Specifications

21
SSB/CW VFO Offset
The KX3 can automatically offset the VFO
frequency when you switch from SSB to CW mode,
so other stations will hear the correct CW pitch. See
MENU:CW WGHT for details.
Digital Voice Recorder (DVR)
You can record two voice messages of up to 15
seconds each, such as your call sign or a CQ, and
play them back one time or with auto-repeat.
Use the transmit voice monitor to hear DVR
playback. Hold MON , then set the level while
speaking into the mic. 5 is a good starting point.
DVR Record: Hold REC , then tap 1 or 2 on the
numeric keypad. The current message will be
erased (4 seconds). When prompted, tap XMIT and
start speaking into the mic immediately (no need to
push PTT). Tap XMIT again to terminate record.
MIC gain cannot be adjusted during DVR message
play. The gain setting at time of recording is used.
DVR Play: Tap MSG , then tap 1 or 2 . To cancel,
tap XMIT or hit the keyer paddle or hand key. To
auto-repeat a message, tap MSG , but then hold
rather than tap 1 or 2 . MENU:MSG RPT sets
the repeat interval (1 to 255 seconds).
Transmit Noise Gate
The noise gate function mutes mic audio below a
selected audio threshold. This is useful in vehicles
and when operating in noisy outdoor environments.
See MENU:TX GATE for details.
Transmit Inhibit and External PTT
The GPIO pin of the ACC2 connector can be
configured as a transmit inhibit or PTT input by
setting MENU:ACC2 IO to the desired setting.
Cross-Mode Operation and
CW-in-SSB
Cross-mode operation is possible in some cases. For
example, you could set up VFO A for SSB receive,
and VFO B for CW transmit, then enter SPLIT.
You can also send CW when SSB mode is
selected for VFO A just by hitting the key. The SSB
station will hear the signal at your sidetone pitch.
See MENU:CW WGHT for details (pg. 35).
Transverter Bands
Nine user-definable bands are provided for use with
transverters. These can be used with the Elecraft
KX3-2M internal 2-m module, Elecraft XV-Series,
or other transverters.
The KX3 does not have a low-level
transverter output; transverters are driven from
the main antenna jack. This requires the use of
transverters that have a common receive/transmit
antenna jack and associated T/R switching. Consult
the transverter manual for drive power limitations
and switching requirements.
The ACC2 jack provides a keyline output for
keying transverters. The ACC2 jack also provides a
GPIO pin that can be used to select among multiple
transverters based on the band selected at the KX3.
This is further explained below.
Transverter Band Setup
Transverter bands are set up using the XV menu
entries, as follows:
! Locate the XVn ON menu entry. Tap 1 – 9 to
specify which transverter band to configure. Set
the parameter to YES to enable band n .
! XVn RF sets the operating frequency (MHz).
! XVn IF specifies the I.F. band (7, 14, 21, 28, or
50 MHz). Use 50 MHz for the KX3-2M option.
! XVn PWR sets maximum KX3 power output
for the current transverter band in watts (0-1).
Use 0.3 watts for the KX3-2M option.
! XVn OFS can compensate for frequency offset
in the transverter’s oscillator. (An offset is not
required for the KX3-2M module, since its
oscillator signal is derived from the KX3’s
main synthesizer. If there is a frequency error,
calibrate synthesizer using REF CAL.)
! XVn ADR should be set to INT TRN 0 for use
with the KX3-2M module. It can also be used
to specify an optional Elecraft XV-series
transverter selection address. Only addresses
TRN1-TRN7 are recognized for this purpose.
To select XV-series transverters using this
method, set MENU:ACC2 IO to TRN CTRL,
and connect the ACC2 jack’s GPIO pin to the
transverter’s auxBus line.