52BASIC OPERATION0102■ Frequency selectionIC-A210 has two ways to select a desired frequency.ï General frequency selectionSelect a desired frequency which is used for the next operat-ing frequency in the standby frequency indicator. Then ex-change the active frequency for the standby frequency.NOTE: Operate from “Standby frequency selection(Step1-2)” to “Frequency exchanging (Step 2-2)” as pages 5, 6.ï Direct frequency selectionA desired frequency direct selection is available.Refer to “Direct frequency selection mode operation.”■ Standby frequency selection(Step 1-2)q Rotate [VOL] clockwise to turn power ON.• Previously used frequencies appear in the active andstandby frequency indicators.w Rotate [DIAL] and [O-DIAL] to select a desired frequencyto the standby frequency.• The active frequency is not affected.• Rotate [O-DIAL] to set above 1 MHz digit.• Rotate [DIAL] to set below 100 kHz digit.TIP: For quick frequency setting, often used frequen-cies can be programmed into memory channels. Refer to“MEMORY OPERATION” (pp. 9–18).When a memory channel is recalled, the previous standbyfrequency is erased.CAUTION: DO NOT turn the power ON until the air-craft engines have been started. It is very important forprotection of the power supply circuit.