566 manual
Version 4 – October 2006
Part #74410
Printed in USA
14
There are nine different settings, and each
of the nine are used to determine how
aggressively (quickly) the NR adapts and
identifies what is signal and what is noise.
Once the noise reduction value has been set
for a given signal, no further adjustment of
the noise reduction control is needed.
Turning the NR to a higher value adjusts
only how fast it adapts to a given signal vs.
noise situation.
The DSP noise reduction is adjustable
independently for each receiver, depending
on which is selected for control by the MAIN
RX and SUB RX buttons located between
the two large main tuning knobs. See
(55)
SUB RX
and
(56) MAIN RX
for information
on these buttons and their function.
Refer to the section of Chapter 4 titled
“
Optimal Uses of ORION II Receiver for
Weak-Signal DXing and Contesting
”.for
more information on using DSP NR in weak
signal environments.
(25) NOTCH
ORION II is equipped with a manual notch
filter at the IF level. Press the NOTCH
button to activate.
Both the center frequency of the notch and
the width of the notch filter are user-
adjustable.
When pressing the notch button, the center
frequency value with the
C:
annunciator will
appear. Example C: 500Hz would be a 500
Hz center frequency. The center frequency
is variable from 20 to 4080 Hz in 10, 50, or
100 Hz steps (adjustable in the menu using
the PBT/BW step size control).
While the C: value is shown, press the
NOTCH button again to change the display
to notch filter width. An annunciator marked
W: with the notch width value will be shown.
Example: W: 250Hz is a notch filter width of
250 Hz. Turn the MULTI knob to adjust the
width value.
Pressing the NOTCH button when the W:
value is shown will turn off the notch filter.
(26) AN
ORION II is equipped with an automatic
notch filter for notching out carriers in voice
modes. Multiple carriers will be notched by
the automatic filter.
To activate, press the AN button. Higher
values indicate more aggressive action by
the autonotch for suppressing undesired
carriers.
(27) MODE
Pushing the MODE button allows selection
of the various operating modes for the
transceiver. Press the MODE button to
bring up the mode selection menu.
Along the right side of the screen in
descending order will be the available mode
selections. Each mode selection will
correspond to one of the buttons numbered
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).
When selecting a mode, the last bandwidth
filter selected for that mode will be
automatically recalled for use. USB, LSB,
LCW, and UCW are all counted as separate
modes for filter recall – a filter last used in
USB will not be recalled or retained when
switching the ORION II to LSB.
(28) PREAMP
The ORION II 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.
Содержание ORION II
Страница 58: ...566 manual Version 3 March 2006 Part 74410 Printed in USA 58 Figure 5 2 Subassembly Cabling...
Страница 59: ...566 manual Version 3 March 2006 Part 74410 Printed in USA 59 Figure 5 3 Plan View of ORION Chassis...
Страница 60: ...566 manual Version 3 March 2006 Part 74410 Printed in USA 60 Figure 5 4 Main Receiver Signal Path...
Страница 61: ...566 manual Version 3 March 2006 Part 74410 Printed in USA 61 Figure 5 5 Subreceiver Signal Path...
Страница 62: ...566 manual Version 3 March 2006 Part 74410 Printed in USA 62 Figure 5 6 Transmit Signal Path...
