz
- Max signal: ~ -3dBm
- Sensitivity: -96dBm
- Adjacent Channel Rejection: -35dB
- Presets: 99
- Display: 2-line by 16-character DOT Matrix
- Audio Output Stereo: 2.5V P-P, 16 bit sample resolution
- Optical S/PDIF: IEC60958 Compliant, 48kHz sample rate, 24 bit sample resolution
General:
- Power Requirement: 230-240V AC, 50Hz
- Power Consumption: 12W (0.8W standby)
- Dimensions (MAX): 435 x 86 x 318mm (Width x Height x Depth)
- Weight: 6kg

Usage Features:

Front Panel Controls: The C 445 features a clear and intuitive front panel.
- System Power Control: Toggles between ON (green indicator) and Standby (amber indicator).
- Band Selector: Switches between DAB, FM, and AM bands.
- Menu/FM Mute Selector: In DAB, activates features like Dynamic Range Control, preset tune, manual tune, or station order. In FM, selects stereo or mono mode.
- Auto Tune Button: In DAB, initiates an automatic scan for available stations (short press) or a full scan (long press).
- Memory Button: Accesses preset storage locations.
- Dimmer Button: Adjusts the brightness of the front panel display.
- Info Button: Changes the content of the lower display line in DAB (time, date, signal error rate, etc.) and cycles through RDS options in FM.
- Information Display: A dual-line display provides messages and status indications.
- Control Ring: Used for tuning stations (lower/higher frequency), navigating menus, and adjusting parameters.
- ENTER Button: Selects auto tune, manual tune, or preset tune in FM/AM, and selects displayed station in DAB.
Remote Control: A comprehensive remote control duplicates most front panel functions, including numeric keys for direct preset entry, scroll/tune buttons, and a clear button for deleting presets.
Connections:
- FM Antenna: For indoor or external FM antennas.
- AM Antenna: Connects to the supplied AM loop antenna or an external AM antenna.
- Analogue Audio Outputs: RCA jacks for connecting to a pre-amplifier or integrated amplifier for analog audio playback.
- Optical Digital Output: For connecting to a digital input on a pre-amplifier or integrated amplifier, specifically for DAB signals.
- DAB Antenna: Connects to the supplied DAB antenna or an external DAB antenna.
- AC Power Cord: Standard power connection.
Preset Management: Stores up to 99 DAB presets and 30 FM/AM presets. Auto-preset function simplifies storing stations. Presets can be easily recalled using the control ring, scroll/tune buttons, or numeric keys on the remote.
Display Information: The DOT-matrix display provides detailed information, including station names, program types, time, and signal strength indicators.

Maintenance Features:

Troubleshooting Guide: The manual includes a comprehensive troubleshooting section to address common issues such as no power, no sound, distorted sound, buzzing/hissing, "No stations Available" messages, or abnormal display operation.
Reset Functionality: Users can reset the C 445 Tuner to factory settings by pressing and holding the Menu/FM Mute Button for 5 seconds, which will clear all tuner presets. A physical RESET switch is also available on the rear panel.
Environmental Protection: The product is designed with environmental considerations, indicating that it should not be disposed of with regular household waste but returned to a collection point for recycling electrical and electronic equipment. The materials are reusable, contributing to environmental protection.
Backup System: The tuner retains programmed presets for up to 14 days even when unplugged from the AC wall outlet, thanks to its internal backup system.
Antenna Placement Guidance: Recommendations are provided for optimal antenna placement to improve sound and reception quality, including keeping the unit away from RF emission sources and metal objects, and connecting a ground wire for external antennas.

NAD C 445 - Page 16

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