1. Product Overview
The Gaqqee PLJ-096OLED-L1 is a compact and cost-effective OLED frequency display module designed for continuous signal frequency measurement. It is primarily used for displaying frequency values in transceivers and similar equipment, but is also suitable for general-purpose frequency measurement in various electronic projects and laboratory settings. This module features a unique gate control method and a precise gate timing algorithm (non-timed interrupt) to ensure high measurement accuracy.
2. Key Features
- Compact and aesthetically pleasing design with dual-button operation and simplified circuitry.
- On-board power supply electronic switch supports battery operation with shielding capability.
- Temperature-compensated VC-TCXO timing base ensures high stability with frequency accuracy of ±2.5ppm.
- Unique gate control and algorithm eliminate timing interrupts for enhanced measurement precision.
- Settings are automatically saved to EEPROM, eliminating the need to reset upon power-up.
- Measurement data serial port output (UART) for real-time data and secondary development.
3. Setup and Connections
Before operating the module, ensure proper power supply and signal connections.
3.1 Power Supply
- The module operates on a DC voltage range of 4.5-9V. A 5V DC supply is recommended for optimal performance.
- Connect the power supply to the 5V IN interface on the module. Ensure correct polarity (red wire for positive, black for negative).
3.2 Signal Input
- Connect the signal to be measured to the RF IN interface.
- The input impedance is high impedance.
- Caution: The onboard signal input connector is a fragile component. Handle it gently when inserting or removing plugs to prevent damage.
4. Operating Instructions
The module features a 0.96-inch OLED display and dual-button operation for ease of use.
4.1 Basic Operation
- Once powered on, the module will automatically begin measuring the frequency of the signal connected to the RF IN port.
- The measured frequency will be displayed on the OLED screen.
- The module uses a precise gate timing algorithm (non-timed interrupt) for accurate measurements.
4.2 Button Functions (K1, K2)
The module is equipped with two buttons, K1 and K2, for various adjustments:
- K1: Typically used for power on (press and hold) and navigating menus or adjusting settings.
- K2: Used for navigating menus or adjusting settings, often in conjunction with K1.
- Specific functions for K1 and K2 may include:
- Sensitivity adjustment: Fine-tune the input sensitivity for stable readings.
- Frequency Fine-tuning: Adjust the frequency reference if necessary (though factory calibrated).
- Gate Time Selection: Switch between 0.1 and 1.0 second gate times for different measurement speeds and resolutions.
- All settings are automatically saved to the EEPROM, so they will be retained even after power cycling.
4.3 Measurement Data Output
The module provides measurement data via a UART serial port output, facilitating real-time data logging and secondary development for custom applications.
5. Maintenance and Care
- Avoid exposing the instrument to high temperatures, humidity, or dusty environments.
- Prevent severe vibration or physical shock to the module.
- Keep the module clean and free from debris. Use a soft, dry cloth for cleaning.
- Ensure proper ventilation if integrating into an enclosure to prevent overheating.
6. Troubleshooting
This section addresses common issues and provides guidance for resolution.
6.1 Inaccurate or Unstable Readings
- Ensure the signal input is within the specified measurement range (1KHz-100MHz).
- Check the signal strength; a weak signal might lead to unstable readings.
- Verify that the input signal connector is securely and gently attached.
- The clock reference and sensitivity are factory calibrated. Avoid adjusting these settings unless you have specialized equipment and knowledge, as improper adjustment can lead to inaccuracies.
6.2 Module Not Powering On
- Confirm that the DC power supply is within the 4.5-9V range (5V recommended) and connected with correct polarity.
- Check the power cable for any damage or loose connections.
- Ensure the on-board power supply electronic switch is in the ON position if applicable.
7. Specifications
| Parameter | Value |
|---|---|
| Product Name | Frequency Display Module |
| Model Number | PLJ-096OLED-L1 |
| Brand Name | Gaqqee |
| Operating Voltage | DC 4.5-9V (5V recommended) |
| Operating Current | < 30mA (Test Condition: DC 5V supply) |
| Display | 0.96-inch OLED |
| Gate Time | 0.1 / 1.0 seconds |
| Measurement Accuracy | 10/1Hz |
| Measurement Range | 1KHz-100MHz |
| Input Impedance | High impedance |
| Timing Stability | ±2.5ppm |
| Measurement Data Output | UART serial port output |
| On-board Interfaces | Signal input, power interface |
| Dimensions (L x W x H) | 2.8 x 2.75 x 1.8 cm (approx. 28 x 27.5 x 18 mm) |
| DIY Supplies | Electrical |
| Origin | Mainland China |
| Certification | CE |
8. User Tips
- Stable Power: Always use a stable DC 5V power supply for consistent and accurate measurements.
- Gentle Handling: The RF input connector is delicate. Always handle it with care to avoid bending or breaking pins.
- Environmental Protection: Protect the module from dust, moisture, and extreme temperatures to prolong its lifespan.
- Experimentation: Utilize the UART serial output for integrating the frequency data into custom projects or for logging measurements over time.
- Factory Calibration: Trust the factory calibration for clock reference and sensitivity. Avoid unnecessary adjustments to maintain accuracy.
9. Warranty and Support
For warranty claims, technical support, or further inquiries, please contact the seller or manufacturer directly. Keep your purchase records for reference.