Icom IC-7600, Инструкция по эксплуатации, Страница: 89 / 196

80
4
RECEIVE AND TRANSMIT
4
■
Preamplifier
The preamp amplifies received signals in the receiver
front end, to improve the S/N ratio and sensitivity.
Set this to preamp 1 or preamp 2 when receiving
weak signals.
➥
Push
[P.AMP] (MF3) several times to set the
preamp OFF, preamp 1 ON or preamp 2 ON.
➥
Hold down
[P.AMP] (MF3) for 1 second to turn the
preamp function OFF.
For all HF and 50 MHz bands
High-gain preamp for 24 MHz band
and above (Available for all HF and
50 MHz bands)
About the “P.AMP2”
✓
The “P.AMP 2” is a high gain receive amplifier. When
the “P.AMP 2” is used in the presence of strong
electromagnetic fields, distortion sometimes results.
In such cases, use the transceiver with the “P.AMP 1”
or “P.AMP OFF” setting.
The “P.AMP 2” is most effective when:
• Used on bands above 24 MHz and when signals are
weak.
• Receive sensitivity is insufficient when using
low-gain antennas, or while using a narrow band
antenna (such as small loop, a Beverage antenna or
a short Yagi antenna).
■
Attenuator
The attenuator prevents a desired signal from
being distorted when very strong signals are
near the desired frequency or when very strong
electromagnetic fields, such as from broadcast
stations near your location.
➥
Push [ATT] (MF4) several times to set the
attenuator 6 dB, 12 dB, 18 dB or attenuator OFF.
➥
Hold down [ATT] (MF4) for 1 second to turn the
attenuator function OFF.
6 dB attenuation
12 dB attenuation
18 dB attenuation
P.AMP
ATT