Elecraft KX3 Owner's Manual - Manual (Page 20)

20
Audio Effects
If you have stereo headphones or stereo external
speakers, you can take advantage of the KX3’s DSP
audio effects (AFX). These create an illusion of
greater acoustic “space,” resulting in a less-
fatiguing receiver sound and in some cases better
copy of weak signals.
MENU:AFX MD is used to select the desired AFX
setting. Available selections include
O FF , D E LA Y
(simulated stereo), and P ITC H (which “maps”
signals from left to right according to pitch).
Dual Watch
Dual watch allows you to listen to both VFO A and
VFO B frequencies at the same time, as if you had
two receivers.
The use of stereo headphones or external
speakers is required with dual watch. You’ll hear
VFO A’s signal in the left ear, and VFO B’s in the
right.
Dual watch has various uses. For example, you
might be waiting for one station at VFO B’s
frequency to complete a QSO, while using VFO A
to look for other stations. You can tap
A / B to
alternate between the two. Dual watch is also ideal
for working DX stations who are listening at some
offset from their transmit frequency. You can listen
to the DX station on VFO B, then use VFO A to
listen for a clear spot in which to transmit.
To turn on dual watch: Set MENU:DUAL RX to
A U T O . This turns on the S U B (“sub receiver”)
icon. If you turn dual watch on/off frequently, you
may wish to assign it to
P F 1 or P F 2 (see pg. 19).
Dual Watch Limitations:
§ The distance between VFOs is limited to 15
kHz. If you exceed this with DUAL RX set to
A U T O , the S U B flashes slowly as a reminder.
§ A wider roofing filter than normal will be
selected automatically, if required, based on the
frequency span between VFO A and B.
§ Dual watch overrides the normal audio effects
mode (AFX MD).
§ Headphones or external speakers must be used.
Receive Audio Equalization (RX EQ)
The KX3 provides 8 bands of receive audio
equalization via the RX EQ menu entry. RX EQ
can compensate for physical acoustics (of the room,
headphones, internal speaker, external speaker),
tailoring the audio to your personal preference.
Two receive EQ setups are provided: one for CW
mode, and the other for all voice modes. RX EQ
does not apply to DATA modes.
In the RX EQ menu entry, the VFO A display
shows 8 individual vertical bar graphs. The example
below shows various amounts of EQ for each band.
The center frequencies of the 8 audio EQ bands are
50, 100, 200, 400, 800, 1600, 2400, and 3200 Hz.
To select a band to change, tap
1 - 8 on the keypad.
For example, tapping 1 selects the 50-Hz band.
Next, rotate VFO A to specify boost or cut (+/- 16
dB). The illustration above shows the 800 Hz EQ
band (
0.80 kHz) being set to +1 dB of boost.
You can hold C L R to reset all of the RX EQ bands
to 0 dB (no cut or boost).
Transmit Audio Equalization (TX EQ)
Most microphones, including the Elecraft
MH3, will provide good audio quality with little
or no TX EQ. High settings can cause distortion.
If required, transmit audio equalization can
compensate for microphone and voice variations.
MENU:TX EQ works exactly the same as RX EQ,
and can be used during transmit. Two transmit EQ
setups are provided: one for SSB, the other for
wideband voice modes (ESSB, AM, FM). TX EQ is
not applicable to CW or DATA modes.
While adjusting TX EQ, monitor your voice using
headphones (use
M O N to set the level), or listen
to your transmitted signal on another receiver. If
you hear distortion, reduce all TX EQ bands. You
may also have excessive mic gain or compression.
AGC - S
NB
FL2
XFIL
USB
VOX
PRE
ANT 2 RIT ATU TX
A
B