The date of the frequency change to 1050 kHz is unknown.

This frequency change was approved on May 11, 2009.

The station ended up on 560 in the mid-1950s after a series of upgrades and frequency changes.

It must be able to detect frequency changes in four-tenths of a second.

The frequency change took place on Friday, February 27, 2009.

Time steps occurred every few months thereafter, and frequency changes at the end of each year.

Another frequency change came in January 1995 and Z93 was now at 92.5.

That sounds simple, but we're talking about measuring a very slow frequency change.

As frequency changes, the dynamic power will change linearly with it.

A list of contact frequencies was prepared giving an expected 12 frequency changes for the whole route.