About
Ooberpad announces the availability of the Accuphase T-1200 DDS FM Stereo Tuner. Utilising an amalgamation of the latest RF circuit design with functionally sophisticated digital signal processing, most major functions after the intermediate frequency stage such as the variable bandwidth IF filter, multipath reduction, digital FM demodulator and DS-DC stereo demodulation have been moved to software on the DSP chip. Manual tuning leveraging the pulse tuning method, plus 20-station memory tuning. A digital output renders further flexibility. Realizing impeccable sound quality and remarkable performance in an easy to use format, this FM tuner has been crafted for the most hard-to-please audio and music connoisseurs.
Warranty
1-year manufacturer's warrantyKey Features:
- Double-tuned front end easily handles high signal levels
- Revolutionary DDS principle for local oscillator
- Variable bandwidth IF filter prevents interference
- Multipath reduction function
- Digital FM demodulator keeps distortion and noise to a minimum
- DS-DC achieves ideal stereo demodulation with DSP technology
- MDS type D/A converter
- Memory buttons give quick access to 20 stations
Benefits of Accuphase T-1200 DDS FM Stereo Tuner:
Double-tuned front end easily handles high signal levels
The front end not only must provide selectivity for weak radio signals, it also needs to competently handle broadcast stations with strong field strength and convert the signal to the intermediate frequency (IF) while suppressing interference and distortion. The T-1200 performs these tasks brilliantly, thanks to a double-tuned circuit with excellent selectivity characteristics, placed before the RF amplification stage. This proactively prevents intermodulation distortion and blocking which can otherwise occur with strong input signals. The two-stage design with another double-tuned circuit after the RF amplifier further bolsters performance, resulting in excellent sensitivity and selectivity. The double-balanced mixer with differential input also employs a two-stage topology, forming a double super heterodyne circuit. Any type of interference signal is reliably blocked before IF conversion.
Revolutionary local oscillator principle: DDS (Direct Digital Synthesis)
The mixer combines the signal from the antenna input with the signal from a local oscillator for conversion into the intermediate frequency (IF). The local oscillator in the T-1200 is a DDS (Direct Digital Synthesis) circuit. In a conventional PLL (Phase Locked Loop) circuit, feedback is used to stabilize the frequency, but this produces frequency modulation components that tend to degrade S/N ratio. With DDS on the other hand, the output of a quartz oscillator is divided to create the digital signal timing that governs the readout of sine wave data and the operation of the D/A converter which produces the analog waveform output. Because there are no frequency modulation components, a highly pure signal with outstanding S/N ratio is created by this revolutionary circuit.
Variable bandwidth IF filter
The IF BANDWIDTH selector of the T-1200 provides a choice of six settings (50, 75, 100, 150, 250, 500 kHz). Normally, a wider bandwidth setting is preferable in terms of performance characteristics, but by restricting the bandwidth, noise can be reduced in certain situations, making it easier to obtain a good quality signal from a station affected by interference from a strong adjacent station. The variable bandwidth IF filter is implemented using a FIR (Finite Impulse Response) type digital filter with perfectly linear phase characteristics, thereby eliminating the phase shift that can occur with conventional IF bandwidth filters.
Digital FM demodulator
The FM demodulator circuit is a crucial component that has a significant effect on distortion and noise characteristics of the tuner’s audio output. In the T-1200, the imaginary part of the digitized FM signal is divided by the real part to extract the tangent of the phase angle (θ). By calculating the arctangent from this, the phase angle can be determined. Differentiation is then used to obtain the time variation of the phase angle resulting in the FM demodulated output (audio output).
Buy the Accuphase T-1200 DDS FM Stereo Tuner online at the best price in Mumbai, Delhi, Bangalore, Chennai and all across India. Enjoy expert, prompt and courteous customer service from the Ooberpad team. We will help you choose better and give you all the support you need to take the right buying decision in India.
Technical Specifications of Accuphase T-1200 DDS FM Stereo Tuner:
| Brand & Model # | Accuphase T-1200 |
| Frequency Response |
|
| Stereo Sensitivity |
|
| Antenna Input |
|
| Standing wave ratio |
|
| Tuning principle |
|
| Variable bandwidth IF filter |
|
| FM detection principle |
|
|
Digital output (IEC 60958) |
|
| Output impedance |
|
| Power requirements |
|
| Power Consumption |
|
| Maximum Dimensions |
|
| Weight |
|
Ooberpad announces the availability of the Accuphase T-1200 DDS FM Stereo Tuner. Utilising an amalgamation of the latest RF circuit design with functionally sophisticated digital signal processing, most major functions after the intermediate frequency stage such as the variable bandwidth IF filter, multipath reduction, digital FM demodulator and DS-DC stereo demodulation have been moved to software on the DSP chip. Manual tuning leveraging the pulse tuning method, plus 20-station memory tuning. A digital output renders further flexibility. Realizing impeccable sound quality and remarkable performance in an easy to use format, this FM tuner has been crafted for the most hard-to-please audio and music connoisseurs.
Warranty
1-year manufacturer's warrantyKey Features:
- Double-tuned front end easily handles high signal levels
- Revolutionary DDS principle for local oscillator
- Variable bandwidth IF filter prevents interference
- Multipath reduction function
- Digital FM demodulator keeps distortion and noise to a minimum
- DS-DC achieves ideal stereo demodulation with DSP technology
- MDS type D/A converter
- Memory buttons give quick access to 20 stations
Benefits of Accuphase T-1200 DDS FM Stereo Tuner:
Double-tuned front end easily handles high signal levels
The front end not only must provide selectivity for weak radio signals, it also needs to competently handle broadcast stations with strong field strength and convert the signal to the intermediate frequency (IF) while suppressing interference and distortion. The T-1200 performs these tasks brilliantly, thanks to a double-tuned circuit with excellent selectivity characteristics, placed before the RF amplification stage. This proactively prevents intermodulation distortion and blocking which can otherwise occur with strong input signals. The two-stage design with another double-tuned circuit after the RF amplifier further bolsters performance, resulting in excellent sensitivity and selectivity. The double-balanced mixer with differential input also employs a two-stage topology, forming a double super heterodyne circuit. Any type of interference signal is reliably blocked before IF conversion.
Revolutionary local oscillator principle: DDS (Direct Digital Synthesis)
The mixer combines the signal from the antenna input with the signal from a local oscillator for conversion into the intermediate frequency (IF). The local oscillator in the T-1200 is a DDS (Direct Digital Synthesis) circuit. In a conventional PLL (Phase Locked Loop) circuit, feedback is used to stabilize the frequency, but this produces frequency modulation components that tend to degrade S/N ratio. With DDS on the other hand, the output of a quartz oscillator is divided to create the digital signal timing that governs the readout of sine wave data and the operation of the D/A converter which produces the analog waveform output. Because there are no frequency modulation components, a highly pure signal with outstanding S/N ratio is created by this revolutionary circuit.
Variable bandwidth IF filter
The IF BANDWIDTH selector of the T-1200 provides a choice of six settings (50, 75, 100, 150, 250, 500 kHz). Normally, a wider bandwidth setting is preferable in terms of performance characteristics, but by restricting the bandwidth, noise can be reduced in certain situations, making it easier to obtain a good quality signal from a station affected by interference from a strong adjacent station. The variable bandwidth IF filter is implemented using a FIR (Finite Impulse Response) type digital filter with perfectly linear phase characteristics, thereby eliminating the phase shift that can occur with conventional IF bandwidth filters.
Digital FM demodulator
The FM demodulator circuit is a crucial component that has a significant effect on distortion and noise characteristics of the tuner’s audio output. In the T-1200, the imaginary part of the digitized FM signal is divided by the real part to extract the tangent of the phase angle (θ). By calculating the arctangent from this, the phase angle can be determined. Differentiation is then used to obtain the time variation of the phase angle resulting in the FM demodulated output (audio output).
Buy the Accuphase T-1200 DDS FM Stereo Tuner online at the best price in Mumbai, Delhi, Bangalore, Chennai and all across India. Enjoy expert, prompt and courteous customer service from the Ooberpad team. We will help you choose better and give you all the support you need to take the right buying decision in India.
Technical Specifications of Accuphase T-1200 DDS FM Stereo Tuner:
| Brand & Model # | Accuphase T-1200 |
| Frequency Response |
|
| Stereo Sensitivity |
|
| Antenna Input |
|
| Standing wave ratio |
|
| Tuning principle |
|
| Variable bandwidth IF filter |
|
| FM detection principle |
|
|
Digital output (IEC 60958) |
|
| Output impedance |
|
| Power requirements |
|
| Power Consumption |
|
| Maximum Dimensions |
|
| Weight |
|
Company Contact Information
3, Shubhanghini, 51, Milan Subway Road,
Santacruz West, Mumbai 400054
