Via an acoustic signal the strength of the signal is notable.

A Received Signal Strength Indicator (RSSI) circuitry provides the control signal (80), which is proportional to the strength of the received signal.

The strength of signal may also be detected.

The MS measures (11) the received signal strength of the radio signal over a plurality of frames, and calculates (12) an average received signal strength.

The terminal may periodically measure the received signal strength of the assigned carrier and may compare the received signal strength against the switch threshold.

A measurement (RSSI) is indicative of the strength of the received signal.

The control signal (130) varies in response to a received signal strength.

Signal – The signal strength of the client is displayed.

Signal: Displays the strength of the clients signal.

The signal strength information may be used to indicate that the signal strength is sufficient to perform further signal processing.

Then, the relationship between receiver performance and amplified signal strength is modified in response the processed signal quality and the processed signal energy.

The method further comprises: measuring signal quality; measuring signal energy; and, modifying a relationship between receiver performance and amplified signal strength, in response to the measured signal quality and measured signal energy.

The computing unit (19) discriminates the operated key, based on the receiving signal strength information and the strength of the signal outputted from the signal generator (16), and specifies the inputted instruction.

To determine the signal strength, the arithmetic average of the signal power over a given period of the preamble is used.

Signal – The strength of the network signal is displayed in this field.