MV211 1/2-inch Preamplifier
MV211 is 1/2-inch preamplifier developed by BSWA, which is suitable for
MK series 1/2-inch 200V polarized microphones. It is a low-noise and
high-quality preamplifier that can be used in a variety of acoustic
applications.
The main
function of the preamplifier is impedance change, since the output impedance of
the microphone is above GΩ, it cannot be directly connected to the common data
acquisition equipment. The high input impedance and low output impedance of the
preamplifier can reduce the output impedance of the microphone to less than 100
Ω.
MV211 can provide polarization voltage to the microphone, so it is
suitable for 200V polarized microphones (it can also be used for pre-polarized
microphones when the polarization voltage of the power supply is turned off).
This kind of preamplifier can be powered by single power supply (28 V ~ 120 V)
or dual power supply (±14 V ~ ±60 V) and the MC7xx series power supply
conditioner is required. When using a single power supply, the output signal of
the preamplifier has a DC bias voltage, which is approx. 1/2 of the supply
voltage. However, when using dual power supply, the output bias voltage is
approx. 0 V (with an error of ± 1 V).
MV211 is supplied with a 2-metre fixed cable (customizable length) and a
LEMO connector (male plug) as the output. It should be noted that different
microphone capacitance can affect the low-frequency response of the
preamplifier, while different capacitive output loads (including the cable
length) can affect the high-frequency response of the preamplifier.
MV211 can choose to supply with TEDS to support read
microphone information directly by data acquisition equipment, including
microphone model, serial number, sensitivity, etc. BSWA TEDS microphone
supports the IEEE 1451.4 standard. The version of 0.9 is used by default to be
compatible with more data acquisition equipment. The version of 1.0 can also be
selected according to user’s requirements.
Features:
● Suitable for 1/2-inch 200V polarized microphone
● Single or dual power supply preamplifier
● Frequency response: 2.5 Hz ~ 200 kHz (±0.5 dB)
● Attenuation: 0.25 dB (typ.)
● Connector: 7-pin LEMO
● Optional TEDS (IEEE.1451.4)
Applications:
● Common acoustic measurement
● Environmental, industrial, traffic and other acoustic
measurement
● Acoustic metrology measurement
技术参数：
| Diameter | 1/2" | |
|---|---|---|
| Polarization Voltage Support | Yes | |
| Frequency Response (Hz) (±0.5 dB) 1 | 2.5 ~ 200 k | |
| Attenuation (dB) | 0.25 (typ.) | |
| Maximum Output Voltage (Vp) 2 | ±9 ~ ±55 | |
| Self-generated Noise (μV) | A-weighted | <3 (2.2 typ.) |
| 20 Hz ~ 20 kHz | <6 (4.1 typ.) | |
| Input Impedance (G ǁ pF) | 15 ǁ 0.4 | |
| Output Impedance (Ω) | <30 (23 typ.) | |
| Power Supply | Single: 28 V ~ 120 V, Dual: ±14 V ~ ±60 V | |
| DC Bias Voltage (V) | Approx. the midpoint voltage of PWR+ plus PWR- | |
| Operating Temperature Range (°C) | -30 ~ 80 | |
| Operating Humidity Range (%RH) | 0 ~ 95 | |
| Dimensions (mm) | Ø12.7 × 96.3 | |
| Mounting Thread for Microphone | 11.7 mm-60 UNS | |
| Output Connector | LEMO FWG.1B.307 | |
| Weight (g) | 90.5 (with 2-metre fixed cable and LEMO connector) | |
| TEDS | Optional, IEEE 1451.4 compliant (default v0.9, optional v1.0) | |
|
Note 1: Measured using a 15 pF microphone capacitance under small signal conditions (1 Vrms). |
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Download information:
MV211 1/2-inch Preamplifier Brief
