The calibration of antenna system can be carried out using a calibration hung under a balloon, and the calibration of the receiver can be carried out using a standardsignalgenerator.
天馈系统的标定可利用气球放飞的定标球，接收机的标定可利用标准信号源。
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Standardsignalgenerator (Figure 1 standardsignalgenerator diagram) of the output signal level accurate readings, the increase in the rate of transfer or shift can also read the meter.
This paper gives a detailed analysis of the principle of the phase lock circuit, one of the most important parts of the QF1052B StandardSignalGenerator and provides some methods of checking it.