1. Product Overview
The Diymore PLJ-096OLED-L1 is a high-performance OLED frequency display module designed for continuous signal frequency measurement. It is primarily used for displaying frequency values in transceivers and similar equipment, and is also suitable for general-purpose frequency measurement. Featuring a unique gate control method and precise gate timing algorithm (non-timed interrupt), it delivers high measurement accuracy.
Key Features:
- Compact and aesthetically pleasing design with dual-button operation and simplified circuitry for ease of use.
- 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 automatically saved to EEPROM; no need to reset upon power-up.
2. Package Contents
Upon opening the package, please verify that all items are present and undamaged:
- Frequency Display Module (x1)
- Signal Cable (x1)
- Power Cable (x1)
3. Setup and Operation
3.1 Powering On
- Connect the power cable to the module's power interface (5V IN). The recommended operating voltage is DC 4.5-9V (5V recommended).
- Press and hold the K1 button to power on the module.
3.2 Signal Input
- Connect the signal source to the RF IN interface on the module using the provided signal cable.
- The module will automatically display the measured frequency on its 0.96-inch OLED screen.
3.3 Controls and Adjustments
The module features two buttons (K1, K2) and several adjustment points on the PCB:
- K1 Button: Used for powering on the module (press and hold).
- K2 Button: Functions as an adjustment key.
- Sensitivity Adjustment: A potentiometer on the PCB allows for fine-tuning the input signal sensitivity.
- Frequency Fine-tuning: Another potentiometer for precise frequency calibration.
- J1 Jumper: Short-circuiting J1 can enable or disable the power supply electronic switch.
3.4 Data Output
The module provides measurement data output via a UART serial port, facilitating secondary development and integration into other systems.
3.5 Settings Persistence
All settings configured on the module are automatically saved to the EEPROM. This means that the settings will be retained even after the module is powered off and can be directly accessed upon subsequent startups without needing to be reset.
3.6 Demonstration Video
4. Specifications
| Parameter | Value |
|---|---|
| Product Name | Frequency Display Module |
| Model | PLJ-096OLED-L1 |
| Operating Voltage | DC 4.5-9V (5V recommended) |
| Operating Current | < 30mA (Test Condition: DC 5V supply) |
| Display Type | 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 output |
| On-board Interfaces | Signal input, power interface |
| Dimensions (L x W x H) | Approx. 27.3mm x 23.3mm x 18mm |
| Mounting Hole Diameter | 2.0mm |
| Application Scenarios | Radio frequency display, radio frequency measurement, oscillation circuit frequency measurement, crystal oscillator frequency screening, embedded applications, general frequency measurement |
5. Maintenance and Precautions
To ensure the longevity and accurate performance of your frequency display module, please observe the following:
- Avoid exposing the instrument to high temperatures, humidity, or dusty environments.
- Prevent severe vibration or physical shock to the module.
- The clock reference was calibrated using GPSDO and sensitivity optimized during factory calibration. Do not adjust these settings yourself unless absolutely necessary and you possess the appropriate calibration equipment.
- The onboard signal input connector is a fragile component. Handle it gently when inserting or removing plugs to prevent damage.
6. Troubleshooting
If you encounter issues with your PLJ-096OLED-L1 module, consider the following:
- No Display: Ensure the power supply is within the recommended DC 4.5-9V range and correctly connected. Check if the K1 button was pressed and held sufficiently to power on.
- Inaccurate Readings: Verify that the signal input is within the 1KHz-100MHz measurement range. Check the signal cable for proper connection and integrity. Avoid adjusting factory-calibrated settings unless you have professional equipment.
- Intermittent Readings: Inspect all connections, especially the signal input connector, for looseness or damage. Ensure the operating environment is free from excessive dust, humidity, or vibration.
- Settings Not Saved: The module automatically saves settings to EEPROM. If settings are not persisting, ensure the module is powered off correctly (if applicable) or check for any unusual power fluctuations.
7. User Tips
- For optimal performance, use a stable 5V DC power supply.
- When integrating into custom projects, utilize the UART serial output for real-time data acquisition and secondary development.
- Consider shielding the module if operating in environments with significant electromagnetic interference to maintain measurement accuracy.
- Always handle the module by its edges to avoid touching sensitive components or the OLED display.
8. Warranty and Support
For warranty information, technical support, or further inquiries, please contact the seller or manufacturer directly. Keep your purchase receipt for any warranty claims.
