preliminary datasheet

C 425 FM RDS / AM Tuner

Features

RDS PS (Station name) and RT (Radio text) 8 Character preset naming capability for AM & non-RDS 30 Station random presets (AM or FM) VFL display Dimmer (3-position) Sleep mode MOS-FET RF Front End RS-232 Interface IR Input NAD TNR 1 Full Function Remote Control
Details The NAD Model C425 builds on the strengths of previous NAD Tuners by offering a quality of reception that is as good as or better than the quality of todays broadcasts. A new RF Front End has improved sensitivity for cleaner reception in fringe reception areas, and we have lowered noise across the audio spectrum. The rear panels IR Input and RS-232 port allow the C425 to be easily integrated with the sophisticated system controllers used in Custom Installation. We have also improved the user interface by adding a 24 position rotary encoder knob to more quickly tune stations or select preset stations. Additionally, all functions are available via the included IR Remote Control. Features With 30 presets available you can store all your favorite radio stations. These presets can be any combination of AM and FM stations: 25 presets for FM and 5 for AM, or 17 for FM and 13 for AM, for instance. To avoid having to scroll through 30 presets, the un-programmed (empty) ones are skipped to give you quick access to all your favorite stations. Instead of littering the front panel with buttons and features that are hardly ever used, the NAD Model C425 concentrates on convenience in daily operation. The RDS limits itself to the RDS PS and RT function, both of which enhance ease of operation. The RDS PS (Program Service) will automatically indicate the name of the radio station you are listening to in the display, e.g. BBC R1, so you will always know exactly what station you are listening to. At the touch of a button RDS RT (Radio Text) will display additional information broadcast by the radio station, such as the presenter, which music is playing, etc. For AM and non-RDS stations the C425 allows you to name each preset individually with up to 8 characters. Once you have named your presets you dont need to remember which frequency goes with what radio station, the name is indicated in the display every time the preset is recalled. All the preset information is stored in the C425s non-volatile memory, which means it will remember all of its preset information even if the unit has been unplugged for a prolonged amount of time. Auto Search automatically stops at the next strong radio signal it comes across and optimizes tuning. Weaker radio stations can be tuned into manually. Stations that are quiet in Mono but noisy in Stereo can benefit from the Blend feature that narrows stereo separation and improves noise. FM Mute eliminates inter-station tuning noise and only allows strong and clear stations to emerge from the silent background. Apart from its ease-of-use, the NAD Model C425 also offers features to get the maximum out of the airwaves. The MOS-FET RF Front End design together with high quality components and careful PCB layout guarantees excellent sensitivity with low intermodulation distortion to provide quiet and musically satisfying performance.
Although AM can never reach the quality of any FM transmission, the Model C425s AM section retains excellent clarity together with lowest possible background noise.
Whether you are looking for excellent performance, ease of use or the convenience of RDS, the Model C425 offers all these with the low price / high performance ratio that NAD is so renowned for.
SPECIFICATIONS FM Tuner Section Usable input sensitivity; FM mono Usable input sensitivity; FM stereo 50dB Quieting sensitivity; FM mono 50dB Quieting sensitivity; FM mono Capture ratio (FM) Image rejection Harmonic distortion; FM mono Harmonic distortion; FM stereo Signal/noise; mono Signal/noise; stereo Channel separation at 1kHz Frequency response AM Tuner Section Usable sensitivity Selectivity Image rejection IF rejection Signal/noise ratio Harmonic distortion Physical Specifications Dimensions (W x H x D) Net Weight Shipping Weight

17 1/8 x 3 3/16 x 11 1/4 (435 x 80 x 285mm) 8.8 lbs (4kg) 11.22 lbs (5.1kg) 24dBV 21dB 40dB 45dB 45dB 0.30% 2.2V, IHF 16V, IHF 4V 28V 2.4dB >60dB 0.2% 0.3% 78dB 72dB >45dB 15Hz-15kHz, 0.75dB
NAD Electronics International reserves the right to change specications or features without notice. NAD is a registered trademark of NAD Electronics International. All r permission of NAD Electronics International. 07/06 NAD Electronics International.

www.NADelectronics.com

C425 Remote Command List
Description AM Blend Digit 0 Digit 1 Digit 2 Digit 3 Digit 4 Digit 5 Digit 6 Digit 7 Digit 8 Digit 9 Dimmer Display Enter FM FM Mute/Mode Power Off Power On Preset Down Preset Up Sleep Tune Down Tune Up Command Hex Dec C8A 138 8E 150 8B 139 8F 152 FCFFDDFDDFull RS232 Command Hex Dec 01,16,82,02,67 1,22,130,2,103 01,16,35,02,B4 1,22,53,2,180 01,16,C7,02,22 1,22,199,2,34 01,16,8A,02,5F 1,22,138,2,95 01,16,8E,02,5B 1,22,142,2,91 01,16,92,02,57 1,22,146,2,87 01,16,96,02,53 1,22,150,2,83 01,16,8B,02,5E,5E 1,22,139,2,94,94 01,16,8F,02,5A 1,22,143,2,90 01,16,93,02,56 1,22,147,2,86 01,16,97,02,52 1,22,151,2,82 01,16,98,02,51 1,22,152,2,81 01,16,F2,02,F7 1,22,242,2,247 01,16,26,02,C3 1,22,38,2,195 01,16,C5,02,24 1,22,197,2,36 01,16,81,02,68 1,22,129,2,104 01,16,37,02,B2 1,22,55,2,178 01,16,F1,02,F8 1,22,241,2,248 01,16,F0,02,F9 1,22,240,2,249 01,16,D1,02,18 1,22,209,2,24 01,16,D2,02,17 1,22,210,2,23 01,16,F3,02,F6 1,22,243,2,246 01,16,D3,02,16 1,22,211,2,22 01,16,D4,02,15 1,22,212,2,21
Note: IR commands use NEC encoding with customer code 877C (34684)