565 manual
September 2003
Part #74279
Printed in USA
16
28
through
34
in Figure 2-1 at the beginning
of Chapter 2. Example: to select USB,
press MODE then press button
34
(labeled
ATTN) to select USB.
Available modes are USB, LSB, UCW,
LCW, AM, FM, and FSK. UCW and LCW
are conventional CW modes, except the
operator chooses whether the BFO is above
or below the target frequency to minimize
QRM (UCW is CW on the upper sideband,
LCW is CW on the lower sideband).
(28) PREAMP
The ORION main receiver is equipped with
a 12 dB gain preamp. Push the PREAMP
button to activate. This button has no effect
on the subreceiver; a built in always-on
preamp is used for it.
(29) RF GAIN
The RF gain control is selectable
independently for each receiver. Press
RFGAIN and adjust the MULTI knob for a
value between 0 and 100%. RF gain is
used to limit receiver sensitivity to minimize
extraneous noise under large-signal
conditions.
(30) SPOT
ORION is equipped with adjustable CW
sidetone and autotracking CW offset. This
value can be adjusted in the menu system
or via the front panel.
Pressing and holding the SPOT button will
produce a tone at the value set by the
operator (default is 700 Hz). This tone can
be matched to the received tone of an on-air
CW signal to achieve zero beat. Press and
hold the SPOT button while tuning in a CW
signal. When the tones match, you are on
the proper frequency.
The SPOT value can be adjusted by
pressing and holding the SPOT button while
turning the MULTI knob. It is adjustable
from 300 to 1200 Hz. This value is also
adjustable via the menu system. See the
description for
(CW) CW MENU
in
Chapter 3.
(31) STEP
The tuning step size for each receiver is
adjustable in seven different steps, 1, 10,
100 Hz and 1, 5, 10, and 100 kHz.
Press STEP. A submenu with the seven
values will appear, use buttons
28
through
34
to select a particular value. STEP size is
adjusted per receiver depending on which of
the MAIN RX or SUB RX buttons located
between the two main tuning knob is lit.
There is also a quick step size jump feature
accessible by pressing a lit MAIN RX or
SUB RX button (see
(55) MAIN RX
and
(56)
SUB RX
).
(32) SWEEP
The main receiver on the ORION is
equipped with a real-time band sweep
display. A separate adjustment in the
menus allows for the sweep range to be
adjusted in five different increments; the
default is 72 kHz. See the description in
Chapter 3 under
RX MENU
.
Press the SWEEP button. A display of
activity will appear at the bottom of the
screen, updating several times per second.
The center of the sweep scope has “0”
above it to indicate kHz offset from center
where a signal appears. The other numbers
appearing at the top of the sweep scope to
the left and right of the “0” are the distance
in kHz from the dial frequency.
To tune to a signal seen on the spectrum
scope, turn the main tuning knob on the
main receiver towards the signal seen on
the scope. If the signal is to the left on the
screen, turn the knob counterclockwise
(downward in frequency). If the signal is
shown to the right, turn the knob clockwise
(upward in frequency).
(33) AGC
ORION has five selectable AGC settings
that can be selected independently for each
receiver. The available options are OFF,
SLOW, MED, FAST, and PROG.
