ELECRAFT K4 - TX

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other per-VFO controls to target VFO B/sub RX. Tap [B SET] or <SUB
RX> again to exit B SET mode.
TX
To configure the transmitter, tap <TX>, then tap the desired secondary
function. Most of these functions are common to all operating modes;
exceptions are noted below.
<ANT CFG>: Specifies behavior of the ANT switch (transmit antenna).
See ANTENNA SELECTION.
<TX EQ>: Transmit 8-band graphic equalizer. TX EQ only applies in
voice and CW modes.
NOTE: In regular SSB mode, menu entry "TX Audio LF Cutoff, SSB" also
impacts the audio passband. It can be used to select a nominal 200 Hz
(default) or 100 Hz (extended) low-frequency cutoff. The 100 Hz
setting is always use in EESB mode.
<LINE IN>: Sets up LINE IN sources and audio levels. You can select
SOUNDCARD (digital audio via the USB type B jack) or LINE IN (analog
audio jack). Each can have a different level.
<MIC INP>: Tap this button to select the microphone audio source
(front mic, rear mic, LINE IN, or a combination of these).
<MIC CFG>: Sets up front/rear mic gain and bias. For the front mic
only, configures buttons (NONE or UP/DN). For an Elecraft MH4 mic,
turn bias on, set preamp gain to 0, and enable all buttons. Mics with
low-output elements may require higher preamp gain settings.
<VOX GN>: Sets audio-operated transmit sensitivity. This only applies
in voice modes or applicable data modes (DATA, AFSK), with [VOX]
turned on.
<ANTIVOX>: Sets anti-VOX level. The higher the level, the less likely
that audio from the K4's speaker(s) will trigger voice transmit.
The remaining <TX> secondary functions are defined for some
operating modes, as described below.
CW, PSK, FSK
The following settings apply to the internal keyer. They apply to FSK