F R O N T C O N S O L E C H A P T E R 7
Res: Returns the Shift control to the default middle position and restores the filter to the original
values (i.e. before the Shift was used).
When the display is set to Panadapter, the mouse can be used to directly adjust the selected variable
filter (Var 1 or Var 2). To do so right click with the mouse on the Panadapter display until no
cross- hairs are showing. Then click on the filter and drag it to shift the filter as a whole or click on a
band edge and drag it to adjust the filter bandwidth.
The Var 1 and Var 2 filters are saved just like the labeled filters and are mode-dependent (i.e. you can save
a different Var 1 filter for LSB mode than for AM mode). Hotkeys are available in the Setup Form-
Keyboard Tab to change the filters using the keyboard.
(8) Mode Specific Controls
This section of the front console displays key controls specific to the selected modulation mode. There are
three sets of controls: Phone, CW and Digital.
Phone Controls
The phone controls, shown below, are available for all phone modes (LSB, USB, DSB, FMN, AM and
SAM). Most of these controls can also be found on the Setup Form-Transmit Tab (see next chapter, where
you can also find a more detailed description).
Figure 35: Mode Specific Controls - Phone
Mic Gain: adjusts the software microphone gain. This is a simple multiplier applied to the input
samples when in transmitting. The control can be adjusted using either the slider or the textbox. This
control is helpful for sound cards without mic preamps such as the Delta-44. Note that increasing
the MIC Gain control will also raise the amount of noise in the signal. A hardware preamp will give
the best performance for amplifying microphone signals. Having said that, the software gain works
very well in many setups. Voice modes are typically optimized when the peak reading on the TX
Mic Meter reads just below 0dB (see above)
COMP: click to enable the feed forward compression and adjust its level with either the slider or
the textbox. See also the Setup Form-Transmit Tab.
47 FlexRadio Systems
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