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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)
The KX3’s built-in DVR function lets you record
up to two short voice messages, such as your call
sign or a CQ, and play them back one time or with
auto-repeat. DVR messages are recorded and
played in the same manner as CW/data messages,
using MS G and RE C (pg. 16), except that only
message buffers 1 and 2 are available.
It is not necessary to use the microphone’s PTT
switch or the XMIT switch when recording a DVR
message. Recording starts as soon as you hold
RE C , then tap a numbered switch.
MIC gain cannot be adjusted during DVR message
play. The gain setting at time of recording is used.
Transmit Noise Gate
The noise gate function mutes mic audio below a
selected threshold; that is, if you stop talking, your
on-air signal will drop to zero rather than transmit
wind noise, etc. This is useful in vehicles and when
operating in noisy outdoor environments. See
MENU:TX GATE for details.
Transmit Inhibit
The GPIO pin of the ACC2 connector can be
configured as a transmit inhibit input by setting
MENU:ACC2 IO to L O= Inh (0 V) or HI= Inh
(5 V). Holding this pin at the selected state will then
prevent transmit.
Cross-Mode Operation
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 SP L IT .
You can send CW when SSB mode is selected
for VFO A just by hitting the key or paddle; there’s
no need to use cross-mode split in this case. 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 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
TR N 1-T RN 7 are recognized for this purpose.
To select XV-series transverters using this
method, set MENU:ACC2 IO to TRN C TR L,
and connect the ACC2 jack’s GPIO pin to the
transverter’s auxBus line.
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