9640型可以用来衡量方向性通过频率特性的测试方法。测试对象可以准确地旋转使用转台系统,它位于所需的角度测量麦克风。
响应的测试对象可以获得任何方向使用脉冲指向性和极线图BZ 5551。
控制转台
转台控制器类型5997提供三种模式的操作(把rel,把abs和续)和三个命令集0°,。和Max_360。 把rel和把abs允许一个相对或绝对转(指定在度)能。当一个极线图的单一频率是必需的,控制模式是被选中作为它的可转动的连续旋转以一个恒定的速度。作为试验对象具有不同的惯性,加速和减速的启动和停止阶段可以使用命令控制。加速度的转盘可以调整以适应不同的测试对象群众,多达100公斤。
设置0°命令用于设置的零刻度,将参考一个给定的测试。为了防止电缆包装,MAX_360命令限制了0°和360年之间转动°。或者,电缆可以通过滑环美联储的转盘,允许无限数量的旋转。
远程控制WB 1254提供5命令控制转台5960型通过一个15米的电缆。“”键用来把测试对象顺时针和逆时针方向,分别。当测试对象被放置在起点,的零刻度可以设置按0°设置。操作的模式可以选择在前面板的转台控制器5997型。转台可以启动或停止使用启动和停止键。
Type 9640 can be used to measure directivity by means of frequency-response test methods. The test object can be urately rotated using the Turntable System so that it is located at the desired angle to a measurement microphone. The response of the test object can then be obtained for any direction using PULSE Directivity and Polar Plot BZ 5551.
Controlling the TurntableTurntable Controller Type 5997 offers three modes of operation (Turn_Rel, Turn_Abs and Cont.) and three commands Set 0°, . and Max_360. Turn_Rel and Turn_Abs allow a relative or absolute turn (specified in degrees) to be made. When a polar plot of a single frequency is required, the CONT mode is to be selected as it rotates the turnable continuously at a constant speed. As test objects have different inertia, the eleration and deceleration in the start and stop phases can be controlled by using the command . The eleration of the turntable can be adjusted to modate different test object masses, up to 100 kg.
The Set 0° command is used to set the zero degree mark that will be the reference for a given test. In order to prevent cable wrapping, the MAX_360 command limits the turns between 0° and 360°. Alternatively, the cable can be fed through the slip ring on the turntable, allowing an unlimited number of rotations.
Remote Control WB 1254 offers 5 commands for controlling Turntable Type 5960 via a 15 m cable. The "" keys are used to turn the test object clockwise and anticlockwise, respectively. When the test object has been positioned at the starting point, the zero degree mark can be set by pressing Set 0°. The mode of operation can be chosen at the front panel of Turntable Controller Type 5997. The turntable can then be started or stopped by using the Start and Stop keys.
