Yaesu VR-5000 handleiding
Handleiding
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VR-5000 OPERATING MANUAL 11
Installation
Antennas for VHF and UHF Reception
Any antenna used for reception above 30 MHz will be fed with coaxial cable, so it must be
connected to the Antenna A jack.
The wide frequency coverage of the VR-5000 means that a wide-band vertical antenna
(such as the “Discone” type) will be required for reasonable performance on the VHF and
UHF bands. Optimized narrow-band vertical antennas will provide better performance on
a specific frequency range, at the expense of poorer performance on other frequencies.
While vertical orientation of the antenna will be compatible with the configuration of the
majority of base and mobile stations being heard, horizontally-oriented antennas are often
used by amateur radio stations using the USB and CW modes in the 50 MHz, 70 MHz
(U.K.), 144 MHz, and 432 MHz bands.
Whichever antenna(s) you use, it is important to use the best quality (lowest loss) coaxial
cable possible, as cable loss in a long length of coaxial cable can be very high if small-
diameter cable is used. This will reduce the strength of the incoming signals, making re-
ception of weaker signals difficult or impossible.
Your local dealer will be in the best position to recommend an antenna type, as well as
installation tips, for successful monitoring in your area.
Antenna Switching
Antenna switching between the coaxial Antenna-A and long-wire Antenna-B jacks (on
the rear panel of the receiver) is accomplished using the ANT A/B slide switch, located
between the two antenna jacks on the rear panel of the VR-5000. An antenna may be
connected to each jack; there is no need to remove an antenna when the alternate jack is
being used.
If multiple antennas are to be used in conjunction with the coaxial Antenna A jack, con-
sult your dealer regarding the procurement of a coaxial antenna switch suitable for the
frequency range of interest.
Important Note Regarding Antenna Safety!
Disconnect all antennas connected to the VR-5000 if you receive information that a
lightning storm is approaching your area. Extremely high voltages can be fed into
your station through an antenna system, and a receiver struck by lightning will be
permanently damaged or destroyed.
Do not, however, attempt to disconnect your antenna(s) if a lightning storm is in
progress in your immediate area. You could be killed instantly if you are handling
the antenna or its feedline at the moment lightning strikes!
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Productinformatie
| Merk | Yaesu |
| Model | VR-5000 |
| Categorie | Niet gecategoriseerd |
| Taal | Nederlands |
| Grootte | 8268 MB |
