room-noise spectrum

The two good methods of the testing in screen room and the dynamic test in frequency spectrum analysis meter for insertion loss are described in detail.

详细描述了在屏蔽室测量和频谱分析仪动态测量两种插入损耗测试的方法；

The transmittance spectrum and fluorescence spectrum of Tb3+: YAl3 ( BO3) 4 crystal are measured at room temperature.

测量了晶体的室温透过谱和荧光光谱。

The EPR spectrum at low temperature was also taken to compare with that at room temperatrue.

同时测定了低温EPR谱图以便比较.

The results demonstrated that in the range from room temperature to 90 ℃, there was a critical temperature, below which a three time constant impedance spectrum was observed and above which a two time constant spectrum was shown.

结果表明：在低于90℃的范围内，存在一个谱图转变临界温度，临界温度之下为三个时间常数型谱图，临界温度之上为两个时间常数型谱图。

The room temperature Mssbauer spectrum of this alloy consists of seven ferromagnetic and one paramagnetic sextet superposition. The seven ferromagnetic spectra belong to α 1 phase in the alloy, the magnitude of their internal magnetic field is 309 kOe.

在室温下，该合金的穆斯堡尔谱可以分解为八套亚谱，其中7个铁磁性亚谱属于合金中脱溶的α1相，它的平均超精细磁场约为309kOe；