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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





Rotel RT-2000

 ROTEL RT-2000 Stereo Quartz PLL AM/FM Tuner
Top performance with a quartz lock system and ideal ease of operation that complements an abundance of information.
In addition to its quartz lock system, the RT-2000 has a front-end with a 5-gang dual-gate MOS FET that guarantees reception sensitivity, and an FM PLL MPX section for superior stereo separation and a wide dynamic range. This model stands on its own in performance and quality.


QUARTZ LOCK
As obvious as it may seem, a tuner's true worth is determined by the accuracy of its tuning. Both of Rotel's 2000 series tuners ensure absolute precision by using a quartz crystal oscillator lock system.
Rotel's quartz lock system automatically compares the precise 10,7 MHz emaneting from the oscillator with the approximate 10,7 MHz of the intermediate frequency (IF). Should there be a discrepancy a positive or negative signal is accordingly emitted by the phase comparator which passes through the low pass filter (LPF) and serves to lock the local oscillator.
Touching the tuning knob unlocks the quartz control. Releasing one's hand from the tuning knob automatically activates the quartz lock circuit which then maintains the station selected. Once tuned stable reception is quaranteed and drift is eliminated regardless of changes oscillation is locked.

FM FRONT END, IF SECTION
Rotel uses a linear-frequency precision 5 gang variable capacitors. The RT-2000 has a 1 Dual-Gate MOS FET stages, both employing the best low-noise components, with resultant superior interference reiection capability as well as having a positive effect on cross modulation interference. The intermediate frequency band is divided into 2 stages, WIDE and NARROW, which ensures superior sound quality under varying conditions of reception, and the linear phase filter aids in low distortion and superior stereo separation.
 AM SECTION
The RT-2000's AM-front -end uses a 16-pin dual-in-line IC package with great resistance to external interference as well as much improved performance. Advanced circuitry means AM broadcasts also become a source for high fidelity sound reproduction.

MULTIPATH INTERFERENCE SUPPRESSION
The multipath phenomenon in FM reception, similar to double images on television , can adversely affect sound fidelity. With the Multipath switch "ON" it is possible to select the optimum position for an antenna. The degree of multipath interference can be checked with the signal meter indicator.

SUPERIOR MPX SECTION
In order to improve frequency characteristics in the MPX section, Rotel has paid particular attention to the cut off of the pilot signal (19 kHz) and weakening of the carrier signal (38 kHz). By using LC block filters, high frequency range drop is minimized and a wide range is guaranteed, with the result that rich sound reproduction is possible. The PLL  IC is employed to assure constant high stereo separation at low distortion for wide dynamic range.

IF BAND SELECTOR
IF (Intermediate Frequency) is the front end output (unified at 10,7 MHz for FM) resulting from the difference between the broadcasting signal received and the oscillator frequency. Rotel makes it possible to select between two options Wide  or Narrow. When reception is weak, use of a narrow IF band can result in superior selection.

DOLBY FM
The RT-2000 incorporates a 25µs de-emphasis switch, in case of a use with an external Dolby NR adapter.

HI BLEND SWITCH
Rotel's Hi-Blend switch creates a faithful and easy-to-listen-to reproduction by cutting out unwanted high frequencynoise with minimum loss for stereo separation and frequency response.
SPECIFICATIONS  ROTEL RT-2000
FM Section:  88 - 108 MHz
Aalternate Channel Selectivity (IHF):  80 dB (narrow)
Frequency Response:  30 Hz - 15 kHz  ±0.2 dB
Stereo separation:  45 dB (1 kHz)
Capture ratio:  1 dB
Image Response Rejection:  100 dB
IF Rejection:  100 dB
Sensitivity (IHF): 
Stereo : 36 dBf/35 µV  (S/N 50dB)
Mono:  9.8 dBf/1.6 µV  (S/N 26dB)
Signal-to-Noise  Ratio (IHF):
Stereo : 75 dB
Mono : 80 dB
Total Harmonic Distortion (wide/narrow):
Stereo : 0,07% / 0.2%
Mono : 0,05% / 0.15%
Muting Threshold:  5 µV
Am Suppresion Ratio:  60 dB
Am Section:  525 - 1605 kHz
Sensitivity (IHF):  200 µV/m
Signal-to-Noise Ratio:  55 dB
Image Rejection:  50 dB
Selectiviy:  40 dB
Dimensions (W x H x D):  482 x 143 x 328 mm

Weight:  7,5 kg
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