Yaesu FTDX-9000MP, Руководство по эксплуатации

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Page 12 FT
DX
9000MP O
PERATION
M
ANUAL
IIIII
NST NST
NST NST
NSTALLA ALLA
ALLA ALLA
ALLATION TION
TION TION
TION AND AND
AND AND
AND
I I I I I
NTER NTER
NTER NTER
NTERCONNECTIONS CONNECTIONS
CONNECTIONS CONNECTIONS
CONNECTIONS
A
NTENNA
C
ONSIDERATIONS
The FT
DX
9000MP is designed for use with any antenna system providing a 50 Ohm resistive impedance at the desired
operating frequency. While minor excursions from the 50-Ohm specification are of no consequence, the transceiver’s
Automatic Antenna Tuner may not be able to reduce the impedance mismatch to an acceptable value if the Standing Wave
Ratio (SWR) present at the Antenna jack is greater than 3:1.
Every effort should, therefore, be made to ensure that the impedance of the antenna system utilized with the FT
DX
9000MP
be as close as possible to the specified 50-Ohm value.
Any antenna to be used with the FT
DX
9000MP must, ultimately, be fed with 50 Ohm coaxial cable. Therefore, when
using a “balanced” antenna such as a dipole, remember that a balun or other matching/balancing device must be used so as
to ensure proper antenna performance.
The same precautions apply to any additional (receive-only) antennas connected to the RX ANT jack; if your receive-only
antennas do not have an impedance near 50 Ohms at the operating frequency, you may need to install an external antenna
tuner to obtain optimum performance.
A
BOUT
C
OAXIAL
C
ABLE
Use high-quality 50-Ohm coaxial cable for the lead-in to your FT
DX
9000MP transceiver. All efforts at providing an
efficient antenna system will be wasted if poor quality, lossy coaxial cable is used. This transceiver utilizes standard “M”
(“PL-259”) type connectors, except for the “RX OUT” BNC connectors used for special filters, etc.
T
YPICAL
PL-259 I
NSTALLATION
1/16"
3/4"
1 1/8"
3/4''
1/8''
5/8'' 3/8''
Adapter