MICROPHONE SWITCHES

PTT Switch

Press this switch to transmit, and release it to receive.

Keypad

These 16 keys generate DTMF tones during transmission.

In the receive mode, these 16 keys can be used for direct frequency entry and/or direct numeric recall of the Memory channels.

The [A], [B], [C], and [D] keys, on receive, replicate the functions of the front panel keys ([MHz(SET)], [REV(D/W)], [LOW(A/N)], and [D/MR(MW)]). See the previous discus- sion.

DTMF MICROPHONE

MH-48

[P1]/[P2]/[P3]/[P4] Buttons

These four keys are user programmable, allowing quick access to features used often. The default functions are described below.

[P1] button (SQL OFF/T.CALL)

In the USA version, pressing this button disables the noise and tone squelch systems. In the EXP version, pressing this button activates T.CALL (1750 Hz) for repeater access. [P2] button (S SRCH)

Press this button to activate the Smart Search feature. [P3] button (T SRCH)

Press this button to activate the Tone Search feature. [P4] button (WX CH)

Press this button to recall the “Weather” broadcast channel bank.

You can reprogram the [P1], [P2], [P3], and [P4] buttons for other functions, if de- sired. See page 45 for details.

LAMP Switch

This switch illuminates the Microphone’s keypad.

LOCK Switch

This switch locks out the Microphone’s buttons (except for the keypad and PTT switch).

[UP]/[DWN] Button

Press (or hold in) either of these buttons to tune (or scan up or down) the operating frequency or through the memory channels. In many ways, these buttons emulate the function of the (rotary) DIAL knob.

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FT-2800M OPERATING MANUAL