SPLIT and Cross-Mode Operation
Normally, VFO A is used for both receive and
transmit. When SPLIT mode is selected, VFO B
becomes the transmit VFO. In this case the SPLT
icon turns on, the TX arrow points to B (pg. 12)
and the yellow delta-F LED (∆ f) turns on if receive
and transmit frequencies or modes differ.
Cross-mode operation is possible in some cases,
such as SSB/CW. You can use BSET to directly
change the mode of VFO B (pg. 24).
You can transmit in CW when SSB mode is
selected by just 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 CONFIG:CW WGHT.
Extended Single Sideband (ESSB)
An increase in SSB voice bandwidth may improve
fidelity and reduce listening fatigue.
The normal SSB receive bandwidth is about 2.7-2.8
kHz. If you have a 6 or 13 kHz filter installed, you
can use WIDTH to select a wider passband.
ESSB transmit is set up as follows:
• A 6- or 13-kHz filter on the RF board is
required. Specify which of these filters to use
for AM transmit by switching to AM mode,
then using FLTX AM).
• Switch back to SSB mode. Locate
CONFIG:TX ESSB, tap 1 to turn ESSB on,
and use VFO A to select the desired transmit
bandwidth. The + icon will turn on in the mode
area of the LCD. See cautions below.
• ESSB, AM and FM have separate TX EQ from
regular SSB, allowing you to optimize the
transmit passband for these wider-bandwidth
modes. See MAIN:TX EQ.
• Assign TX ESSB to a programmable function
switch if you’ll be turning it on/off frequently.
Carrier and spurious signal suppression,
passband shape, delay characteristics, fidelity,
and other aspects of ESSB performance are not
specified. Use ESSB only after carefully
monitoring your signal.
General-Coverage Receive
The KBPF3A option includes band-pass filters that
cover the areas between ham bands. The K3S will
switch between its narrow ham-band filters and the
KBPF3A filters as you tune the VFOs.
A KBPF3A module can be installed on the RF
board (main receiver) and/or KRX3A (sub).
CONFIG:VFO CRS selects COARSE VFO tuning
rate in each mode. AM coarse tuning rates include
5, 9, and 10 kHz.
Sensitivity below 1.8 MHz will be reduced due
to the high-pass response of the T-R switch, which
protects the PIN diodes. To avoid this loss, you can
connect your antenna to RX ANT IN (pg. 41).
VFO B Alternate Displays
The VFO B display can show time, date, RIT/XIT
offset, supply voltage, current drain, KPA3A heat
sink temperature (PA), and front panel temperature
(FP). Tap DISP to turn the selected display on or
off. Rotate VFO B to select the desired display.
If CONFIG:TECH MD is ON, additional VFO B
displays are available. SYN1 and SYN2 show the
main and sub synthesizer status, which is normally
OK. (If you see PLL1 instead of SYN1, see
Troubleshooting.) SYN2 status should be OK if a
2nd synthesizer (for the sub RX) is installed. AFV
shows the true RMS value of receiver AF output
(mVp-p), unaffected by AF GAIN control. After the
AFV reading stabilizes, you can use VFO B to
select dBV, which is useful for signal strength
measurements. Also see CONFIG:AFV TIM.
AFV and dBV apply to the sub receiver if it is
turned on. In this case, you may want to select
diversity mode (pg. 40) so you can tune the sub
receiver’s frequency with VFO A.
Alarm and Auto Power-On
Once you’ve set the real-time clock
(CONFIG:TIME), you can use MAIN:ALARM to
set an alarm. This can be used to remind you of a
schedule or net, or to start warming up for a contest.
When an alarm is set, (*) appears in the time
display. (Time can be displayed by tapping DISP.)
The K3S will turn ON automatically if it was
off at alarm time. It will be on the last-used band.
To Next Page
Loading...
