GRAS 12AU 1-Channel Universal Power Module with signal conditioning and power amplifier
Connection: Traditional 200 V / CCP
Channel(s): 1
The GRAS 12AU is a supply and conditioning amplifier for simultaneously powering a preamplifier for a condenser microphone and an amplifier for a loudspeaker. It is ideally suited for automated production line testing of micro speakers and mobile devices with built-in speaker.
Technology
典型应用
Electroacoustic tests of:
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Telephones
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Hearing aids
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Loudspeakers
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Portable devices, for example, tablets, GPS, etc.
设计
It is designed for automated production line testing of key loudspeaker parameters, such as frequency response, rub and buzz, THD, and impedance. The 12AU’s design makes it ideally suited for test of portable devices with built-in loudspeaker such as mobile phones, hearing aids, tablets, and GPS devices.
The inherent noise is very low, and by design, it avoids system-generated noise, for example from ground loops. In a measurement setup, it controls the paths of (a) the signal sent out to the loudspeaker and (b) the resulting acoustic signal picked up by a condenser microphone fitted to the preamplifier.
It is remotely controlled via its USB interface and is delivered with a control program for Microsoft Windows ®.
12AU 配有内置电源，带有电压选择开关，可用于 115 V 或 230 V 交流操作。包装盒内还附有一根电源线，根据产品收货地，配有欧盟、英国或美国插头。
特点
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Single-channel conditioning amplifier suited for both CCP and 200 V LEMO preamplifiers
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Very low inherent noise
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The speaker input and the analog outputs are floating with respect to common ground to avoid system-generated noise
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Speaker amplifier with measurement of loudspeaker impedance without disturbing the speaker
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Fulfills EMC requirements according to EU regulations
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Full remote control via USB interface
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Gain settings:
– Microphone conditioner: 0 to 50 dB in 10 dB steps
– Speaker amplifier: –20 dB to +10 dB in 10 dB steps
– Current output: 0 dB and +20 dB
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Filters:
– Microphone amplifier: 1 Hz or 20 Hz
– Speaker amplifier: DC or AC coupling (10 Hz)
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Comprehensive status and overload indication
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Rack-mountable in 19” rack.
Measurement Control with 12AU
In a complex measurement setup, it is often difficult to avoid system-generated noise. Also, it can be tedious to correctly set up all the parameters of the measurement chain with respect to sensitivity, gain, filtering and overload handling.
With the 12AU, you can control the loudspeaker amplifier and microphone conditioner simultaneously.
The 12AU is remote-controlled via its USB interface and a control program for Windows. You can operate the 12AU using a graphical user interface or by entering commands. Multiple 12AUs can be controlled from the same PC.
These features make the 12AU ideal for automated production line testing.
技术规格
All outputs except the speaker amplifier output have fixed 100 kHz (3 dB) low pass filters to minimize the need for anti-aliasing filtering in the following analyzing equipment. There is no phase shift between microphone input and output due to prepolarized or externally polarized microphones. It is designed without relays.
保修
所有GRAS产品均采用优质材料制造，确保产品具有卓越的长期稳定性和耐久性。12AU 提供 2 年保修，但因使用不当导致的损坏不在保修范围内。
服务与维修
所有维修均在位于丹麦的 GRAS 国际支持中心进行。我们的支持中心配备了最新的测试设备，并拥有技术精湛的专业工程师。根据要求，我们会按照固定的维修类别进行成本估算。在质保期内的产品送修时，如非人为操作不当或违反保修条款导致的损坏，将享受免费维修服务。
Specifications
GRAS Sound & Vibration 保留更改规格和配件的权利，恕不另行通知。
Dimensions
All dimensions in mm.
Ordering info
标配
| - | 电源线带欧盟、美国或英国插头，具体取决于产品收货地。 |
