Luxman t 12 brochure

Page 1

Laboratory Standard Series

Page 2

Acct: touch System:

The T12 employs an eocutouch system to
seize the exact tuning point even including that oi
the RF amp stage. In this system. the accurate
center tuning point is detected by means oi a
control voltage at thequartz circuit. which activates
a mechanical lock function. As the tuning knob is
gradually turned to locate the FM station, a
positive lock occurs lor about 1 second at the
exact tunein point inclusive oi the RF stage.

Generally speaking, a quartz-locked FM tuner
has the advantage at oilering very stable reception
against ambient fluctuation such as temperature,
etc. But this system Iunctions to control only the
local oscillator, and does not extend to the RF
stage. Moreover, depending on the method at
tuning operation, tuning error is triggered at a max.
IOOkI-Iz. so that various characteristics are de-
teriorated (such as distortion, separation. rejection
etc.) In other words, only our "accutouch" makes
it possible to make the most of the Quartz lock
system to prevent possible tuning error. When the
power is turned oil with the Quartz Lock on. the
proper receiving condition is automatically obtained
the next time power is turned on.

IF Bandwidth Selector:

In the IF stage a 2-step bandwidth selector is
provided. In the "wide" position, 2 pairs 0' LC
block filter are combined provi g exceptionally
good phase characteristics, and realizing ultra low
distortion. Conversely in the "narrow" position,
a combination oi block and ceramic litters achieves
high selectivity.

The lF filters adopted here have excellent
group-delay characteristics. however. to make the
ultra low distortion tuner perfect, even small
deviation oi the components used should be
controlled. Therelore to solve this, a phase com-
pensation circuit is provided in the IF stage. and
the units are checked one by one to realize ex-
cellent distortion characteristics.

Sonic Excellence:

In the front end an exclusive FM 59mg
variable capacitor is used to make the most of [hit
various superb characteristics in the IF and ioliow-
ing stages. Also high selectivity in each RF amp
circuit ensures setislactory interlerence reiwtion.

In the detector circuit, a new quadrature IC
and a special detector translormer are adopted to
realize a low distortion characteristic through wide

bandwidth and high signal-te-noise ratio. Distortion
at the detector stage has been suppressed down to
a level below that of most test equipment. Thus no
more than 0.02% distortion is realized (or a
deviation oi 150kHz. or no more than 0.05% even
through thOkHz.

A pilot signal cancellor circuit is arranged in the
multiplex stage to improve frequency response and
phase characteristics.

Recording Test Tone Switch
Multlpath Check Switch
Signal Strength Indicator

Mutinn 0" Switch
Quartz Lock Release Switch

Center Tune Indicator

Dial Scale
Monaural Switch

IF Bandwidth Selector Switch

I!
Stereo Indicator
Dial Pointer
Tuning Lock Release Switch
Tuning Knob

Power Switch

T-IZ SPECIFICATIONS

Receiving Frequency:

87.5MH2 - 108MHz

sous Ouieting Sensitivity: seist'sndai (3.3 vi
75uS 14.2dei (zany)

me Usable Sensitivity: "iosider (new)

80dB

Signal-to-Noiso Ratio:
Frequency Response:
Total Harmonic Distortion}

0.05% (wide. iOOHz. mono)
0.05% (wide, 1kHz. monoi
0.07% (wide, BkHz, mono)

0.07% (wide. 100Hz. stereo)
0.06% (wide, IkHz. stereo)
0.1% (wide, ekHz. stereo)

0.2% (narrow. 1kHz. mono) 0.5% (narrow, (kHz, stereo)

éapture Ratio:
Adjacent Channel Selectivity:

0.8dB (wide). 2dB

:2aa (narrow 220016: I

In

ow)

Alternate Channel Selectivity:

soda tannin. tSOOKHz). sous (narrow, idOOkI-Iz)

JOdB (wide. t400kHz)

Spurious Response Ratio: .. V '16de
IF Response Ratio: IOOdB
Image Response Ratio: IOOdB
71M Suppression Ratio: 62418

Stereo Separation:

45GB (wide. 100Hzi
45dB (wide, IOkHz)

50dB (wide. 1I 3063 (narrow, lid-I2)

Output Voltage: 1V (fix)

0V - 1V (variable)

Output Impadanca' 100 ohms (fix)

100 ohms - 1.25k ohms (variablol

MutiFrhwEwld

variable IOuV - SOOMV

Tuning Lock System, IF Bandwidth Selector, Multipeth Check Switch,
Recording Test Tone Circuit, Canter Indicator. Signal Strength Indicator,
FM Muting Switch. FM Mutiny Level Control, Time Delay Muting Circuit.
Output Level Control etc.
20W

Tasalwi x 322(DI x 78(HImrn (17:11 "at-1241116"): 3-1/1§i '

Net 7.0kgs (15.4 rasii Gross emitter lbs.)

Additional Features:

Power Consumption: .. H- .
Bikmensions. '
Weight:

Specifications and appearance design are subject to possible change without notice.

LUX CORPORATION, JAPAN.

Brit-I64) n my."

ii IZH

:53?