Bedienungsanleitung Yaesu FT-991 (Seite 15 von 154) (Englisch)

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T-991

OperaTing Manual

before You beGin

connection oF AntennA And poWer cAbleS

Please follow the outline in the illustration regarding the proper connection of antenna coaxial cables, as well as the DC

power cable. The DC power connector for the

FT-991

must only be connected to a DC source providing 13.8 Volts DC (±15

%), and capable of at least 23 Amperes of current. Always observe proper polarity when making DC connection:

The RED DC power lead connects to the Positive (+) DC terminal.

The BLACK DC power lead connects to the Negative (–) DC terminal.

We recommend the use of the

FP-1030A

(USA market only) AC Power Supply. Other models of power supplies may

be used with the

FT-991

, but the 13.8 VDC input voltage, 23 Ampere current capability, and DC cable polarity guide-

lines described above must be strictly followed.

Note that other manufacturers may use the same type of DC power connections as the

FT-991

transceiver; however, the

wiring conguration may be different from that specied for the

FT-991

transceiver. Serious damage can be caused if

improper DC connections are made; consult with a qualied service technician when in doubt.

High RF voltage is present in the TX RF section of the transceiver while transmitting.

Absolutely! Do not touch the TX RF section while transmitting.

Permanent damage can result when improper supply voltage, or reverse-polarity voltage, is applied to the

FT-

991

. The Limited Warranty on this transceiver does not cover damage caused by application of AC voltage, re-

verse polarity DC, or DC voltage outside the specied range of 13.8 V ±15 %. When replacing fuses, be certain

to use a fuse of the proper rating. The

FT-991

requires a 25 Amp blade fuse.

note:



Do not place the

FT-991

in a location with direct exposure to sunshine.



Do not place the

FT-991

in a location exposed to dust and/or high humidity.



Ensure adequate ventilation around the

FT-991

, to prevent heat build-up and possible reduction of performance due

to high heat.



Do not install the

FT-991

on an unstable desk or table. Do not place it in a location where objects may fall onto it

from above.



To minimize the possibility of interference to home entertainment devices, take all precautionary steps including

separation of TV/FM antennas from Amateur transmitting antennas to the greatest extent possible, and keep trans-

mitting coaxial cables separated from cables connected to home entertainment devices.



Ensure that the DC power cord is not subject to undue stress or bending, which could damage the cable or cause it to

be accidentally unplugged from the rear panel

DC IN

jack.



Be certain to install your transmitting antenna(s) so they cannot possibly come in contact with TV/FM radio or other

antennas, or with power or telephone lines.

Check the DC volt-

age and current

rating (+13.8 V, 23 A) of the

power supply before con-

necting to the transceiver.

To prevent damage from

lightning, atmospheric elec-

tricity, electrical shock etc., please

provide a good earth ground.

Use a short,

thick, braided

cable to con-

nect your station

equipment to the

buried ground rod (or alternative earth

ground system).

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Yaesu FT-991 Seite 15

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