PEP Power Calculator

PEP Formula:

\[ PEP = \frac{V_{peak}^2}{2 \times R} \]

Peak Envelope Power (PEP):

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1. What is PEP (Peak Envelope Power)?

Definition: PEP is the highest power level occurring during a transmission, measured at the crest of the modulation envelope.

Purpose: It's used in radio communications to specify transmitter output power and ensure compliance with regulations.

2. How Does the Calculator Work?

The calculator uses the formula:

\[ PEP = \frac{V_{peak}^2}{2 \times R} \]

Where:

\( PEP \) — Peak envelope power (Watts)
\( V_{peak} \) — Peak voltage (Volts)
\( R \) — Resistance (Ohms, typically 50Ω for RF systems)

Explanation: The formula calculates the instantaneous peak power delivered to a load when the voltage is at its maximum.

3. Importance of PEP Calculation

Details: Proper PEP calculation ensures transmitter compliance with licensing requirements and prevents equipment damage from excessive power.

4. Using the Calculator

Tips: Enter the peak voltage in volts and system resistance (default 50Ω). All values must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: Why is resistance typically 50Ω?
A: 50Ω is the standard impedance for most RF systems, providing a balance between power handling and signal integrity.

Q2: How is V_peak measured?
A: Using an oscilloscope to capture the highest voltage point in the waveform.

Q3: What's the difference between PEP and average power?
A: PEP measures instantaneous peaks while average power considers the full modulation cycle.

Q4: When would I use a different resistance value?
A: For non-RF applications or specialized equipment with different impedance requirements.

Q5: How does PEP relate to transmitter power ratings?
A: Licensing and equipment specs often specify maximum PEP to limit interference and ensure safety.