Aug 1, 2026 · 49 min · 12 segments
G1C – Transmitter power regulations; data emission standards; 60-meter operation requirements. Demonstration of PEP vs Average Power. Effective Radiated Power. 49:22
But I'm going to have to get my laptop out here because we're going to need a transceiver.
And I just happen to have one that's 20 feet away from us, so my arm won't quite reach it.
Well, we're going to be talking about peak envelope power versus average power.
So peak envelope power is the average power over a single radio frequency cycle at the crest of modulation.
at the occasional or continuously repeating crest of a modulation envelope under normal operating conditions.
Many regulatory authorities use PEP to set maximum power standards for radio transmitters in certain services.
Assuming a linear, perfectly symmetrical 100% modulation of a carrier, PEP output of an AM transmitter is four times its carrier.
In other words, a typical modern 100-watt amateur transceiver is usually rated for no more than 25 watts of carrier output when operating an AM.
PEP, peak envelope power versus average power, and average you can think of that as pretty much RMS.
PEP is equal to steady carrier power, or for CW, a dot or a dash, average power.
In a properly formed CW transmission, PEP is also equal to average power in a steady carrier.
Although average power is the same as PEP for complex modulation forms like FM and FSK, the peak envelope power bears no particular ratio or mathematical relationship to longer term average power in distorted envelopes such as CWA waveforms with power overshoot or with amplitude modulated waveforms such as single sideband and AM voice transmissions.
Typical average power of a single sideband voice transmission is 10 to 20% of PEP.
Typical average power of a single sideband voice transmission is only 10 to 20% of peak envelope power.
But I'm going to have to get my laptop out here because we're going to need a transceiver.
And I just happen to have one that's 20 feet away from us, so my arm won't quite reach it.
Well, we're going to be talking about peak envelope power versus average power.
So peak envelope power is the average power over a single radio frequency cycle at the crest of modulation.
at the occasional or continuously repeating crest of a modulation envelope under normal operating conditions.
Many regulatory authorities use PEP to set maximum power standards for radio transmitters in certain services.
Assuming a linear, perfectly symmetrical 100% modulation of a carrier, PEP output of an AM transmitter is four times its carrier.
In other words, a typical modern 100-watt amateur transceiver is usually rated for no more than 25 watts of carrier output when operating an AM.
PEP, peak envelope power versus average power, and average you can think of that as pretty much RMS.
PEP is equal to steady carrier power, or for CW, a dot or a dash, average power.
In a properly formed CW transmission, PEP is also equal to average power in a steady carrier.
Although average power is the same as PEP for complex modulation forms like FM and FSK, the peak envelope power bears no particular ratio or mathematical relationship to longer term average power in distorted envelopes such as CWA waveforms with power overshoot or with amplitude modulated waveforms such as single sideband and AM voice transmissions.
Typical average power of a single sideband voice transmission is 10 to 20% of PEP.
Typical average power of a single sideband voice transmission is only 10 to 20% of peak envelope power.
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