Transmit Crystal Filter Selection (Per-Mode)
This step applies only to filters on the RF board.
• Select CW mode by tapping MODE .
• Use VFO B to find the FLTX CW menu entry.
• Rotate VFO A to select a CW transmit filter
(2.7 or 2.8 kHz). Note: Key clicks may result if
a narrower filter is selected for CW transmit.
• Tap MODE to select LSB or USB. The menu
entry will become FLTX SB.
• Select the filter to be used during SSB and
DATA transmit (2.7 or 2.8 kHz).
• If applicable, select a 6- or 13 kHz filter for AM
and ESSB (FLTX AM), and 13 kHz for FM
(FLTX FM).
If you’re using a 2.7-kHz 5-pole filter for SSB
transmit, you can optionally fine-tune its FLx FRQ
parameter to equalize LSB and USB transmit
characteristics. Monitor with a separate receiver and
use headphones, or have another station listen.
Module Enables
This section explains how to set up the various K3S
internal modules. Some are supplied with the basic
K3S, while others are optional. Module set up can
be performed at any time.
Be sure to save your configuration using
K3 Utility each time you change menu settings.
Once any option module has been installed, use the
associated CONFIG menu entry to enable it (see
below). Then turn the K3S off for 5 seconds, and
back on so the K3S can find and test the module.
• KAT3A ATU module: set KAT3A to BYP. If
you also have a KAT500 ATU (external 500-W
antenna tuner) connected to the K3S, refer to
the KAT3A menu entry for details on how to
enable VFO tracking. This can be used to keep
the KAT500 ATU’s L-network updated as you
tune VFO A on the K3S. (In SPLIT mode, the
VFO B frequency is sent to the KAT500 rather
than VFO A.)
• KBPF3A general-coverage band-pass filter
module: set KBPF3A to NOR (if you’re
installing a KBPF3A on the sub receiver, first
tap SUB in the menu entry).
• KXV3B RF I/O module: set KXV3B to NOR.
If the menu entry name is shown as KXV3
(without the B suffix), tap 9 to change it. This
is required before preamp 2 can be used. (See
CONFIG:PREAMP2 for details on enabling
preamp 2.) If you see ERR XV3, see
Troubleshooting.
• KPA3A amplifier module: set the KPA3 menu
entry to PA NOR. See menu entry description
for information on other KPA3 settings.
• KRX3A sub receiver: set KRX3A to match
your selected configuration for the sub
receiver’s AUX antenna: ANT=ATU (KAT3)
or ANT=BNC (AUX RF jack, rear panel). For
details on sub receiver antennas, see pg. 39.
You may also need to set up crystal filters for
the sub receiver as described on the previous
page.
• K144XV 2-meter module: Set up all transverter
menu entries for this band (starting with
CONFIG XVn ON, etc.).
• K3EXREF: If your K3S is equipped with a
K3EXREF module (to lock the synthesizers to
an external 10-MHz reference), see
CONFIG:REF CAL for instructions on
enabling it.
• KDVR3 voice recorder: set KDVR3 to NOR.
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