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What is stereo?




There are now two system of high fidelity, monophonic (monaural) and stereophonic. Monophonic is a system that starts from one microphone and is fed through a single high fidelity set. Stereophonic is a double system. Two separate microphones are placed at different sides of the orchestra and two different systems are used to keep the two signals or channels separated. Two separate speakers are used, placed on different sides of you room. Stereo is much like 3-D photography, two slightly different sound reach your ears giving you a new dimension in sound.



H.H. Scott '59





SAE 3200 FM tuner

 

FM Digital Tuner

The SAE 3200 FM Digital Tuner offers the benefits of the latest circuit design while drawing upon the linear and digital technology developed for SAE's other superb FM tuner, the 8000. many of the features synonymous with SAE are present on the 3200; the precision tuning accuracy of a crystal-controlled digital readout; the low distortion and wide separation obtained with linear phase filters; the smooth, effect of side-skirt controlled muting. These features combine with others unique to 3200; precision 10-turn tuning potentiometer and varactor front-end for accurate tuning and excellent rejection of unwanted stations, direct reading LED displays for signal-strength and center-tuning. The resulting superior performance and unique simplicity of operation make the 3200 another Component for the Connoisseur.

 

Features

Electronic Front-End

This unique 4-section varactor front-end and its associated 10-turn tuning control potentiometer provides spurious response rejection of over 80 dB and IHF sensitivity of 10,3 dBf (1,8 µV)

LED Signal Strength and Center Tuning

The 5 section LED signal strength display indicates the actual signal strength received by the tuner. The 3 section LED center tuning displays center of station. When used in conjunction with the signal strength display they provide precise information necessary for proper tuning.

FM Muting

A unique side-skirt muting circuit eliminates off-channel interference and muting is "thump-free" due to stereo audio attenuators.

Antenna Inputs

Careful attention is paid to antenna termination to ensure the best signal reception possible. Inputs are provided for 300 Ω  flat lead and a special input for 75 Ω  coaxial cable.

Phase-Lock-Loop-Multiplex

This circuit is used in the reception of FM stereo, automatically locking the phase of the internal multiplex subcarrier oscillator to the incoming signal. This internal signal oscillator is not susceptible to transmission noise and has less intermodulation distortion products then the broadcasted subcarrier.

Digital Frequency Readout

Utilizing the latest LSI (Large Scale Integration) technology, four 7-segmented ruby LED's and crystal reference control the 3200 readout displays the exact station frequency, accurate to within 0,025% of the station frequency.

Linear Phase Filters

Sonically pure FM stereo requires that all signal components required for stereo must remain time aligned (in-phase). Since these components must pass through the IF filters to strip them of unwanted noise and distortion it is imperative that these filters have as little phase shift as possible. Our permanently aligned monolithic linear phase filters ensure exactly that.

 


Specifications

IHF Usable Sensitivity

Mono:  10,3 dBf (1,8 µV) at 300 Ω

50 dB Quieting

Stereo :  37,2 dBf (40 µV) at 300 Ω

Signal-to-Noise Ratio at 65 dBf

Mono :  70 dB

Stereo :  67 dB

Frequency Response:  20 Hz to 15 kHz ±0,5 dB

Total Harmonic Distortion (1 kHz)

Mono :  less than 0,15%

Stereo :  less than 0,20%

Capture ratio:  1,2 dB

Alternate Channel Selectivity:  better than 90 dB

Spurious Response Ratio:  better than 80 dB

IF Response Ratio:  better than 80 dB

AM Suppression Ratio:  better than 80 dB

Stereo Separation

At 1 kHz :  better than 42 dB

At 10 kHz :  better than 35 dB

Output:  1,5 VRMS

Dimensions (W x H x D):  483 x 133 x 89 mm (19" x 5,25" x 3,5")

Weight:  6,8 kg (15 lbs)

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