Pioneer tx 8500 mk2 owners manual

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AM/FM STEREO TUNER

TX-BEDDII

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MOISTURE.

7 OPERATING INSTRUCTIONEW W_

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WARNING: TO PREVENT FIRE OR SHOCK HAZARD,
,, DO NOT EXPOSE THIS APPLIANCE TO RAIN OR

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FEATURES

Full Performance FM Front End

The 1st stage RF amplilier from end includes a 43am;
variable capacitor and high gain low noise dual gate MOS
FET circuit. In addition to advanced spurious, image and
other types of interfering signal reiection capability, high
sensitivity and excellent strong signal input response are
obtained. A wide air spaced variable capacitor is also
employed in the local oscillator circuit lor increasing tuning
scale accuracy.

Selectable Bandwidth IF Amplifier

According to signal conditions, the II amplifier can be
selected for wide band (high fidelity] and narrow band
(high selectivity) modes. A 2 element phase linear ceramic
filler is used in the wide band mode, improving phase re-
sponse to allow FM reception with excellent linearity and
fidelity. The narrow band mode utilizes 4 dual element
ceramic filters to ohmin an effective selectivity of 80dB.
interference-free reception becomes possible even in
locations where a strong interfering signal is adjacent to a
desired station.

Automatic Pilot Signal Cancelling Circuit

tarlier multiplex circuit designs employed I9kHz pilot
signal blocking filters and thus exhibited a hint oi reduction
in frequency response at the high end ol the band. This
drawback is overcome by a newly developed ILL IC which
includes an automatic pilot signal cancelling circuit. Since
carrier leakage can also be amply suppressed, the new
device actually extends frequency response at high 1er
quencies. 'lhe demodulator includes a negative feedback
(NFB) circuit for improved SN ratio and minimum distor
tion.

Built-in Rec Level Check Oscillator

Proper tape deck recording level settings and correct
antenna direction are important factors in producing
quality recordings of FM broadcasts. The built-in reference
signal oscillator provides at 440Hz toneburst signal at a level
corresponding to 50% FM modulation for use as a recording
level check signal. In addition to Use when recording of FM
programs, this feature is also valuable for balancing the
stereo channels of the listening room equipment.

AM Tuner Includes Newly Developed IC

Tuned type AM RF amplifier circuit incorporates a newly
developed high sensitivity, low distortion IC and 2-gang
variable capacitor. These contribute to advanced imaging
and RF interference reiection capabilities. Since optimum
AGC voltage is supplied to each section, stable reception
can he obtained with low spurious interference and distor~
tion even in high field strength areas.

AF IC Includes Built-in Muting Circuit

lull MB is applied in the wide dynamic range differential
direct coupled audio frequency amplifier circuit, while the
muting circuit incorporates the most recent electronic
circuit technology. By including both these circuits in a
newly developed IC, low distortion and high SIN are
reali7ed which approach the values associated with test
instrumentation. Smooth. noise-free reception is thus
assured.

Features ............................ 2
Installation Cautions .................. 3
Connection Diagram ................... 3
Connections ......................... 4
Antenna Connections .................. 4
Front Panel Facilities .................. 6

CONTENTS

Listening to Broadcasts ................ 6
Effective Operation ................... 8
IM-Dolby Reception .................. 10
Specifications ........................ l 1

Conditions Frequently Mistaken for
Malfunction ...................... 12