ICOM 318200 Manuale Utente
55
5
FUNCTIONS FOR RECEIVE
N
The preamplifier amplifies weak signals in the receiver
front end, to improve the S/N ratio and sensitivity.
Turn this function ON when receiving weak signals.
front end, to improve the S/N ratio and sensitivity.
Turn this function ON when receiving weak signals.
±
preamp OFF, preamp 1 ON or preamp 2 ON.
s
preamp 1 or preamp 2 is ON.
s
P. AMP
Wide dynamic range preamplifier. It is
most effective for 1.8 to 21 MHz bands.
most effective for 1.8 to 21 MHz bands.
P. AMP
High-gain preamplifier. It is most effective
for 24 to 50 MHz bands.
for 24 to 50 MHz bands.
N
The attenuator prevents a desired signal from being
distorted when very strong signals are near the sig-
nal’s frequency, or when very strong electromagnetic
fields, such as from broadcast stations are near your
location.
These can both be independently set for each band.
distorted when very strong signals are near the sig-
nal’s frequency, or when very strong electromagnetic
fields, such as from broadcast stations are near your
location.
These can both be independently set for each band.
±
the Attenuator.
s
±
About the “P.AMP2” preamplifier
The preamp 2 is a high gain receive amplifier. When
it is used in the presence of strong electromagnetic
fields, distortion sometimes results. In such cases, use
either the “P.AMP 1” or “P.AMP OFF” setting.
The preamp 2 is a high gain receive amplifier. When
it is used in the presence of strong electromagnetic
fields, distortion sometimes results. In such cases, use
either the “P.AMP 1” or “P.AMP OFF” setting.
Preamp 2 is most effective when:
s
s
weak.
s
antennas, or while using a narrow band antenna.
!BOUT
Hold down
Push
Push
ATT ON
P.AMP
OFF
P.AMP
P.AMP
[P
TT]
[P
TT]