Gelung Induksi Adastra AmpManual Pengguna lifier LA-300 mkII

pengenalan

This manual provides comprehensive instructions for the safe and efficient operation of your Adastra Induction Loop Amplifier LA-300 mkII. Please read this manual thoroughly before use and retain it for future reference.

The Adastra LA-300 mkII is an induction amplifier designed to drive a cable loop, providing assisted listening for hearing aid users in public and commercial buildings. It is suitable for hearing aids fitted with a "T" switch.

Arahan Keselamatan

• Bekalan Kuasa: Ensure the correct power supply (110/240Vac, 50/60Hz) is used as specified. Disconnect from mains before cleaning or servicing.
• Pengudaraan: Jangan sekat bukaan pengudaraan. Pastikan aliran udara yang mencukupi di sekeliling unit untuk mengelakkan terlalu panas.
• Kelembapan: Jangan dedahkan unit kepada hujan atau lembapan. Elakkan meletakkan objek yang diisi dengan cecair, seperti pasu, pada unit.
• Servis: Rujuk semua servis kepada kakitangan perkhidmatan yang berkelayakan. Jangan cuba membaiki unit sendiri.
• penempatan: Letakkan unit di atas permukaan yang stabil dan rata. Elakkan meletakkannya berhampiran sumber haba atau di bawah cahaya matahari langsung.
• Loop Cable: Ensure the induction loop cable is installed correctly and safely to avoid tripping hazards.

Kandungan Pakej

Please check the contents of the packaging to ensure all items are present and in good condition.

• Gelung Induksi Adastra Amplifier LA-300 mkII
• IEC Mains Power Cable
• Manual Pengguna (dokumen ini)

Image: The Adastra LA-300 mkII Induction Loop Amplifier as packaged in its brown cardboard box, indicating the model name and "300m² max. area coverage".

Ciri-ciri Produk

The Adastra LA-300 mkII Induction Loop Amplifier menawarkan ciri-ciri utama berikut:

• Suitable for hearing aids fitted with a "T" switch.
• Mic/line level switch for each input.
• Phantom power switch for each input.
• Tamper proof channel volume, bass & treble and loop current level controls.
• Adjustable metal loss correction.
• Alarm contacts for built-in siren.
• Priority switchable for channel 1.
• Peak current LED indication.
• 19" rack mountable design.

Kawalan dan Sambungan

Panel Depan

Image: Front panel of the Adastra LA-300 mkII amplifier, showing input level controls (CH1, CH2, CH3), Bass, Treble, Loop Current, Siren, Peak Current LEDs, and Power switch.

1. CH1, CH2, CH3 Input Level Controls: Adjusts the input sensitivity for each channel. These are tamper-proof and require a screwdriver.
2. Kawalan Bes: Adjusts the low-frequency response. Tamper-bukti.
3. Kawalan Treble: Adjusts the high-frequency response. Tamper-bukti.
4. Loop Current Control: Adjusts the output current to the induction loop. Tamper-bukti.
5. Siren LED: Indicates activation of the built-in siren (if connected to alarm contacts).
6. Peak Current LEDs: A series of LEDs indicating the output current level to the loop, helping to prevent overload.
7. Suis kuasa: Toggles the unit on/off.

Panel Belakang

Image: Rear panel of the Adastra LA-300 mkII amplifier, showing the IEC power inlet, voltage selector, loop output/alarm contacts, and three input channels (XLR/RCA combo jacks) with associated switches, plus metal loss correction control.

1. Saluran Masuk Utama IEC: Menghubungkan amplifier to the mains power supply using the provided IEC cable.
2. Voltage Pemilih: Switch to select between 110V and 240V operation. Ensure this is set correctly for your region.
3. Loop Output / Alarm Contacts: Terminal block for connecting the induction loop cable and external alarm systems.
4. CH1, CH2, CH3 Inputs: Combo XLR/RCA jacks for connecting audio sources. Each channel has associated switches for Mic/Line level and Phantom Power.
5. Pembetulan Kehilangan Logam: Rotary control to compensate for signal loss caused by metal structures in the building.

Persediaan

1. Induction Loop Installation

The induction loop cable should be installed around the perimeter of the area where assisted listening is required. Ensure the loop forms a complete circuit. Consult a professional for optimal loop design and installation for larger or complex areas.

• Connect the ends of the induction loop cable to the "LOOP OUTPUT" terminals on the rear panel.
• Ensure correct polarity if specified by your loop cable manufacturer.

2. Sambungan Input Audio

Connect your audio sources (microphones, line-level devices) to the CH1, CH2, or CH3 inputs on the rear panel.

• Use XLR connectors for microphones or balanced line-level signals.
• Use RCA connectors for unbalanced line-level signals.
• Set the Mic/Line switch for each channel according to the connected device.
• Activate Phantom Power if using condenser microphones that require it.

3. Sambungan Kuasa

• Before connecting power, verify the Voltage Selector switch on the rear panel is set to the correct voltage untuk kawasan anda (110V atau 240V).
• Connect the supplied IEC mains power cable to the IEC inlet on the rear panel and then to a suitable mains power outlet.

Arahan Operasi

1. Hidupkan kuasa

Press the Power switch on the front panel to turn on the unit. The Power LED will illuminate.

2. Initial Level Setting

Using a small flat-head screwdriver, carefully adjust the tamper-proof controls on the front panel:

• Tetapkan CH1, CH2, CH3 Input Level Controls to a low setting initially.
• Tetapkan Bass dan Treble controls to their center (flat) position.
• Tetapkan Loop Current Control kepada tetapan rendah.

3. Melaraskan Tahap Audio

Play an audio source through one of the connected inputs. Gradually increase the corresponding Input Level Control until the Peak Current LEDs begin to illuminate, indicating signal presence. Adjust the Loop Current Control to achieve the desired field strength within the loop area. The Peak Current LEDs should ideally fluctuate in the green/yellow range, occasionally touching red during peak audio levels.

Use the Bass and Treble controls to fine-tune the audio quality for clarity and intelligibility within the loop area.

4. Metal Loss Correction

If the installation environment contains significant metal structures (e.g., reinforced concrete, metal ceilings), these can cause frequency-dependent signal loss. Use the Metal Loss Correction control on the rear panel to compensate for this. Adjust it while monitoring the sound quality within the loop area to achieve a balanced frequency response.

5. Priority Function (Channel 1)

Channel 1 has a switchable priority function. When activated, audio on Channel 1 will automatically duck (reduce the volume of) audio on Channels 2 and 3, making Channel 1 the dominant source. This is useful for announcements or emergency messages.

Penyelenggaraan

• Pembersihan: Disconnect the unit from the mains power. Use a soft, dry cloth to clean the exterior. Do not use abrasive cleaners or solvents.
• Pengudaraan: Periodically check that the ventilation grilles are free from dust and debris to ensure proper cooling.
• Pemeriksaan: Regularly inspect all cables and connections for any signs of wear or damage.
• Storan: Jika menyimpan unit untuk tempoh yang lama, pastikan ia disimpan di tempat yang sejuk dan kering, jauh dari cahaya matahari langsung dan suhu yang melampau.

Menyelesaikan masalah

Spesifikasi

Waranti dan Sokongan

Adastra products are designed and manufactured to the highest standards. For warranty information and technical support, please refer to the warranty card included with your product or visit the official Adastra webtapak. Sila simpan bukti pembelian anda untuk sebarang tuntutan waranti.

For further assistance or troubleshooting not covered in this manual, please contact Adastra customer support or your local distributor.