宽带测址（见IEC 60268-1中6.1）    滤波器应是频率响应在图Cl所示限值范围内的带通滤波器。    带通滤波器在22.4 Hz-22.4 kH：之间其有大致不变的传输系数，在该频带以外，其衰减按（:13/T 3241规定的其中心频率为31. 5 Hz和16 000 H：的倍频程带通滤波器所规定的衰减速率衰减，其频率响应在本标准规定的限值范围内。

Type: NG 8280   
Input voltage: 17 VAC.For mains connection use the submitted AC adapter only.  
Input power: 7 VA  
Input fuse: T400mA, 250V  
Output:             Sine wave 1kHz;  Filtered pink noise  
Output Voltage Low: 0–100mV/1kohm   0–35mVrms/1kohm   
            Medium: 0–1V/1kohm      0–350mVrms/1kohm   
            High:   0–5V/1kohm      0–1.7Vrms/1kohm  
Dimensions: W = 290 mm; D = 270 mm; H = 75 mm  
Weight: 1.3 kg      AC adapter included  
Operating temperature:+15 - +35 °C   
Function  ON / OFF：On/Off switch   
Sine 1 KHz / Pink Noise：Switch for sine wave or filtered pink noise  
Level：   Switch for 3 different output levels   
Adjust：  Adjustment of output voltage  
Phase Shift 90° / 0°：  One of the outputs shifted 90° compared with the other or the outputs are in phase.  
A Out, B Out：Output connectors, Phono socket ａnd 4 mm sockets (Banana type).   
Cleaning： To clean the unit, wipe with a soft, dry cloth. For stubborn dirt wet a soft cloth with a mild detergent solution, wring well, ａnd then wipe off the dirt.  Also use a dry cloth to wipe the surface dry. Do not use volatile liquids such as benzene or thinner, which are harmful to the unit.  
Service    There is no service adjustments inside the unit. In case of trouble, contact Intertek Semko AB.