Yaesu FT-847 handleiding
Handleiding
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FT-847 OPERATING MANUAL
IF SHIFT
The front panel’s SHIFT control tunes
the position of the IF passband rela-
tive to the frequency of the incoming
signal. This allows the operator, in ef-
fect, to sweep the current IF filter back
and forth across the desired signal,
eliminating interference from undesired signals in the
process, without changing the pitch of the incoming
signal.
The SHIFT control’s 12 o’clock (center) position rep-
resents the “normal” passband center frequency. Ro-
tate the SHIFT control to the left or right to eliminate
interference. Careful adjustment of the SHIFT con-
trol may also be useful in improving the recovered
audio on excessively bassy SSB signals. Return the
SHIFT control
to the center po-
sition to return
to the normal
default pass-
band setting.
This feature is operational in all modes except FM,
although the effect in the AM mode may not be dra-
matic due to the wider bandwidth used during AM
operation. The SHIFT control’s function is dedicated
to the receive mode, and does not affect your trans-
mitted signal characteristics; such adjustment of the
transmitted signal is, however, provided via Menu
items #92 and 93, as described on page 90.
HIGH CUT/LOW CUT CONTROLS
(
DSP
)
The DSP system’s chief interfer-
ence-fighting circuitry is the
passband tuning feature, ad-
justed via the HIGH CUT and
LOW CUT controls. These con-
trols may be used to optimize the
audio bandwidth so as to reduce
interference and noise, thus maximizing Signal-to-
Noise Ratio. The HIGH CUT and LOW CUT con-
trols are active on the SSB, AM, and FM modes.
To activate the DSP passband filter, press the [DIG.
FIL] switch; the “
DIG. FIL
” icon will appear on the
display when the DSP is on. Now rotate the HIGH
CUT and LOW CUT controls to roll off interference
and/or noise, as needed, or to enhance the audio re-
sponse. Press the [DIG. FIL] switch again to turn the
DSP passband filter off.
In the CW mode, these controls are disabled, and the
DSP bandwidth is set via Menu #10, while the center
frequency of the DSP passband filter is determined by
the setting of the “PITCH” command (Menu #6).
OPERATION
RECEIVER FEATURES
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Productinformatie
| Merk | Yaesu |
| Model | FT-847 |
| Categorie | Niet gecategoriseerd |
| Taal | Nederlands |
| Grootte | 17150 MB |
