Signal Strength Meter
The signal strength meter is a simulated analog meter (needle-style) that indicates the strength of the received signal in S-units plus decibels (dB). Amateur radio operators are used to making quick visual checks of this indicator when giving signal reports to the operators they contact.
Spectrum Scope
The spectrum scope is a basic spectrum analyzer feature that shows signals on the current band segment. This helps eliminate scanning for transmissions because they are visually displayed and the operator can tune directly to the strongest signal or to a signal on or near a desired frequency (such as a communications net frequency).
Transmit Power Level and SWR
The operator can observe transmit power to ensure regulatory compliance in reduced power band segments or to keep the power level to that required by a contest. Standing Wave Ratio (SWR) indicates how well the antenna is matched to the transmitter output. The operator can use this indicator to tune the antenna as required or to monitor for antenna problems.
ALC and Compression Level
Automatic Level Control (ALC) can be used to automatically adjust the power output when driving a high power linear amplifier. The ALC value on the IC-7600's meter panel shows the automatic adjustment signal. The IC-7600 also provides RF voice compression for an optimized signal, indicated by the compression level display.
Final Amplifier Values
The drain terminal voltage (Vd), the drain current of the final amplifier (Id) and the temperature of the PA circuit (TEMP) are useful for monitoring the final or power amplifier for problems. They are not commonly used by amateurs in regular transceiver operation, but they help to avoid expensive repairs.