88 ELECRAFT
LCD and Bargraph Configuration
Day/Night Selection: If you're operating outdoors, use the menu
to select L C D D A Y , which turns off the LCD backlight and puts
the bargraph into high-brightness mode. Indoors or at night, use
L C D N I T E , which turns the backlight on and reduces the bargraph
brightness.
Bargraph Modes: You have a choice of O F F , D O T , or B A R for
the LED bargraph. If you select D O T , just one bargraph segment
representing the current meter level will be illuminated. If you
select B A R , all LED segments to the left of the current level will
also be illuminated, resulting in a more visible display. O F F mode
turns off the bargraph completely during receive but uses DOT
mode on transmit (see Advanced Operating Features).
Display Modes: Tapping the
D I S P L A Y switch alternates between
frequency display mode and voltage/current display mode. If you
have the KAF2 option installed (audio filter and real-time-clock), a
time/date display mode will also be available.
In frequency display mode, the LCD will show the operating
frequency, mode indicator, and any annunciators that are enabled,
e.g. 2 4 9 4 5 . 0 4 c . This is the display you’ll use most often.
In voltage/current display mode, the LCD will show supply voltage
(E) in 0.1 V increments and supply current (I) in 0.02 A
increments, e.g. E 1 3 . 8 i 1 . 4 0 . Voltage/current display is useful for
monitoring battery condition and transmitter performance. It can
also be used in conjunction with a simple voltage probe to check
DC voltages inside the K2. A two-position jumper on the Control
board, P7, selects either 12 V monitoring or the voltage probe
(P5). If the voltage/current display shows 0 . 0 volts, it is likely that
you have P7 in the probe position.
In time/date display mode, the LCD will show either time (e.g.
0 8 . 0 5 . 0 0 ) or date (e.g. 1 1 - 2 8 - 0 2 ). You can toggle between time
and date by holding
B A N D + and B A N D - together. Refer to the
KAF2 manual for details on setting the time and date.
Frequency and Band Selection
The basic K2 kit covers the 80 through 10 meter bands. 160 meter
coverage can be added with the K160RX option, and 60 meters
with the K60XV. You can tune well above and below the ham
bands.
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Transverter Bands: The K2 provides up to three programmable
transverter band displays for use with external transverters. Refer
to the T R N x menu entry (page 102).
Transmit Limits: Some countries require transmit to be disabled
outside of specified amateur bands. If you key the transmitter with
the VFO set outside fixed limits, you’ll see E n d on the LCD.
You can change bands in one of three ways:
• tap
B A N D + or B A N D -
• hold R C L (memory recall); see below
• use Direct Frequency Entry (described later)
Whenever you change bands or recall a frequency memory, a
number of parameters are saved in nonvolatile memory
(EEPROM). This update also occurs periodically if you’ve moved
the VFO (see Backup Timer). The parameters that are saved on a
per-band basis include:
• A and B VFO frequencies and VFO tuning rate
• Current VFO (A or B)
• Operating mode (CW, USB, LSB) and CW Normal/reverse
• AGC slow/fast
• Preamp and attenuator on/off
• Noise blanker on/off (requires noise blanker option)
• ANT1/2 selection (ATU option)
• Receive antenna on/off (160 m/RX ant. option))
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The receiver is not intended to be general coverage; narrow band-pass filters
are used at the front end to reject out-of-band signals. If you attempt to tune
too far outside an available band, receiver sensitivity and transmit power will
greatly decrease, and at some point the synthesizer will lose lock.
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