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VT RTA-268A/B/C

PC based USB Ultra-Low Noise Real Time Acoustic Analyzer, Sound Level Meter, Distortion Analyzer, Polarity Tester, Time Delay Finder ...                         Manual VT RTA-268A     US$999.95     Free Express Shipping VT RTA-268B    US$999.95     Free Express Shipping VT RTA-268C     US$2199.95     Free Express Shipping VT RTA-268A/B/C comes with M215 / M215L / M50 measurement microphone, respectively.  All these microphones have an extremely flat frequency response in their rated frequency ranges.  Each M50 also comes with its unique frequency response file, which can be used in the software to further improve the accuracy. Download and try the fully functional Multi-Instrument software using your sound card as the ADC and DAC device! 1. Introduction VT RTA-268A/B/C is a series of PC-based ultra-low-noise huge-dynamic-range real-time acoustic analyzers, powered by the comprehensive virtual instrument software, Multi-Instrument®. The USB audio interface used in the analyzers has two ADCs working in tandem to create a single output data stream in 32-bit float format. One “low gain” ADC is optimized for high-level signals, and the other “high gain” ADC is optimized for low-level signals. This state-of-the-art dual-ADC architecture provides unmatchable dynamic range compared with the conventional single ADC approach. With a proper microphone, it is now possible to capture sound across the entire human hearing range without sacrificing fidelity at low signal levels or encountering clipping at high signal levels, and this can be achieved without the hassle of manual analog gain adjustment and measurement range switching at all. 2. Package Contents 1) XLR Measurement microphone and its accessories (a windshield, a microphone clip and a small microphone stand) 2) XLR-to-USB Audio Interface 3) USB cable (1 m) 4) XLR cable (1.5 m) 5) CD (contains the copy-protected Multi-Instrument Software) 6) USB hardkey (contains a Multi-Instrument Pro License) 7) Audio Test WAV files (contains a list of audio test tones and noises)  (download at AudioTestCD.zip or AudioTestCD.rar) 8) Carrying Case 9) Unique Sound Level Calibration Data (in CD) 10) Unique Microphone Calibration Data (in CD, only applicable to RTA-268C)             Unique Calibration Files Download:                    RTA-268A Mic Serial Number M215-XXXXXX                    RTA-268B Mic Serial Number M215L-XXXXXX                    RTA-268C Mic Serial Number M50-XXXXX                                  Other Customized Configuration: V210-XXXX-XXXX-XXXX                    3. Optional Items 1) An additional XLR measurement microphone and its accessories 2) P48-to-IEPE converter (so that IEPE sensors can be connected to the XLR input) 3) IEPE sensors 4) Software license upgrade 4. VT RTA-268A/B/C Hardware Configuration   RTA-268A RTA-268B RTA-268C Measurement Microphone M215 M215L M50 XLR-to-USB Audio Interface UAC-232   5. Overall VT RTA-268A/B/C Specifications     RTA-268A RTA-268B RTA-268C Frequency Range 20Hz ~ 31.5kHz 20Hz~20kHz 9Hz~50kHz Sound Level Measurement Range 20dB ~ 126dB 22dB~138dB 22dB~128dB Sampling Rate 44.1kHz, 48kHz, 88.2kHz, 96kHz, 176.4kHz, 192kHz Bit Depth 32-bit Float / 24-bit Number of Input Channels 2 Number of Output Channels 2 Frequency Accuracy 0.001% Frequency Weighting Flat, A, B, C, Z, ITU-R 468 Time Weighting Linear, Exponential (Equivalent Continuous Sound Level (Leq) fully complies with IEC61672) Sound Level Measurement Accuracy ± 0.3 dB at 94dB, 1kHz after calibration Sound Level Calibration Calibrated using Type 1 Sound Level Calibrator Octave Analysis 1/1, 1/3, 1/6, 1/12, 1/24, 1/48, 1/96 (Complies with IEC61260) Other Functions THD, THD+N, SINAD, SNR, SMPTE IMD, DIN IMD, CCIF2 IMD, Frequency Response, RT60, etc.  Much more functions are described in the software manual. USB Interface USB 2.0 USB Audio USB Audio Class 2.0 (driver installation required) Power Supply USB bus powered (5V) System Requirements Windows 10/11, 64 bit. Minimum Screen Resolution: 1024 × 600 Calibration Individually calibrated 6. UAC-232 Audio Interface Specifications   Input Impedance Max. Voltage Dynamic Range XLR Phantom Power Left (Input 1): XLR/TRS/TS(HiZ) Combo Jack XLR: 2.7 kΩ TRS: 4 kΩ / 1MΩ (when HiZ on) XLR: 2.35 Vp TRS: 23.0 Vp / 4.30 Vp (when HiZ on) XLR: 134 dB TRS: 129 dB TS(HiZ): 123dB 48V Right (Input 2): XLR/TRS Combo Jack   Output Impedance Max. Voltage Left (Output 1): TRS (balanced) Jack 100 Ω 9.0 Vp (adjustable through volume knob) Right (Output 2): TRS (balanced) Jack Headphone 12 Ω 4.4 Vp (adjustable through volume knob) MIDI IN/OUT (5-pin DIN connectors) Input Frequency Response 44.1 kHz: 20Hz~20kHz, +0.1 dB / -0.2 dB -3dB: 9Hz~21.8kHz 48 kHz: 20Hz~20kHz, ±0.21dB -3dB: 9Hz~23.8kHz 96 kHz: 20Hz~40kHz, ±0.22dB -3dB: 9Hz~47.6kHz 192 kHz: 20Hz~80kHz, +0.1 dB / -0.2 dB -3dB: 9Hz~91.8kHz TRS Output Frequency Response 44.1 kHz: 20Hz~20kHz, +0.0 dB / -0.1 dB 192 kHz: 20Hz~80kHz, +0.0 dB / -1.0 dB Headphone Output Frequency Response 44.1 kHz: 20Hz~20kHz, +0.0 dB / -0.5 dB 192 kHz: 20Hz~80kHz, +0.0 dB / -1.0 dB USB Connector Type C Power Consumption Max. 2.5W Dimension 164 mm (W) × 105.5 mm (D) × 65 mm (H) Weight 355g   Typical Magnitude Frequency Response of XLR Input @ Sampling Rate 192kHz THD, THD+N, SNR, SNAD, ENOB of XLR Input @ 1kHz, 1Vp SMPTE IMD of XLR Input @ 1Vp 7. Measurement Microphone M215 Specifications (for VT RTA-268A) Transducer Type 1/2" low-noise pre-polarized condenser Polar Pattern Omni-directional Sensitivity (±2dB) 40 mV/Pa Frequency Response 20Hz ~ 31.5kHz Power Supply 48V Phantom Power Max. SPL (<1% THD) 135dB Equivalent Noise Level <18 dBA Output Impedance <75Ω Temperature Coefficient (dB/℃) 0.009 Humidity Coefficient (dB/%RH) 0.001 Pressure Coefficient (dB/kPa) 0.008 Length 155mm Weight 120g Connector 3-pin XLR Compliance IEC 61094 and IEC 61672 Class 1   Typical Polar Pattern of M215 Typical Frequency Response of M215 8. Measurement Microphone M215L Specifications (for VT RTA-268B) Transducer Type 1/2" low-noise pre-polarized condenser Polar Pattern Omni-directional Sensitivity (±2dB) 10 mV/Pa Frequency Response 20Hz~20kHz Power Supply 48V Phantom Power Max. SPL (<1% THD) 145dB Equivalent Noise Level <20 dBA Output Impedance <75 Ω Temperature Coefficient (dB/℃) 0.009 Humidity Coefficient (dB/%RH) 0.001 Pressure Coefficient (dB/kPa) 0.008 Length 155mm Weight 120g Connector 3-pin XLR Compliance IEC 61094 and IEC 61672 Class 1 9. Measurement Microphone M50 Specifications (for VT RTA-268C) Transducer Type Small Diaphragm low-noise pre-polarized conderser Polar Pattern Omni-directional Sensitivity (Typical) 34 mV/Pa Frequency Response 3Hz ~ 50kHz Power Supply 24~48V Phantom Power, 10mA Max. SPL 140dB Equivalent Noise Level <20 dBA Output Impedance 65Ω Minimum Output Load 600Ω Dimension 229 × 22mm Weight 225g Connector 3-pin XLR Typical Polar Pattern of M50 Typical Frequency Response of M50 Note: This is only a typical frequency response chart. The measurement microphone M50 is calibrated individually and the calibration data is included in the product package. 10. Some Applications 1. Polarity Check for Speakers, Microphones and Amplifiers using Multi-Instrument 2. Magnitude Frequency Response Measurement using Octave Analysis with Periodic Pink Noise Excitation (no averaging is required unlike the case of pink noise) 3. Measurement of Reverberation and Its Related Acoustic Parameters using the Interrupted Noise Method (Note: Multi-Instrument Pro or above is required) 4. Measurement of Reverberation and Speech Intelligibility Parameters using the Integrated Impulse Response Method (Note: Multi-Instrument Pro or above is required) 5. Discontinuity Measurement for Detection of Glitch, Digital Dropout, Speaker Rub and Buzz (Note: Multi-Instrument Pro or above is required) 6. Sound Quality Measurement Example - Loudness, Loudness Level, Sharpness of a white noise in a Free Field (Note: Multi-Instrument Pro or above is required) 7.  Live Music Broadcast Latency Measurement using Generalized Cross Correlation with Software-Switchable Mixer-Level Loopback As Time Reference



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