VT RTA-168A/B Manual Rev. 1.5
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Virtins Technology
2 Specifications
2.1 VT RTA-168A/B Hardware Configuration
RTA-168A
RTA-168B
Measurement Microphone
ECM999
EMM-6
XLR-to-USB Sound Card
VT XLR-to-USB Pre
VT XLR-to-USB Pre
2.2 Overall VT RTA-168A/B Specifications
Frequency Range
20Hz ~ 20kHz
Sampling Rate
44.1kHz / 48kHz
Bit Depth
16 Bit
Number of Input Channels
1
Frequency Accuracy
0.01%
Frequency Weighting
Flat, A, B, C, ITU-R 468
Time Weighting
Linear, Exponential
(Equivalent continuous sound level (
Leq
) fully
complies with IEC61672)
Sound Level Measurement Range
35dB ~ 125dB (typical), adjustable through both
the hardware gain switch and software gain
slider. Recalibration is not required after the gain
setting changes.
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, etc.
Much more functions are described in the
software manual.
System Requirements
Windows XP/VISTA/7/8/8.1/10, 32 bit or 64 bit.
Minimum Screen Resolution: 1024
600
2.3 Measurement Microphone ECM999 Specifications (for VT RTA-168A)
Transducer Type
Back Electret Condenser
Element
Pressure, FET Preamplifier
Polar Pattern
Omni-directional
Frequency Response
20Hz~20kHz
Open Circuit Sensitivity (at 1kHz)
14mV/Pa (-37dBV/Pa)
Rated Impedance
200
Minimum Load Impedance
3000
Equivalent Noise Level (A-weighted) 22dB
Max. SPL (1k
load)
132dB (THD<1%, 1kHz)
Dynamic Range (1k
load)
106dB
Pin Polarity
Pin 2 outputs positive voltage (with reference to
