Kenwood TM-251A Instruction Manual page 68

CALL/VFO SCAN
Use Call/VFO scan to monitor both the Call channel and
the current VFO frequency.
1 Press [VFO].
2 Press microphone [CALL] (1 s).
3 To cancel Call/VFO Scan, press any key other than
the microphone DTMF keypad keys.
CALL/MEMORY SCAN
1 Press [MR].
2 Press microphone [CALL] (1 s).
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