ELECRAFT K3, Руководство пользователя

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36
SPLIT and Cross-Mode Operation
Normally, VFO A is used for both receive and
transmit. When
S PL I T
mode is selected, VFO B
becomes the transmit VFO. In this case the
S P LT
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
B S E T
to directly
change the mode of VFO B (pg. 22).
You can transmit in CW when SSB mode is
s el ect ed by j us t hi t t i ng t he ke y or paddl e; t her e’ 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 K3’ s nor mal SSB r ecei ve bandwi dt h i s abou t
2.7-2.8 kHz. If you have a 6 kHz filter installed,
you can use
WI D TH
to select a wider passband.
ESSB transmit is set up as follows:

In
CONFIG:TX ESSB
, change the parameter
from O FF to one of the provided selections
(
3 . 5
,
4. 0
, etc.). See cautions below.

With ESSB enabled, the transmit EQ menu
entry name changes to
MAIN:TX*EQ to allow
you to independently adjust EQ at the selected
wider bandwidth. The amount of adjustment
required at each EQ band may vary depending
on the selected ESSB transmit bandwidth.

You can assign TX ESSB to a programmable
function switch, to alternate between ESSB T X
O FF and the last-selected wider bandwidth.
C arrie r and spurious signal suppression,
passband shape, delay characte ristics, fidelity,
and othe r aspe cts of ESSB pe rformance are not
spe cifie d. Use ESSB only after care fully
monitoring your signal.
General-Coverage Receive
The KBPF3 option module includes band-pass
filters that cover the areas between ham bands. T he
K3 will switch between its narrow ham-band filters
and the KBPF3 filters as you tune the VFOs.
A KBPF3 module can be installed on the RF board
(for use with the main receiver), and a second one
on the sub receiver module (KRX3).
CONFIG:VFO CRS
selects
C O AR S E
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.
VFO B Alternate Displays
The VFO B display can show time, date, RIT /XIT
offset, supply voltage, current drain, KPA3 heatsink
temperature (PA), and front panel compartment
temperature (FP). T ap
DI S P
to turn the selected
alternate display on or off. Rotate the VFO B knob
to select the desired display.
If
CONFIG:TECH MD
is O N , additional VFO B
alternate displays will be available.
P LL1
and
P LL2
show the main and sub receiver synthesizer
PLL voltages; if either is out of range, (*) will
appear.
AFV
shows the true RMS value of receiver
AF output (mVp-p). This is not affected by the AF
GAIN control. After the AFV reading has
stabilized, you can use VFO B to select
dBV
,
which is useful for comparative signal strength
measurements.
AFV and dBV both apply to the
main receiver unless the sub receiver is turned on.
Also see
CONFIG:AFV TIM .
Alarm and Auto Power-On
Once you’ ve s e t t he K3’ s r eal
-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. (T ime can be displayed by tapping
DI S P
.)
T he K3 will turn ON automatically if it was off
at alarm time. It will be on the last-used band.