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1309-2型通信卫星测试仪,能够在C和Ku波段频率范围内测试通信卫星接收机。它能够从3.7至8.4千兆赫,10.7至12.2千兆赫,14至14.5千兆赫范围内测试信号,因而在C和Ku频段范围的下行和上行线频率都包括进去了。测试仪的输出电平以大的精度在C频段内130分贝范围里和在K_u频段内100分贝范围里变化,所以接收机的动态范围可以很精确的测量。提供输出信号的信号源是速调管空腔调谐振荡器。这种型式的振荡器产生的信号具有低的边带调频噪声。这个特性使得它适用于频分多址通信系统单边带信道中测量噪声电平。
1309-2 Communications Satellite Tester, capable of testing communications satellite receivers over the C and Ku band frequencies. It can test signals from 3.7 to 8.4 GHz, 10.7 to 12.2 GHz, 14 to 14.5 GHz and therefore includes both downlink and uplink frequencies in the C and Ku band ranges. The output level of the tester varies with great accuracy in the 130 dB range in the C band and in the 100 dB range in the K_u band, so the receiver’s dynamic range can be measured very accurately. The source for the output signal is the klystron cavity tuning oscillator. The signal generated by this type of oscillator has low sideband FM noise. This feature makes it suitable for measuring the noise level in single-sideband channels of a FCD communication system.