Radio frequency signal source with amplitude modulation and automatic level control functions

A radio frequency signal source and amplitude modulation technology, applied in the field of measurement and testing, which can solve problems such as circuit design difficulties

Active Publication Date: 2015-06-24
SUZHOU RIGOL PRECISION ELECTRIC TECH
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  • Abstract
  • Description
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Problems solved by technology

[0030] In order to solve the problem in the background technology that the design of the entire circuit is difficult because the AM modulation and ALC cir

Method used

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  • Radio frequency signal source with amplitude modulation and automatic level control functions
  • Radio frequency signal source with amplitude modulation and automatic level control functions
  • Radio frequency signal source with amplitude modulation and automatic level control functions

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Embodiment Construction

[0096] In order to make the above objects, features and advantages of the present invention more comprehensible, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0097] Attached with reference image 3 And attached Figure 4 , shows a specific embodiment of the ALC circuit (automatic level control circuit) 300 of the present invention, the ALC circuit 300 includes a variable attenuation unit 301, a power distribution unit 302, a wave detector 303, a digital chip 304, an analog A digital converter 305, a digital-to-analog converter 306, wherein the input terminal 3A of the variable attenuator 301 is the input terminal of the ALC circuit 300, and the output terminal of the variable attenuator 301 is connected to the power distribution unit 302 input terminal, the first output terminal 3B of the power distribution unit 302 is used as the output terminal of the ALC circuit 300, and the second...

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Abstract

The invention discloses a radio frequency signal source with the amplitude modulation and automatic level control functions. The radio frequency signal source is characterized in that a modulation signal generating unit generates amplitude modulation signals, a variable attenuation unit is driven by drive signals to generate attenuation signals for input signal attenuation, a power distribution unit divides the attenuation signals into two paths, one path of the attenuation signals are directly output, the other path of the attenuation signals are output to a detector, the detector detects the input signals, detected signals are acquired, data processing units generate the drive signals according to the amplitude modulation signals and the detected signals, the variable attenuation unit comprises a first variable attenuator and a second variable attenuator which are connected in series, the first data processing unit generates the first drive signals for driving the first variable attenuator according to the detected signals, and the second data processing unit generates the second drive signals of the second variable attenuator according to the amplitude modulation signals. Amplitude modulation and automatic level control are separately set, the requirements of amplitude modulation and automatic level control do not need to be taken into consideration by all elements, and a circuit is easy to achieve.

Description

technical field [0001] The invention relates to the technical field of measurement and testing, in particular to a radio frequency signal source with amplitude modulation and automatic level control functions. Background technique [0002] In the field of measurement and testing, the RF signal source is a necessary measurement and testing instrument for RF and microwave workers. The radio frequency signal source is a radio frequency signal transmitting device, which can output continuous wave radio frequency signals with various parameters such as frequency and amplitude. Of course, it can also output various modulation signals, such as FM, AM, PM, IQ, Pulse and other modulation signals. The amplitude accuracy and stability of the output signal of the RF signal source is one of the important indicators of the RF signal source, and these indicators are generally realized by the ALC circuit (Automatic Level Control automatic level control circuit). [0003] The Chinese patent...

Claims

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Application Information

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IPC IPC(8): H03G3/30
Inventor 何东林罗浚洲王悦王铁军李维森
Owner SUZHOU RIGOL PRECISION ELECTRIC TECH
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