Pioneer CT-07D Operating Instructions - Page 12

FRONT PANEL FACILITIES DIGITAL-NR The Digital-NR is a noise reduction system developed originally by PIONEER. It is an innovative system capable of reducing almost all hiss noise regardless of how the tape being played was recorded. *(This system can reduce noise based on operations during playback only.) When a tape is played by selecting Dolby NR, the Dolby NR circuit reduces hiss noise then the Digital-NR circuit eliminates residual hiss noise remaining after the Dolby processing, thereby achieving a very high S/N. Though this system has been set so that it is activated every time a tape is played, it is also possible to cancel its operation by the procedure described below. • Sufficient NR effect may not be obtained in case the level of noise recorded in the tape is higher than the hiss noise level. To cancel the Digital-NR, press the DECK I TIME/COUNT button and DECK II TIME/COUNT button simultaneously while the power is ON. (The DIGITAL indicator on the center of the front panel should turn off.) To activate the Digital-NR again, perform the same operation as above again. The Digital-NR cannot be turned ON/OFF in recording mode. Also note that the Digital-NR is always ON in the initial condition after turning the power from OFF to ON. DIGITAL FLEX SYSTEM • DIGITAL FLEX system: Frequency Level Expander system. (hereafter abbreviated to FLEX system) This system automatically compensates high and low frequency level balance above 1 kHz according to the 1/f curve during play- back. • Generally, the envelope line of sound energy distribution of Hi-Fi sounds corresponds statistically with the 1/f curve. The 1/f curve indicates that if the frequency doubles, the level de- creases by approx. Half of the original frequency level. • During playback, the FLEX system automatically compensates tapes with poor sound quality at high frequency levels of 1 kHz and over, based on the appropriate auditory characteristics. The FLEX system is designed to improve high frequency repro- duction in the10 kHz range be up to about 10 dB (max.), particu- larly in tapes with poor sound clarity and sound presence at high frequency levels. If the playback tape sound matches the 1/f curve, the FLEX system defeats compensation adjustment auto- matically. • When you press the FLEX button to turn the FLEX system on and start playback, the FLEX indicator flashes and compensation ad- justment begins. Compensation adjustment takes approximately 3-5 seconds to complete, depending on the music source. The indicator changes from a flashing to a steadily lit condition when the adjustment is completed. • When the FLEX system is engaged, each music selection is auto- matically adjusted during playback. System operation status is indicated by the FLEX indicators (flashing or steadily lit.) NOTE: When a tape has been recorded at a high frequency level above the compensation level, the FLEX system operation is automatically defeated during playback. 12 En/Fr COMMANDES DU PANNEAU AVANT DIGITAL-NR (REDUCTEUR NUMERIQUE DE BRUIT) Digital-NR est un reducteur de bruit mis au point pas PIONEER. C'est un dispositif original capable de reduire tous les sifflements quelle que soft la maniere dont la bande a eta enregistree. *(Ce dispositif ne peut recluire le bruit que pendant la lecture.) Le dispositif Digital-NR intervient lors de la lecture dune cassette apres que le circuit de reduction de bruit Dolby a agi, ce qui permet donc d'obtenir un rapport signal/bruit tres eleve. Bien que le dispositif est tel qu'il entre en fonction des que commence la lecture dune cassette, il est malgre tout possible de le mettre hors service en procedant comme il est dit ci-dessous. • Une reduction suffisante du bruit ne peut pas etre obtenue si le niveau du bruit enregistre sur la bande est superieur au niveau des sifflements.