Elecraft P3 High-Performance Panadapter Manual - Manual (Page 15)

15
Programmable Functions
Most MENU functions can be assigned to any
programmable function key, FN1 to FN8. Tap or
hold the desired function key while the function is
visible on the display but not selected by tapping
the SELECT knob. The function name then
becomes the function key label which can be seen if
labels are currently displayed. To un-assign a
function key, select MENU:FN Erase and tap or
hold the function key you wish to erase.
Some menu items are much more useful when
assigned to a function key. Examples are
Peak
hold
and
Freeze
display.
PEAK assigned to Function Key FN1.
Adjusting the Amplitude
Tap
R E F L V L
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 are indicated at the top left and
right of the display. They are shown as offsets from
the center frequency in tracking mode and as the
actual RF frequencies in fixed-tune mode.
Hold
C E N T E R
to adjust the display center
frequency by turning the SELECT knob. This
function may be disabled for tracking mode via
MENU:CenterEn.
Hold
C E N T E R
again to re-center the display on the
transceiver VFO frequency.
When used with the K3, an RF frequency is shown
at the top center of the display. In tracking mode, it
is the display center frequency, which normally is
the K3 VFO A frequency. In fixed-tune mode it is
always the K3 VFO A frequency. For transceivers
other than the K3 it is the difference between the
center frequency and the current transceiver
frequency, normally zero.
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.