IQ32 SDR TRANSCEIVER OPERATIONS MANUAL
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Receive Filter Settings
On the three operational screens (CW, SSB, and PSK),
to the right of the
Mode
widget and to the left of the FFT
(Waterfall or Spectrum) display, in yellow text, will be the
filter bandwidth indication, Figure 55. This indicator is
telling you which received filter bandwidth is in operation.
The filter bandwidth is also indicated graphically by the
length of the yellow line between the FFT window and
the S Meter.
The six bandwidths are selected by pressing in on the left rotary encoder and releasing it. (Do
not rotate.) Each press and release cycles you from the current filter to the next narrower filter,
until the narrowest one is reached, at which time you wrap around to the widest one all over
again. The six filter bandwidths are as follows:
•
F0 = 4,000 Hz (0
– 4000)
•
F1 = 3,300 Hz (300
– 3000)
•
F2 = 2,400 Hz (300
– 2700)
•
F3 = 1,000 Hz (300
– 1300)
•
F4 = 300 Hz (400
– 700)
•
F5 = 100 Hz (500
– 600)
As you may recall, we previously mentioned that there are on-screen buttons (on the SSB and
CW
H
OME
S
CREENS
) that allow you to select the audio bandpass. The on-screen buttons, how-
ever, only allow selection of audio bandwidths that make sense for the current operational
mode. In SSB modes, only F0, F1, or F2 are selectable with the on-screen button. In CW
modes, any of the six bandwidths, F0 through F5, can be chosen. The PSK operational
screens do not have an on-screen
Filter
button, so selection of the audio bandwidth can only
be made with the left rotary encoder.
Figure 55: Filter Selection
