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AR3030 operating manual
5-34 ANT SELECTION - Selection switch
This three position slide switch allows selection of aerial input.
In the left position the high impedance wire input is selected.
In the centre position a small level of amplification along with impedance
matching is applied to the BNC aerial input to permit operation from a small
high impedance telescopic whip aerial.
In the right position the 50 OHM BNC aerial socket is selected allowing
connection to low impedance coaxial aerials such as dipoles, magnetic baluns,
loop aerials (AOR LA320), coaxial fed systems (like the AOR WA7000 active
aerial) or an aerial tuning unit.
5-35 WHIP ANT / 50 OHM / LW-HF ANT socket
This is a high quality 50 OHM BNC aerial input socket. BNC is the commercial
standard and offers superior performance to the cheaper SO239 socket. Of
course inter-series adaptors are widely available so connection to almost any
aerial system should not present a problem.
5-36 VHF ANT - VHF socket
This is a 50 OHM BNC aerial input socket for use when an optional VHF
converter is fitted. Suitable aerials include telescopic whips, VHF dipoles,
groundplanes and discones.
5-37 LIGHT switch
The LCD and S-meter illumination is selectable On/Off via this switch. This
facility is particularly useful if the receiver is being operated from batteries in
order to reduce the current taken by the receiver and lengthen the operational
time.
5-38 BATT compartment
This is the battery compartment. Access is achieved by removing (and carefully
storing) the two knurled nuts. Inside the battery compartment is a cradle
designed to accept 8 x UM-3 (AA size) batteries.
The receiver has not been designed to operate for a long time
from batteries. However, depending upon the type of battery
used operation is typically 30 minutes using Manganese and
45+ minutes when using Alkaline cells.
Always remove the batteries when they have expired (run down). Should you
plan not to use the receiver for a period of time, remove the batteries to avoid
potential leakage.
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