1. Einleitung
The Audio DSP DNR is a compact and powerful digital signal processing (DSP) device designed to significantly improve the audio quality from radio receivers, especially shortwave radios. It effectively reduces unwanted noise and applies digital filtering to enhance signal clarity, making communication clearer and more enjoyable. This device is ideal for integrating with older radio stations that lack built-in noise reduction capabilities.
2. Packungsinhalt
Bitte prüfen Sie das Paket auf folgende Artikel:
- 1 x Audio DSP DNR Host Unit
- 1 x 3.5-mm-Audiokabel.
- 1 x USB Type-C Data Cable (for power supply)
- 1 x Set of Machine Corner Pads
3. Geräteaufbau und Bedienelemente
Familiarize yourself with the various controls and indicators on your Audio DSP DNR unit:
- EIN/AUS-Taste: Schaltet das Gerät ein oder aus.
- PWR Port: 5V Micro USB power supply input.
- IN-Port: 3.5mm audio signal input. Connect your radio receiver's audio output here.
- OUT-Port: 3.5mm audio output. Connect to an external speaker or power ampschwerer.
- Project Selection Buttons (▼ ▲): Used to navigate and select between DNR (Digital Noise Reduction) and FLT (Digital Filter) settings.
- Level Adjustment Buttons (◀ ▶): Adjust the level or grade of the selected DNR or FLT setting.
- Volume Adjustment Knob (+ VOL -): Steuert die Ausgangslautstärke.
- Bildschirm: Shows current settings, audio spectrum, and other indicators.
- Audio Spectrum Display: Visual representation of the incoming audio signal.
- Eingebauter Lautsprecher: Provides direct audio output from the unit.
- 'OL' Indicator: Displays 'OL' on the screen if the input signal amplitude is too large, indicating potential overload.
4. Einrichtungsanweisungen
- Stromanschluss: Connect the provided USB Type-C data cable to the PWR port on the Audio DSP DNR unit and to a 5V USB power source (e.g., a USB wall adapter, computer USB port).
- Audioeingang: Use the provided 3.5mm audio cable to connect the audio output of your radio receiver to the 'IN' port on the Audio DSP DNR unit.
- Audioausgang: Connect an external speaker or power amplifier to the 'OUT' port using a 3.5mm audio cable. Alternatively, you can use the built-in speaker for direct audio.
- Platzierung: Attach the machine corner pads to the bottom of the unit for stability and to prevent scratching surfaces.
5. Bedienungsanleitung
- Einschalten: Press the ON/OFF button to turn on the device. The display screen will illuminate.
- Lautstärke anpassen: Use the '+ VOL -' knob to set your desired output volume.
- Select Function (DNR/FLT):
- Use the '▼' and '▲' buttons to select between 'DNR' (Digital Noise Reduction) and 'FLT' (Digital Filter) modes. The currently selected item will be indicated on the display.
- Adjust DNR (Digital Noise Reduction):
- When 'DNR' is selected, use the '◀' and '▶' buttons to adjust the noise reduction level. There are 10 grades of noise reduction. Experiment to find the optimal level for your audio source.
- Adjust FLT (Digital Filter):
- When 'FLT' is selected, use the '◀' and '▶' buttons to choose from 10 different digital filter levels. These include:
Figure 3: Display showing DNR and FLT settings. - 200Hz Low Pass Filter (LPF)
- 500Hz Low Pass Filter (LPF)
- 700Hz Low Pass Filter (LPF)
- 1kHz Low Pass Filter (LPF)
- 1.8kHz Low Pass Filter (LPF)
- 2kHz Low Pass Filter (LPF)
- 2.4kHz Low Pass Filter (LPF)
- 3.5kHz Low Pass Filter (LPF)
- 6kHz Low Pass Filter (LPF)
- Through (no filter applied)
The filter and noise canceller can be used together freely to achieve the best audio clarity.
- Monitor Audio Spectrum: The display provides a real-time audio spectrum, allowing you to visually monitor the processed signal.
- Ausschalten: Press the ON/OFF button again to turn off the device when not in use.
6. Wartung
- Reinigung: Verwenden Sie zum Reinigen des Geräts ein weiches, trockenes Tuch. Vermeiden Sie die Verwendung von scharfen Chemikalien oder scheuernden Materialien.
- Lagerung: Bewahren Sie das Gerät an einem kühlen, trockenen Ort fern von direkter Sonneneinstrahlung und extremen Temperaturen auf.
- Handhabung: Behandeln Sie das Gerät vorsichtig, um physische Schäden zu vermeiden.
7. Fehlerbehebung
| Problem | Mögliche Ursache | Lösung |
|---|---|---|
| Gerät lässt sich nicht einschalten | No power supply or faulty cable | Ensure USB Type-C cable is securely connected to a 5V power source. Try a different cable or power adapter. |
| Keine Audioausgabe | Incorrect audio connections, volume too low, or external speaker issue | Check 3.5mm audio cable connections to IN/OUT ports. Increase volume using the '+ VOL -' knob. Test with a different external speaker or use the built-in speaker. |
| 'OL' displayed on screen | Eingangssignal amplitude is too large | Reduce the audio output volume from your radio receiver or source device. |
| Noise reduction/filtering is ineffective | DNR/FLT levels not optimally set | Experiment with different DNR grades and FLT frequencies using the adjustment buttons to find the best setting for your specific noise environment. |
8. Spezifikationen
| Besonderheit | Spezifikation |
|---|---|
| Modell | DSP noise reducer (Audio DSP DNR) |
| Artikelnummer | AL-282 |
| Stromversorgung | 5V Micro USB (Type-C input) |
| Audioeingang | 3.5-mm-Buchse |
| Audioausgang | 3.5mm Jack, Built-in Speaker |
| DNR Levels | 10 Noten |
| FLT Levels | 10 levels (200Hz, 500Hz, 700Hz, 1kHz, 1.8kHz, 2kHz, 2.4kHz, 3.5kHz, 6kHz LPF, Through) |
| Abmessungen (L x B x H) | 100 mm x 70 mm x 17 mm (3.9 Zoll x 2.8 Zoll x 0.7 Zoll) |
| Ungefähres Gewicht (verpackt) | 170g |
| Kategorie Heimwerkerbedarf | Elektrisch |
| Herkunft | Festlandchina |
9. Benutzertipps
- Experimentieren Sie mit den Einstellungen: The effectiveness of DNR and FLT can vary greatly depending on the type of noise and the audio source. Take time to experiment with different combinations of DNR grades and FLT frequencies to find the optimal settings for your specific listening conditions.
- Optimal Input Level: Avoid overdriving the input. If you see the 'OL' indicator, reduce the input volume from your radio to prevent distortion and ensure proper DSP processing.
- External Speaker Quality: While the device has a built-in speaker, connecting it to a high-quality external speaker or amplifier will provide a much better listening experience and allow you to fully appreciate the improved audio clarity.
10. Garantie und Support
Bei Fragen, technischem Support oder Garantieansprüchen wenden Sie sich bitte direkt an den Verkäufer oder Hersteller. Bewahren Sie Ihren Kaufbeleg als Kaufnachweis auf.
