Kenwood KT-7500 Instruction Manual page 7

CONNECTING INSTRUCTIONS
AM ANTENNA SETTING
First tune in an AM station. Then, while
watching the SIGNAL meter, adjust the AM ferrite
bar antenna on the rear panel for the best signal.
Notes:
1. Because the ferrite bar antenna has directive properties,
its direction should be adjusted for best reception while
listening to a station.
2. In fringe areas or in locations surrounded by steel frame
buildings where satisfactory reception cannot be obtain¬
ed with the ferrite bar antenna, an AM outdoor antenna
should be connected to the AM terminal.
OUTPUT JACKS
VARIABLE
These jacks connect to the stereo amplifier's
TUNER or AUX input terminals. The level of
these terminals is controlled by the Output Level
knob on the front panel.
FIXED
These jacks connect to the tape deck Line
Input terminals. The signal level from the output
terminals cannot be controlled from the KT-7500;
this must be done with the tape deck input level
controls.
FM MULTIPATH JACKS
This unit is provided with FM multipath jacks
through which multipath distortion can be detected.
These jacks are connected with an oscilloscope and
the antenna is positioned at the optimum height
and in the best direction by observing the displayed
waveform until distortion can be lowered to a
minimum level, operate as follows:
1. Connect the KT-7500 FM MULTIPATH V
(vertical) and H (horizontal) output terminals
to the respective inputs on the oscilloscope.
2. Tune in an FM broadcast on the KT-7500;
the signal waveform will appear on the screen
of oscilloscope. Then adjust the antenna
height and direction for least multipath recep¬
tion. This will be indicated by a waveform
similar to the one on the left in the figure.
The more multipath signals enter, the more
the waveform will be distorted as shown on
the right in the figure.
Keep the AM ferrite bar antenna
away from the rear panel.
AM ANTENNA SETTING
DET. OUT JACK
The Horizontal output of the FM MULTIPATH can be used for
the purpose of the FM DETECTOR OUT. The FM detector circuit
output is made available here so that this tuner will be ready for
4-channel broadcasting developments in the future. When FM
discrete 4-channel broadcasting becomes a reality, a simple demod¬
ulator connected here will enable you to fully enjoy this coming
development.
FM DE-EMPHASIS SWITCH
Before shipment this switch has been pre-set
to the appropriate position for the delivery area.
Units for the U.S. A. and Canada are set to "75;iisec"
and other units are set to "50jjsec".
Incorrect setting will adversely affect the high
frequency range, so check the position before
operating this unit. If you are in doubt about the
preemphasis used in your area, consult your audio
dealer.
Note:
The "25,usec" position should only be selected when this
equipment is used with an auxiliary Dolby NR adaptor
to receive FM Dolby broadcasts.
KT-7500(K) 7