1. Introduction
The JUNCTEK DPA-1698 and DPA-2698 are high-performance dual-channel power signal amplifiers designed for a wide range of applications. Both models feature a robust high-strength aluminum alloy casing, ensuring excellent durability and efficient heat dissipation. These amplifiers are capable of amplifying the input signal voltage amplitude by 2 times (6dB gain).
They are fully compatible with JUNCTEK signal generators and can also function as standalone power amplifiers with signal sources from other manufacturers. Their versatility makes them suitable for use in educational instruments, industrial control systems, production line testing, metal detection, medical therapy, medical aesthetics, and ultrasonic equipment driving.
2. Product Overview
2.1. Key Features
- Dual-channel signal amplification.
- 6dB (2 times) voltage amplification.
- High-strength aluminum alloy casing for durability and efficient heat dissipation.
- Wide frequency range (0-100kHz for DPA-1698, 0-10MHz for DPA-2698).
- Compatible with various signal generators.
- Compact and lightweight design.
2.2. Components and Interfaces
The amplifier unit features clearly labeled input and output BNC connectors, a DC power input, and a cooling fan for sustained operation.
3. Specifications
3.1. DPA-1698 Specifications
| Item | Parameter |
|---|---|
| Signal Bandwidth | 0~100kHz |
| Input Voltage Range | 0~20Vpp |
| Output Voltage Range | 0~40Vpp |
| Voltage Gain | 6dB (Amplification by 2 times) |
| Maximum Output Current | 1A |
| Maximum Output Power | 10W*2 |
| Output Impedance | ≤1Ω |
| Output Phase | Same as Input |
| Distortion | ≤1% |
| Output Signal Flatness | ±1dB |
| Input Power Supply Voltage | DC12V±10% |
| Maximum Input Current | 5A |
| Dimensions (L*W*H) | 139*80*37.5 (mm) |
| Weight | 351g |
3.2. DPA-2698 Specifications
| Item | Parameter |
|---|---|
| Signal Bandwidth | 0~10MHz |
| Input Voltage Range | 0~20Vpp |
| Output Voltage Range | 0~25Vpp |
| Voltage Gain | 6dB (Amplification by 2 times) |
| Maximum Output Current | 0.5A |
| Maximum Output Power | 5W*2 |
| Output Impedance | ≤5Ω |
| Output Phase | Same as Input |
| Distortion | ≤1% |
| Output Signal Flatness | ±1dB |
| Input Power Supply Voltage | DC12V±10% |
| Maximum Input Current | 5A |
| Dimensions (L*W*H) | 139*80*37.5 (mm) |
| Weight | 351g |
4. Setup and Installation
4.1. What's in the Box
Upon unpacking, please verify that all items are present:
- JUNCTEK DPA-1698 or DPA-2698 Power Signal Amplifier unit.
- DC12V Power Adapter (EU or US plug type, may vary).
- BNC Cables (quantity may vary, typically for input/output connections).
4.2. Power Connection
- Ensure the power adapter matches the required DC12V±10% input voltage.
- Connect the DC power adapter to the "DC12V" input jack on the amplifier unit.
- Plug the power adapter into a suitable wall outlet.
4.3. Signal Connections
The amplifier features two independent channels (IN1/OUT1 and IN2/OUT2).
- Connect your signal generator or other signal source to the "IN1" and/or "IN2" BNC input connectors using appropriate BNC cables.
- Connect your load, oscilloscope, or other measurement/application device to the "OUT1" and/or "OUT2" BNC output connectors.
- Ensure all BNC connections are secure.
Note: The amplifier is designed to work with signal generators from JUNCTEK and other manufacturers. Ensure your signal source's output voltage range is within the amplifier's specified input voltage range (0-20Vpp).
5. Operation
The JUNCTEK DPA-1698/DPA-2698 amplifier operates by providing a fixed voltage gain of 6dB (2 times amplification) to the input signal. There are no user-adjustable controls on the unit itself, making operation straightforward.
- Power On: Once all connections (power and signal) are made, the unit will power on. The integrated display will show key operating parameters.
- Signal Amplification: The amplifier will automatically amplify the input signal(s) from IN1/IN2 and output the amplified signal(s) via OUT1/OUT2.
- Monitoring: Observe the amplified signal on your connected oscilloscope or measurement device.
Caution: Do not exceed the maximum input voltage range (0-20Vpp) or the maximum output current (1A for DPA-1698, 0.5A for DPA-2698) to prevent damage to the amplifier or connected equipment.
6. Maintenance
To ensure the longevity and optimal performance of your JUNCTEK power signal amplifier, follow these maintenance guidelines:
- Cleaning: Use a soft, dry cloth to clean the exterior of the unit. Avoid using abrasive cleaners or solvents.
- Ventilation: The aluminum alloy casing and integrated fan are designed for efficient heat dissipation. Ensure that the fan vents on the sides of the unit are not obstructed to allow for proper airflow.
- Storage: Store the amplifier in a dry, dust-free environment away from direct sunlight and extreme temperatures.
- Power Supply: Always use the provided or a compatible DC12V power adapter. Using an incorrect power supply can damage the unit.
7. Troubleshooting
If you encounter issues with your amplifier, please refer to the following common troubleshooting steps:
| Problem | Possible Cause | Solution |
|---|---|---|
| No power/Display off | Power adapter not connected or faulty; power outlet issue. | Check power adapter connection. Ensure power outlet is functional. Try a different power adapter if available and compatible. |
| No output signal | Input signal missing or incorrect; faulty BNC cables; output device not connected or faulty. | Verify input signal from source. Check BNC cable connections. Test with different cables or output device. |
| Distorted output signal | Input signal too high (clipping); faulty input signal; amplifier overloaded. | Reduce input signal voltage (Vpp) from your signal generator. Check the quality of the input signal. Ensure output current/power limits are not exceeded. |
| Unit overheating | Obstructed ventilation; prolonged operation at maximum load. | Ensure fan vents are clear. Reduce load or allow the unit to cool down. |
8. User Tips
No specific user tips were available from customer reviews or Q&A for this product. However, general best practices for using precision electronic equipment include:
- Always double-check your connections before powering on.
- Start with lower signal amplitudes and gradually increase to avoid overloading.
- Keep the work area clean and organized to prevent accidental disconnections or damage.
9. Warranty and Support
For warranty information, technical support, or service inquiries, please contact the seller or JUNCTEK Official Store directly. Retain your proof of purchase for any warranty claims.
