Nobsound VFD253 Audio Spectrum Analyzer Receiver User Manual

1. Pengenalan

The Nobsound VFD253 is a versatile audio device that integrates multiple functions into a single unit. It serves as an audio spectrum analyzer, a Bluetooth receiver, an audio switcher, and a high-precision clock. This manual provides essential information for setting up, operating, and maintaining your VFD253 to ensure optimal performance.

Imej 1.1: The Nobsound VFD253 Audio Spectrum Analyzer Receiver displaying the time.

2. Ciri-ciri Utama

• Reka bentuk pelbagai fungsi: Combines an audio spectrum analyzer, Bluetooth 5.0 receiver, 3.5mm AUX audio switcher, and a high-precision clock.
• High-Resolution VFD Display: Features a 25x15 dedicated green VFD display for accurate visualization of audio frequency bands.
• Input Audio Serbaguna: Includes a built-in microphone pickup, Bluetooth 5.0 connectivity, and two 3.5mm AUX inputs for compatibility with various audio sources like smartphones, PCs, game players, amppengangkat dan pembesar suara.
• Adjustable Display Modes & Brightness: Offers 5 decorative music spectrum display modes and 2 clock display modes. The VFD backlight brightness can be adjusted manually (3 levels) or automatically to suit different environments.
• High-Precision Clock: Equipped with an RX8025T built-in crystal oscillator, providing a clock accuracy of ±3ppm, resulting in an annual error of less than 1 minute.
• Wide Frequency Range & AGC Display: Supports an 80Hz-16KHz frequency sweep. A special Automatic Gain Control (AGC) algorithm and customized output curve ensure optimal visual effects across a wide range of input signal levels, preventing under-display for low inputs and over-display for high inputs.
• Customizable Display Effects: Individual adjustments for gain, brightness, main light column fall speed, hold time, and peak fall speed.
• Memori Matikan: All settings are saved automatically and retained after power cycling, eliminating the need for re-configuration.
• Alat Kawalan Jauh yang Mudah: Allows easy adjustment of all settings from a distance.

Imej 2.1: Berakhirview of the VFD253's multi-functional capabilities, including audio spectrum analysis, Bluetooth, and AUX inputs.

Imej 2.2: The VFD253 displaying an audio spectrum in a typical home audio environment, highlighting its wide frequency range and AGC display.

3. Kandungan Pakej

Sila semak pakej untuk item berikut:

• 1 × Nobsound VFD253 Audio Spectrum Analyzer Receiver
• 1 × Kabel USB Jenis-C
• 1 × Remote Control (Bateri tidak disertakan)

Imej 3.1: The Nobsound VFD253 package contents: the main unit, a USB Type-C cable, and a remote control.

4. Produk Lebihview (Controls and Ports)

Familiarize yourself with the various controls and connection ports on your VFD253 unit.

Imej 4.1: Front panel buttons and rear panel connections of the VFD253. Front buttons include 'Mode -', 'Mode +', and 'Audio source selection / Power switch'. Rear ports include 3.5mm AUX output, microphone pickup, 3.5mm AUX input (IN1), 3.5mm AUX input (IN2), and DC IN (Type-C).

• Butang Panel Depan:
  • Mode -: Decreases display mode or setting value.
  • Mode +: Increases display mode or setting value.
  • Audio Source Selection / Power Switch: Short press to cycle through audio inputs; long press to power on/off.
• Port Panel Belakang:
  • Output AUX 3.5mm: Bersambung ke sebuah amppembesar atau pembesar suara aktif.
  • Pengambilan Mikrofon: Built-in microphone for ambient sound analysis.
  • 3.5mm AUX Input (IN1): Connects to an audio source via 3.5mm cable.
  • 3.5mm AUX Input (IN2): Connects to a second audio source via 3.5mm cable.
  • DC IN (Type-C): Input kuasa untuk unit.

5. Persediaan

1. Sambungan Kuasa: Connect the provided USB Type-C cable to the DC IN port on the rear of the VFD253 and plug the other end into a suitable USB power adapter (5V DC, not included).
2. Hidupkan kuasa: Long press the 'Audio Source Selection / Power Switch' button on the front panel or press the power button on the remote control to turn on the unit.
3. Sambungan Input Audio:
   • Bluetooth: Select Bluetooth input using the front panel button or remote. Enable Bluetooth on your audio source (e.g., smartphone, PC) and pair with 'VFD253'.
   • Input AUX: Connect your audio source (e.g., CD player, PC) to either the IN1 or IN2 3.5mm AUX input port using a 3.5mm audio cable. Select the corresponding AUX input.
   • mikrofon: Select the microphone input to analyze ambient sound.
4. Sambungan Output Audio (Pilihan): If using the VFD253 as an audio switcher, connect the 3.5mm AUX Output port to your amppembesar atau pembesar suara aktif.

6. Arahan Operasi

6.1. Operasi Asas

• Hidupkan/Mati Kuasa: Long press the 'Audio Source Selection / Power Switch' button on the front panel or press the kuasa butang pada alat kawalan jauh.
• Pemilihan Input: Short press the 'Audio Source Selection / Power Switch' button on the front panel or use the Input button on the remote to cycle through AUX1, AUX2, Bluetooth, and Microphone inputs.
• Pemilihan Mod Paparan: Gunakan Mod button on the remote to switch between the 5 music spectrum display modes and 2 clock display modes.
• Pelarasan Kecerahan: Gunakan Kecerahan button on the remote to adjust the VFD display brightness manually (3 levels). The unit also supports automatic brightness adjustment.

6.2. Advanced Settings (via Remote Control)

The remote control provides access to various advanced settings for customizing the display effects.

Imej 6.1: The remote control for the Nobsound VFD253, showing buttons for power, input, mode, brightness, gain, and speed adjustments.

• Pelarasan Keuntungan: Gunakan Gain +/- buttons to adjust the input sensitivity, affecting the height of the spectrum display.
• Fall Speed Adjustment: Gunakan Kelajuan +/- buttons to adjust the fall speed of the main light column and peak indicators.
• Hold Time Adjustment: Adjust the duration for which peak indicators remain on screen.
• MIC Input Toggle: Gunakan MIC button to enable or disable the built-in microphone input.
• Memori Tetapan: All adjustments are automatically saved thanks to the power-off memory function.

7. Mod Paparan

The VFD253 offers a variety of visual display options to enhance your audio experience or provide time information.

7.1. Music Spectrum Display Modes (5 Types)

These modes visualize the audio input in different dynamic patterns on the VFD screen.

Imej 7.1: Examples of various music spectrum display modes available on the VFD253.

Imej 7.2: A terperinci view of one of the music spectrum display modes.

7.2. Clock Display Modes (2 Types)

When no audio signal is detected for a period, or when manually selected, the unit can display the time.

Imej 7.3: A terperinci view of one of the clock display modes.

8. Spesifikasi

9. Penyelesaian masalah

If you encounter any issues with your VFD253, please refer to the following common problems and solutions:

• Tiada Paparan:
  • Ensure the USB Type-C power cable is securely connected and receiving power.
  • Press the power button on the unit or remote to ensure it is turned on.
• No Audio Output (when using AUX Out):
  • Verify that the correct input source (AUX1, AUX2, or Bluetooth) is selected.
  • Check all 3.5mm audio cable connections between the source, VFD253, and your amppembesar/ pembesar suara.
  • Pastikan anda amplifier/speakers are powered on and set to the correct input.
• Display Not Reacting to Audio:
  • Pastikan sumber audio dimainkan dan disambungkan dengan betul.
  • If using microphone input, ensure the MIC input is enabled and there is ambient sound.
  • Laraskan Keuntungan setting via the remote control to increase sensitivity.
• Isu Berpasangan Bluetooth:
  • Ensure the VFD253 is set to Bluetooth input mode.
  • Disable and re-enable Bluetooth on your audio source device.
  • Move the audio source closer to the VFD253 to ensure a strong signal.
• Alat Kawalan Jauh Tidak Berfungsi:
  • Periksa dan gantikan bateri pada alat kawalan jauh.
  • Ensure there is a clear line of sight between the remote and the VFD253.

10. Penyelenggaraan

To ensure the longevity and proper functioning of your Nobsound VFD253, follow these maintenance guidelines:

• Pembersihan: Use a soft, dry cloth to wipe the unit. Avoid using abrasive cleaners, solvents, or chemical sprays, as these can damage the finish or internal components.
• Persekitaran: Place the unit in a dry, well-ventilated area away from direct sunlight, high temperatures, humidity, and strong magnetic fields.
• Pengendalian: Kendalikan unit ini dengan berhati-hati. Elakkan daripada menjatuhkan atau menyebabkannya terkena hentaman kuat.
• Pembongkaran: Jangan cuba membuka atau mengubah suai unit. Ini akan membatalkan waranti dan boleh menyebabkan kerosakan atau kecederaan.

11. Waranti dan Sokongan

Nobsound products are designed for reliability and performance. For warranty information, technical support, or service inquiries, please refer to the official Nobsound webtapak atau hubungi pengedar sah anda.

• Sokongan dalam talian: Visit the official Nobsound website for FAQs, product updates, and contact information.
• Perkhidmatan Pelanggan: If you require further assistance, please contact Nobsound customer support with your product model and purchase details.