Fm Antenna Connections - Pioneer SX-400L Operating Instructions Manual

ANTENNA AND GROUND CONNECTIONS
If the reception is poor even with the accessory T-type
antenna, the signals reaching the area where you live are too
weak, Install an outdoor antenna.
FM ANTENNA CONNECTIONS
There are two methods you can use when connecting the
FM antenna to the antenna input terminals: you can use
a 300-ohm twinlead feeder or a 75-ohm coaxial cable.
Pioneer recommends the 75-ohm coaxial cable (RG59U,
etc.) if you want your receiver to display its capabilities to
the full. The coaxial cable is more effective than the twin-
lead feeder in safeguarding against external interference
noise from impairing the sound quality. In other words,
twinlead feeders are liable to pick up external noise, and
this is why they are not recommended.
Connections using a 75-ohm coaxial cable
Refer to Fig. 1 and follow the procedure. Prepare the tip
of the coaxial cable and connect it to the antenna input
terminals (75Q-UNBAL).
Connecting the 75-ohm
coaxial cable
FM outdoor antenna
Core (+) Shield
Unit: mm (GND)
=F Fig. 1
Connections using a 300-ohm twinlead feeder
In cases where it is only possible to use a twinlead feeder
with a community receiving system antenna, refer to Fig. 2
and follow the procedure. Prepare the ends of the twinlead
feeder and attach them to the 300Q2-BAL antenna input
terminals. Then make the twinlead feeder as short as possi-
ble but do not bundle the wires or run them loose on the
floor. EM Connecting the twinlead feeder
me outdoor
> <P antenna
300-ohm feeder
ANTENNA
GND AM
2002 — 752
BAL UNBAL
l j
t inal ast LAN la
erminats ud© CS)
——
300-ohm
ig.
FM ANTENNA INSTALLATION GROUNDING
It is recommended that the unit be grounded if FM recep-
tion is accompanied by a great deal of noise or interference.
To ground, connect a thick vinyl-covered wire to the GND
terminal at one end; at the other end, wind the wire around
a metal water pipe, grounding rod or copper plate and bury
it in the ground.
NOTE:
Never connect the grounding wire to a gas pipe since there may be
an explosion if gas leaks.
AM ANTENNA
This receiver is provided with a ferrite bar antenna inside. If
reception is not satisfactory when AM programs are re-
ceived, change the direction of the receiver (and this will
change the direction of the inside bar antenna).
To achieve optimum reception, connect an AM antenna as
follows.
indoor AM antenna
Provide yourself with a vinyl-covered wire (5 ~ 6 m),
attach one end to the AM terminal and the other end to a
wall or other high location.
Outdoor AM antenna
If reception is still poor even when the indoor lead wire is
extended, stretch a viny!-covered wire outdoors as in Fig. 3.
Outdoor AM antenna
Ground lead.
Ground
"[PE" to earth
aa Fig. 3
terminal