Specifications

40
maintained if a KXBC3 option module and an internal battery are installed.
TUN PWR
NOR
If set to NOR, TUNE power level follows the POWER knob. Otherwise,
establishes a fixed power level for TUNE, overriding the present POWER knob
setting. Note1: TUN PWR does not pertain to ATU TUNE, which always uses 2
or 3 watts and is internally controlled. It also does not apply to transverter bands
using the low-power KXV3 output (XVTR OUT).
TX BIAS
ppp qqq
Transmit bias constants. See Transmit Bias, pg. 32.
TXCRNUL
1 nnnn
Used at the factory to null the transmit carrier on each band. See Transmit
Carrier, pg. 34.
TX EQ
+0 dB,
each band
Transmit audio graphic equalizer (voice modes only). Functions the same as RX
EQ, above. TX EQ can be adjusted during transmit. SSB TX EQ is separate from
TX EQ for other voice modes. Not applicable to CW or DATA modes.
Do not use high settings of TX EQ without carefully monitoring your
signal. Most microphones, including the Elecraft MH3, will provide good
audio quality with little or no TX EQ. High settings can cause distortion.
TX ESSB
OFF 3.0
Extended SSB transmit bandwidth (3.0 to 4.0 kHz) or OFF. Tap 1 to turn on/off
and rotate VFO A to select the bandwidth. (Also see pg. 22.)
TX GAIN
ALC nn
Shows transmit gain constant for the present band and power setting. Two gain
constants are used: one for PWR settings of 5.0 watts or less, and the other for
PWR settings of 5.1 watts or higher. The gain constants are calibrated whenever
the TUNE function is activated at exactly 4.0 or 6.0 W. See Transmit Gain
calibration procedure, pg. 33.
Transmit ALC can be turned off for 2-tone testing or other purposes by tapping
DLY while in this menu entry. (This is NOT necessary for any operational
purpose. In DATA modes, ALC is already optimized for low distortion.) When
ALC is turned off, a (-) sign is added to the parameter, e.g. -ALC nn. Also, an
asterisk is added to the PWR control value when it is being adjusted (e.g. 5.0
W*). In this case, the displayed power level will not change; the control functions
as a fine power adjustment, and its effect should be observed with an external
instrument.
TX GATE
OFF 0
The TX noise gate can be used to suppress transmitted audio below a certain
level, e.g. that of an amplifier fan. Tap 1 within the TX GATE menu entry to turn
the noise gate on/off. Use VFO A to set the desired threshold. Since there’s no
visual indication that transmit audio is below the threshold, you should adjust it
using the transmit voice monitor (MON), ideally while using headphones. Set the
threshold high enough to cut off transmit audio due to local noise, but not so high
that it causes your voice to drop out too frequently.
TXSBNUL
GAIN nnn
Used at the factory to null transmit opposite sideband. See Transmit Sideband,
pg. 34.
VFO CRS
Per-mode
Per-mode coarse tuning rate (hold KHZ and tune VFO A or B). Also applies to
the RIT/XIT tuning knob if MENU:VFO OFS is set to ON, and both RIT and
XIT are turned off.
VFO CTS
256
VFO counts per turn. Use 128 for easier fine-tuning of VFO; use 256 for faster
tuning. Note: The KHZ tuning rate always uses 128 counts per turn.
VFO NR
OFF
VFO tuning noise reduction. If VFO tuning noise is heard on a given band, set to
ON. The setting is stored per-band. Typically it would be used only on 6 meters
or other high-frequency bands. (Also see RX SHFT.)
VFO OFS
ON
If ON, the RIT/XIT offset control can be used to tune VFO A in large steps when
RIT / XIT are off and the OFS function of the OFS/VFO B knob is selected. Step
sizes vary by mode (see VFO CRS), and are the same as the KHZ tuning rates.