GRAS 12AX 4 通道 CCP 电源模块，带增益
Connection: CCP Channels: 4
Gain: 0, 20, 40 dB
GRAS 12AX CCP（恒流电源）电源是用于 CCP 传声器套件的低底噪 4 通道电源。
Technology
简介
The GRAS 12AX is a constant current power module for powering 4 CCP preamplifiers/microphone sets.
It is optimized for integration into a production environment. The anodized enclosure is sturdy and offers good protection against dirt, dust, and moisture.
Except for the power switch, it has no external user controls. In this way unintended change of the gain settings is avoided.
设计
As the 12AX is a 4-channel unit, it has 8 BNC connectors, 4 for the input from the microphones and 4 for the output to the analyzer. All connectors are mounted on the rear panel.
It provides 5 mA of constant current at +28 VDC compliance voltage level.
The gain is selectable individually for each channel by means of jumpers. These are accessible by removing a cover at the top plate. The gain can be set to 0, 20 or 40 dB. The chosen gain is indicated by green LEDs on the front panel.
It has error detection at the input and overload detection at the output. The error detection at the input warns against a DC error, typically a short or a broken connection. The overload detection is applied at the output. If the signal exceeds 22 VACp-p, the overload detection will warn about it. DC error and overload are indicated by red LEDs on the front panel, one for each channel.
It has a low noise floor and a wide frequency range: At 0 dB gain, the noise is 1.5 µV and the frequency range from 1 to 300 kHz (+1/-3 dB).
It can handle long cables without significant degradation of the frequency performance.
It operates from 9 - 18 VDC from a mains voltage adapter which is included.
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。12AX 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
标配一个电源适配器: | (根据订单所在国而定) |
GRAS AB0002 | Power supply 230 VAC to 15 VDC. EU-connector |
GRAS AB0006 | Power supply 230 VAC to 15 VDC. UK-connector |
GRAS AB0003 | Power supply 120 VAC to 15 VDC. USA-connector |
选配
| RA0321 | Rack Mounting Kit (for mounting 2 x 12AX side by side) |
| 12AX-S20 | 12AX Power Module (Excluding Power Supply) |
GRAS Sound & Vibration 保留更改规格和配件的权利，恕不另行通知。
