8
6-1-5 Frequency tuning with the secondary spectrum window
Allows to fine-tune the filter passband in 3 modes: PBT, NOTCH and AMREJ.
a) PBT mode (Passband tuning)
Centers the carrier frequency you have double clicked on
the secondary spectrum.
Press the left mouse button while dragging left or right
does retune the center frequency.
Adjust the filter bandwidth with the mouse scroll. (30 Hz to
225 kHz, IF mode and BW dependent.)
Drag either filter edge. Hover with the mouse over the
filter edge until a horizontal double arrow appears, then
drag the filter edge while left-clicking.
Clicking on the white arrows does increase/decrease the
frequency by the value set in WHEEL STEP.
Shift the entire filter by dragging it left or right, while
pressing the right mouse button. This is an actual software emulation, therefore the received frequency and the
frequency on the frequency panel do not change. Convenient for co-channel interference removal.
b) Notch mode (not active in WFM mode)
The notch function is effective for cycle noise on the
receive signal.
To activate it, double click the offending signal on the
spectrum.
Attenuation is tunable using the mouse wheel.
Filter signal can be dragged with the left mouse button.
The notch function is also accessible in the PBT mode, by
pressing the CTRL key.
Deactivate the notch by right clicking on it.
The vertical yellow bar does mark the place where the
notch has been applied. The frequency is displayed at the
top of the bar (5.00 kHz in this example)
c) ANotch (auto-notch) mode (not active in WFM mode)
Automatically detects cycle noise and applies a notch on it. The slider with “Slow” to “Fast” markings determines the
speed at which the notch is applied.
d) CWPeak filter
This is an adaptive filter for CW signals. It only works if there is a carrier. The slider with “Slow” to “Fast” markings
determines the speed at which the filter adaptation takes place.
Summary of Contents for AR-IQ-III
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