Optonica ST-105H

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