Elecraft P3 High-Performance Panadapter Manual - Manual (Page 11)

11
Display
The 480x272-pixel, color TFT-LCD display is used
both for the panadapter spectrum and waterfall
graphics as well as for general-purpose information
needed by the operator. All graphics and text are
bit-mapped and so are software-defined. The
backlight brightness and the text size can be
changed via a
M E N U
entry (Page 33).
Primary Controls
P O W E R
Turns the P3 on or off. The P3 may be
configured to turn on automatically whenever
power is applied, such as when it is powered from a
K3 transceiver, by moving a jumper on the rear-
panel I/O board (see Configuration on page 30 for
details.) Holding the POWER switch for more than
10 seconds places the P3 in boot-load mode, ready
to receive new firmware via the RS232 PC
connector. If you do this accidentally, simply cycle
the POWER to restore normal operation.
M K R A
and
M K R B
Selecting one of these
functions causes a marker to appear on the display,
using different colors for A and B. The marker
frequency can be adjusted by turning the
SELECT
knob. If the transceiver is a K3 and it is
connected to the P3 via RS232, then tapping the
knob changes the frequency of (QSY) the K3 to that
frequency.
M K R A
controls the K3's VFO A and
M K R B
controls VFO B. The marker colors match
the corresponding VFO cursors to emphasize the
correspondence. Whichever marker is currently
selected is the one that causes the K3 to QSY. To
return from the last QSY ("undo" function), hold
the
SELECT
knob pushbutton.
To turn off
M K R A
, tap the key while marker A is
selected. To turn off
M K R B
, hold the key while
marker B is selected. When a marker is turned back
on after having been turned off, it will come back at
the same frequency unless it is off-screen, in which
case the marker defaults to the center frequency.
When another function that uses the
SELECT
knob is activated, the marker(s) stay visible and
when that other function is de-selected the last
active marker automatically becomes active again.
S P AN
Sets the frequency span of the display. The
available range is 2 kHz to 200 kHz. The start and
stop frequencies are displayed at the top (left and
right edge respectively) of the spectrum window.