What is ACC Mode in PON EYDFA? (Automatic Current Control)
ACC Mode provides direct, linear power management of the PON EYDFA by locking the pump laser diode’s drive current. In this mode, the amplifier ignores fluctuations in input signal and focuses strictly on the electrical energy fed to the active fiber.
- How it Works: The current is set as a percentage of the maximum value defined by the manufacturer.
- Premlink Recommendation: For our PL2000x Series PON EYDFA, the default optimal setting is 80/80%. This ensures high output power while extending the lifespan of the pump lasers.
- Best Use Case: Ideal for stable head-end environments where the input optical power from the 1550nm transmitter is constant and predictable.
What is AGC Mode in PON EYDFA? (Automatic Gain Control)
AGC Mode is a more “intelligent” feedback loop. It maintains a fixed Optical Gain (the ratio between input and output) regardless of fluctuations in the input signal or environmental temperature changes.
- How it Works: Internal sensors constantly monitor the input levels. The PON EYDFA CPU then automatically adjusts the pump laser’s cascade to ensure the output remains at the target gain value.
- The 0dBm Rule: When your input power is exactly 0dBm, the output gain value on the touchscreen will mirror your actual Port Output Power.
- Best Use Case: Perfect for networks with variable input levels or cascading amplifier architectures where gain stability is paramount to prevent signal distortion (CNR/CSO degradation).
| Feature | ACC Mode | AGC Mode |
|---|---|---|
| Control Logic | Fixed Pump Current | Fixed Optical Gain |
| Input Sensitivity | Ignores input changes | Compensates for input changes |
| Stability Focus | Laser Diode Protection | Network Signal Consistency |
| Configuration | Percentage (%) | Decibels (dB) |
FAQ: Managing Your PON EYDFA Configuration
Q1: Can I switch modes while the PL2000x is live?
A: Yes, the Premlink touchscreen interface allows you to tap the “AGC” or “ACC” buttons to switch. However, we recommend checking your output levels immediately to ensure they don’t exceed your optical receiver’s threshold.
Q2: Why is 80% current recommended in ACC mode?
A: Operating at 100% current creates excessive heat and accelerates the aging of the GaAs/GaN components. 80% is the “sweet spot” for long-term reliability without sacrificing significant dBm output.
⚠️ CAUTION: EYE SAFETY FIRST
High-power Class 1M laser radiation is present. NEVER disconnect any fiber connections to the PL2000B PON EYDFA while the unit is powered. Invisible laser light can cause permanent retinal damage in milliseconds.
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