AOR SR2000A Instruction Manual page 16

Press the FREQ key to reassign the frequency control to the dial knob.
Start and End Frequency Input
In the VFO mode, the step key enables the step size for tuning the receiver to be
customized. Pressing the STEP key will select the tuning step in reverse contrast. Then
rotate the dial to select a new step size. To confirm the entry, press the MHz key.
There are 13 preprogrammed step sizes as follows:
0.1, 0.5, 1.0, 2.0, 5.0, 6.25, 8.33, 9.0, 10.0, 12.5, 25.0, 50.0, and 100.0 KHz.
In addition, unusual step sizes may be entered by using the numeric keypad in 0.1KHz
increments. Acceptable input range is 0.1KHz to 100KHz.
To enter the main frequency:
Press the FREQ key which will display the frequency in reverse contrast.
To enter the receiver tuning step, press the STEP key. Rotate the dial knob to
select the desired tuning step, and press the MHz key.
You may enter the step frequency by the numeric keypad, and press the MHz
key.
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