Many firms now rely on high-frequency trading to capture tiny price discrepancies across markets.

The technician confirmed that the device communicates using frequency shift keying as its modulation method.

Engineers chose frequency-shift keying to send telemetry from the satellite because of its resilience to noise.

Naval engineers measured how extremely low frequency signals propagate through seawater to improve undersea communication.

The submarine uses ultra low frequency for long-range communication.

During the contest, the ham operator checked the maximum usable frequency before transmitting to ensure his signal would reach across the ocean.

The engineers analyzed the ultra high frequency to determine why the TV broadcasts were experiencing interference.

The radar operates in the super high frequency range to achieve better resolution for short-range targets.

Technicians monitored several radio frequencies during the emergency drill.

In the lab, the professor measured the angular frequencies of the coupled oscillators to compare their energy distributions.