수중 음향 센서
▶ 프리앰프
프리앰프 외장형
CCA1000
CCA 1000 Conditioning Charge Amplifier
- - 1Hz ~ 1MHz 대역폭, 입력 저항 선택
- - 저주파수 허용치 설정
- - 6단계의 Gain
- - 물 얼룩 방지
- - 하이드로폰과 프리앰프 사이의 케이블 거리가 길 때 사용
제품 사양
| Input: | |
| Impedance max.: | 1Gohm |
| Max input at (unity gain): | 2Vp |
| Estimating Input gain: | (dB) = 20 log Ctr/Cin |
| Input capacitance selector: | 12 steps: 22pF to 10nF |
| Input resistance selector: | 12 steps: 3.3kohm to 1Gohm |
| Output: | |
| Output gain settings 6 steps: | 0, 6, 12, 20, 26, 32dB |
| Signal output, max: | 2Vp |
| Output impedance: | 20ohm |
| DC off-set: | 0 |
| Bandwidth | |
| Operating -3dB Frequency range at 20dB gain: | 1Hz to 1MHz |
| Noise: | |
| Input termination: | 1nF to GND |
| Output noise with selector settings | |
| 1nF/1GOhm/0dB: | 2-4μVrms/A |
| 10nF/1GOhm/20dB: | 8-10μVrms/A |
| 1nF/1GOhm/20dB: | 14-20μVrms/A |
| 100pF/1GOhm/20dB: | 80-110μVrms/A |
| Power supply: | |
| Voltage: | min.: 12VDC max.: 24VDC |
| Current consumption: | 40mA ±10mA at 12Vdc |
| Lower frequency limit: | |
| Frequency limits (-3dB) versus input resistance at 1nF | |
| input load: | |
| 1GOhm | |
| 330Mohm | |
| 100Mohm | |
| 33Mohm | |
| 10Mohm | |
| 3.3Mohm | |
| 1ohm | |
| 330kOhm | |
| 100kOhm | |
| 33kOhm | |
| 10kOhm | |
| 3.3kOhm | |
| Weight: | |
| Including supply cable: | |
| Input capacitance settings: To obtain close unity input gain from a hydrophone, - set the input capacitance selector to a capacitance value close as possible to the hydrophone (end of cable capacitance). The input gain is then calculated from: transducer capacitance Ctr. divided by the input capacitance Cin x 20 log = dB gain | |
| Example: | |
| a. 20 log (1nF/1nF) = 0dB | |
| b. 20 log (8nF/4.7nF) = +4.62 dB gain | |
| USER INSTRUCTIONS |
| Connect the supply cable to a battery or AC powered DC supply. The required voltage is 12 to 24VDC. DC supply common/ground should be connected to water for min. noise. |