Elecraft PX3 Owner's Manual - Manual (Page 16)

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Tap or hold the desired function switch while the
function is visible on the display but not selected by
tapping the
SELECT knob. The function name
then becomes the function switch label which can
be seen if labels are currently displayed.
Figure 8. PEAK assigned to Function Switch FN1.
Assigning a function to a previously-assigned key
overwrites the previous function. Optionally you
can remove any assignment from a function switch
with
MENU:FN Erase and tap or hold the function
switch you wish to erase.
Adjusting the Amplitude
Tap R E F to adjust the reference level, which is the
signal level that corresponds to the bottom of the
spectrum display and the low-signal level of the
waterfall display. Hold
S C AL E to adjust the
"vertical gain" of the display. For example if the
reference level is set to -100 dBm and the scale to
30 dB, then the top of the spectrum display is at -70
dBm and the bottom at -100 dBm.
The waterfall display is most useful if the reference
level is adjusted to place the noise level near the
bottom of the display and the scale is adjusted so
that the strongest signals of interest are near the top.
Adjusting the Frequencies Displayed
Tap S P AN to adjust the range of frequencies that
can be seen on the display at one time. The start and
stop frequencies in KHz are indicated at the top left
and right of the display. They are shown as offsets
from the center frequency.
Hold C E N T E R to adjust the display center
frequency by turning the SELECT knob. The
center frequency of the display is now offset from
the KX3’s VFO A frequency by the amount shown.
The center frequency will then track changes in the
KX3’s frequency, maintaining the same offset.
Hold C E N T E R a second time to return the center
frequency to the KX3’s VFO A frequency.
The center function may be disabled in the menu:
MENU: CenterEn . Press the SELECT knob to
toggle the function on or off.
Hold C E N T E R again to re-center the display on the
transceiver VFO frequency.
The tic marks that appear along the top and bottom
edges of the spectrum and waterfall widows
indicate RF frequency in integer multiples of 0.5, 1,
2, 5, 10 or 20 kHz, depending upon the span.
Using Markers
Tap M K R A to turn on marker A and allow you to
change the marker frequency by rotating the
SELECT knob. To determine the frequency of a
signal, move the marker so that it overlays the
carrier and read the frequency from the display. For
single sideband signals, place the marker where the
carrier would be if it were transmitted, i.e. on the
lower frequency (left) edge of an upper sideband
signal and on the upper frequency (right) edge of a
lower sideband signal.
You can QSY (change the frequency of) the KX3’s
VFO A to the marker A frequency by tapping the
SELECT knob. To return to the previous
frequency, hold the knob. To turn off marker A, tap
M K R A again.
Similarly, marker B is turned on and off with the
M K R B switch and you can change the marker
frequency with the SELECT knob. Tapping the
SELECT knob changes the KX3’s VFO B
frequency in the same way M K R A changes the
VFO A frequency
To turn off a marker you must first make it active, if
necessary, by tapping
M K R A or holding M K R B .
Then tap or hold the switch a second time to turn
off the marker.
If some other function that uses the SELECT
knob is activated, the marker stays on and
automatically becomes active again (you can adjust
it with the knob) when the other function is
terminated. The tap-to-QSY function affects VFO