扫描频率外差式分析器
sweep frequency heterodyne-type analyzer
外差频率计
heterodyne frequency meter
红外外差式辐射仪
infrared heterodyne radiometer
外差频率调制
modulation of offset frequency
频率差计
differential frequency meter
meter of frequency difference
凹腔式频率计
reentrant type frequency meter
半同轴式频率计
semicoaxial frequency meter
超高频谐振式频率计
SHF resonance frequency meter
UHF resonance frequency meter
传输式频率计
transmission type frequency meter
电桥式频率计
bridge type frequency meter
电子计数式频率计
electronic counter type frequency meter
调谐振簧式频率计
tuned reed frequency meter
蝶形电路式频率计
butterfly circuit type frequency meter
蝶形调谐式频率计
butterfly tuner type frequency meter
反馈式频率计
reaction type frequency meter