4 double function keys and hold time selection, 5 mode selection of built-in electronic keyer, 7 power-on message – Kenwood 50 MHZ ALL MODE TRANSCEIVER TS-590S User Manual
Page 47: 4 double function keys and hold time, Selection, 5 mode selection of built-in electronic, Keyer, 6 switchover of shift frequency, Interlocked with change of pitch frequency

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