Executing Class Two Permissive Changes for Substituted Host Antennas
Substituted host antennas qualify for Class II Permissive Changes only when peak gain stays below certified limits and radiative physical structure remains identical.
Continuous Wave Transmission Mode
Meaning
An operational state of a radio transmitter that produces a constant, unmodulated sinusoidal signal for test and measurement purposes. During electromagnetic compatibility testing, the continuous wave transmission mode is activated to evaluate the peak power output and harmonic emissions of the transmitter. This mode eliminates the variables introduced by complex digital modulation schemes.
Operating Mechanism
The state focuses the entire energy output of the transmitter into a single frequency spike. Generating this signal requires the baseband processor to bypass the packetizer.
Test Utility
Engineers use the signal to calibrate receiver circuits and measure antenna gain. Testing a device in continuous wave transmission mode allows laboratories to pinpoint the source of spurious emissions without interference from transient data spikes. It provides a clear baseline for regulatory limits.
Thermal Impact
Operating the radio at a hundred percent duty cycle generates maximum heat dissipation in the power amplifier. Because continuous wave transmission mode holds the transmitter in a permanent active state, it creates a severe thermal stress scenario that differs from standard bursty traffic. Long exposures in this mode can damage unshielded components during laboratory testing, meaning that testing technicians must monitor the internal case temperature or apply external cooling.