Specifications
41
TIME
N/A
Real-time-clock view/set. Tap 1 / 2 / 3 to set HH / MM / SS. To see the time and
other displays during normal operation, tap DISP (see pg. 11). Time is only
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, the
parameter sets a fixed power level (0-10 W) for TUNE, overriding the present
POWER knob setting.
Note: TUN PWR does not pertain to ATU TUNE, which uses 2 or 3 W
(KXAT3) or 5 W (KXAT100).
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 whether transmit ALC (automatic level control) is enabled, along with the
transmit gain constant for the present band and power setting (nn). 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.
If a KXPA100 is connected via the remote-control cable, PA MODE is ON, and
PWR is 10 W or higher, the TX GAIN parameter shows the KX3 drive level for
75 W output at the KXPA100. If the drive value is preceded by a the letter ‘A’, it
was obtained from the KXPA100 (factory calibration value). If the drive value is
preceded by the letter ‘t’, it was obtained by doing P out CAL at 75 W at the
KX3 itself (see MENU:PA MODE). Holding CLR will erase the KX3’s CAL
value on the present band, restoring the ‘A’ value (from the KXPA100).
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.