Optonica
ST-105H
Microcomputer-Controlled
Quartz PLL Synthesizer FM/MW/LW Stereo Tuner
Optimum
reception with maximum convenience are combined innthis blend of precision
electronic systems and state-of-the-art. Component parts. Designed to eliminate
error and drift, this advanced electronic tuner employs a quartz PLL
synthesizer tuning system to ensure super-precise, super-stable reception under
all conditions. This precision is backed by an electronic input attenuator, a
dual-gate MOS FET front end, ceraamic IF filters and a quadrature detector. A
microcomputer controls both the audio search and station memory tuning systems
to provide automatic location of receivable stations and one-touch tuning of
favourite stations. A remote control station selection system, digital
frequency display and air check calibrator function facilitate optimum use of
this advanced tuner.
Specifications
FM Section
Frequency
Range: 87,5 - 108 MHz
Antenna
Input: 75 Ω unbalanced; 300 Ω balanced
Synthesizer
Tuner: yes
Span
Frequency: 0,05 MHz
Automatic
Tuning: yes
Pre-Setting
Station; FM/AM total 10
Sensitivity
:
Mono (DIN 40
kHz dev. Signal-to-Noise 26 dB): 1,3 µV
(75 Ω); 1,6 µV (300 Ω)
Stereo (DIN
40 kHz dev. Signal-to-Noise 46 dB): 39
µV (75 Ω); 45 µV (300 Ω)
Total
Harmonic Distortion (1 kHz, 40 kHz dev.):
Mono : 0,2%
Stereo
: 0,3%
Signal-to-Noise
Ratio (1mV, 40 kHz dev. 1 kHz):
Mono : 66 dB
Stereo : 61
dB
Frequency
Response: 30 Hz - 15 kHz (±3 dB)
Image
Rejection (at 98 MHz): 75 dB
IF
Rejection(at 98 MHz): 75 dB
AM
Suppression (modulated 30%, AM by 1 kHz and 100% FM by 400 Hz): 50 dB
Selectivity
(±300 kHz, 40 kHz dev.): 45 dB (normal)
Capture
Ratio: 2,5 dB (normal)
Subcarrier
Suppression: 45 dB
Stereo
Separation:
At 1 kHz
: 40 dB
At 10 kHz
: 30 dB
AM Section
Frequency
Range:
MW : 522 - 1610 kHz
LW : 150 - 372 kHz
Antenna: Built-in ferrite bar antenna; External
Antenna terminal
Synthesizer
Tuner: yes
Span
Frequency: auto 9 kHz, manual 1 kHz
Automatic
Tuning: yes
Pre-Setting
Station: FM/AM total 10
Sensitivity
MW : 350 µV/m (Signal-to-Noise 20 dB, 999 kHz)
LW : 350 µV/m (Signal-to-Noise 10 dB, 218 kHz)
Audio
Section
FM Output
(40 kHz dev.): 350 mV (fixed)
AM Output
(30% mod.): 200 mV (fixed)
General
Power
Sourece: 110/220/240 V 50/60 Hz AC
Power
Consumption: 15 W (220 V)
Dimensions
(W x H x D): 430 x 71 x 298 mm
Weight: 3,4 kg
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