FLEX-6000 Signature Series - SmartSDR for Windows Software User’s Guide
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Copyright 2018 FlexRadio Systems. All Rights Reserved.
Tune Step Size: The amount of frequency change caused by one tuning action on the FlexControl,
mouse scroll wheel or by dragging is determined by the active slice Tune Step Size. Tune Step Size is
mode group specific and can be set by the user using the Step Size adjustment on the active slice
Widget. The FlexControl utilizes an accelerated tuning feature that will tune larger frequency steps
when the knob is rotated more quickly.
10.3 MAKING A SLICE RECEIVER ACTIVE
A Slice Receiver consists of a center Carrier Frequency displayed by a solid yellow or red
vertical bar. A yellow bar indicates the slice is “Active,” indicating that this is the slice that you are
currently manipulating. An active slice will have the focus of tuning devices such as the mouse wheel
and the FlexControl. You can toggle the active slice by clicking anywhere on an available slice’s filter
display. When a new Slice Receiver is selected as the active slice, the old active slice will become
inactive and its carrier line will change to the red color. There can only be one active slice under
tuning device control at a time in SmartSDR.
10.4 HOW TO CHANGE THE DEMODULATION MODE
The Mode Menu button on the Slice Flag displays the mode that
is currently selected. Inside the menu there is a mode drop down
menu and three quick-select modes. To change the quick-select
modes to a different mode, use a right click to expose a drop-
down menu of available modes. Beneath the mode select buttons
are the mode specific Filter Presets.
The position of the Receive Filter relative to the Carrier Frequency will correspond to the conventions
of the current mode. A Receive Filter to the right of the Carrier indicates Upper Sideband mode. A
Receive Filter to the left indicates Lower Sideband mode. A Receive Filter that spans both the left and
right of the Carrier will indicate a double sideband mode.
10.5 HOW TO ADJUST THE SPEAKER AND HEADPHONE VOLUME OF A SLICE
RECEIVER
Clicking on the slice Audio menu button will expose the slice specific audio controls. Right clicking on
the slice Audio menu button offers a shortcut for muting or un-muting the audio without having to
enter the menu. The slice Audio Menu includes a Mute button and volume slider to adjust the
audio level of the slice, and a Left and Right balance button and slider to adjust the balance
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