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Voice Mode VOX Setup
VOX selectsPTT (push-to-talk) or voice-operated
(VOX) transmit (VOX icon on).
The VOX delay can be set from 0.05 seconds (50
ms) to 2.00 seconds. The lower the setting, the
faster the K3 will return to receive mode after a
pause in speech. See D ELAY (pg 14).
The MAIN:VOX GN menu entry (VOX gain)
should be set so that the K3 enterstransmit mode
when you speak at a normal level. Setting VOX GN
too high will result in the K3 switching into
transmit mode in response to incidental noise.
MAIN:ANTIVOX adjusts VOX immunity to signals
receivedthrough the K3's speaker or headphones.
While listeningto a loud received signal, and with
the mic closer to the speakerthan it would be in
normal operation, adjust ANTIVOX upward until
the K3 doesn’t switch to transmit mode.
Digital Voice Recorder (DVR)
If you have the KDVR3 option installed, you can
record and play voice messages as well as capture
received audio.
Message Record and Playback
To start recording, tap REC , then tap any of M1 -
M4 . The remaining buffer time in seconds will be
displayed as you speak. Tap REC again to stop.
Tap M1 – M4 to play. To cancel, tap R EC . You
can also hit the keyer paddle, key, or any switch
besides M1 –M4 to cancel play.
To auto-repeat a message, Hold (ratherthan tap)
M1 –M4 . MAIN:MSG RPT setsthe message
repeat interval (1 to 255 seconds).
Receive Audio Recording
Hold AF R EC to start / stop audio record. The
icon will appear. Recording starts at the
beginning of available space each time it is started,
and will stop at the end if notterminated sooner.
Hold AF PL AY to start / stop audio playback.
During playback, the icon flashes.This
serves as a reminder that you’re hearing recorded
ratherthan live audio.
AM Operation
A 6 kHz (AM) or 13 kHz (FM) crystal filter is
required on the RF board for AMtransmit and
receive (pg. 46).
When listening to AM signals, you can hold AL T to
select envelope detection (AM) or synchronous
detection (AM-S). With envelope detection,
selective fading can notch out the AM carrier,
resulting in severe distortion. The synchronous
detector solvesthis problem by phase-locking an
oscillator to the AM carrier. Careful tuning ofthe
signal is required.
You can also listento AM using LSB or USB
modes. If you have a 6-kHz filter installed, voice as
well as music will have excellent fidelity.
FM Operation
FM mode can be disabled by setting
CONFIG:FM MODE to OFF.
An FM-bandwidth crystal filter (at FL1) is required
on the RF board for FM transmit and receive (pg.
45). The sub receiver also requires an FM filter at
FL1 for FM receive. DSP filter bandwidth is fixed
in this mode; presets and filter controls are not used.
FM defaultsto simplex (transmit and receive on the
same frequency).The following controls and menu
entries are used for repeater setup:
Holding ALT switches between simplex,TX
(+), andTX (-). This is indicated by the + and -
icons (nearthe FM icon).
Repeater offsets can be programmed on a per-
band/per-memory basis. See MAIN:RPT OFS.
Tone encode is set up by holding PI TCH .
Rotate VFO A to select a CTCSS tone
frequency (orthe European repeater access
tone, 1750 Hz). Use VFO B to turn tone encode
on (PL TONE) or off (PL OFF).
All of the settings described above are saved in
frequency memories.
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