19
Narrow band SDR receiver signal flow and the specific
functions that affect receiver performance.
ATT
A/D
SDR
D/A
DSP
RF
AMP
BPF
Speaker
AMP
Narrow Band SDR
Mixer
Local
Roofing
Filter
VC-Tune
Antenna
Selector
Use the VC TUNE
VC-Tune can attenuate interfering signals directly at the receiving
frequency. VC-Tune can be turned ON to attenuate the strong jam-
ming signals that cannot be removed even with the BPF. If there is
no disturbing signal, turn it OFF. Operation is performed with the
outside MPVD ring of the Main Dial.
BPF (Band Pass Filter)
BPF is selected automatically. When a frequency band is selected
on the front panel, the BPF (Band Pass Filter) for that band is auto-
matically connected to the antenna circuit.
Use the ROOFING FILTER
Roofing filters attenuate strong signals that are outside of the de-
sired passband after converting to the 9MHz IF.
The roofing filter can attenuate unwanted frequency components.
Touch [R.FIL] on the TFT screen to select the 3kHz filter for SSB,
the 1.2kHz filter or the 600Hz filter for CW. An optional 300Hz* filter
is also available.
* Included with FTDX101MP.
Use DSP interference removal functions
DSP interference removal functions include IF SHIFT, IF WIDTH, IF
NOTCH, APF, CONTOUR, and DNR.
Use these functions to adjust for comfortable reception while listen-
ing to the received audio.
To change the sound quality of the received audio, use the CON
-
TOUR function to easily improve the sound quality with high and
low frequency cut or emphasis.
Be sure to study this information to maximize
the receiver performance of the high-class
FTDX101 series shortwave transceiver.
Received signal flow
