Signal generator - What can a high frequency signal generator be used for

Signal generator is a kind of instrument which can produce video signal. Its types are varied, models and specifications are complicated. According to the output wave type, there are a variety of sinusoidal AC signal generators, waveform signal generators, and inclusive signal generators. According to the frequency category of the output data signal, there are ultra-low frequency signal generators, low frequency signal generators, video signal generators, high frequency signal generators and high frequency signal generators. High frequency signal generator is also called frequency signal generator, the frequency range of data signal in the middle of 300kHz-300MHz, widely used in high frequency circuit detection. In order to detect communication equipment, such instruments and equipment have one or more of the components of the deployment (including sine AC amplitude modulation, sine AC radio broadcast and pulse modulation). The frequency, pulse signal and regulation rules of the output data signal can be adjusted and accurately read in a certain range.

Second, the application of audio signals

1. Check the audio signal

The camera of the digital oscilloscope is connected with the audio output terminal of the high frequency generator to adjust the radio sound resistor. The output force of the signal generator should be moderate, and it is not necessary to load the automatic tuning control loop of the radio. Look at the digital oscilloscope to display information on the modulation and demodulation of the outgoing audio signal wave pattern and strength. The wave pattern is better and the force is larger. Pay attention to the adjustment should be based on the digital oscilloscope display information status, immediately reduce the signal generator of high frequency data signal output strength. Observe whether the digital oscilloscope detects a 1KHz audio signal.

The 2.1KHz audio signal provides the radio operational amplifier

First, the frequency segment switch in the fourth zone is placed "1", and then the surround sound generator dispensing power switch in the fourth zone is placed "CW" (carrier-frequency first-class wave). The audio signal is output by the audio output power socket. The audio signal to the radio audio signal input terminal 24 pin, under the condition of normal operation of the amplifier, the digital oscilloscope is connected to the amplifier audio output terminal 27 pin, you can observe a group of enlarged audio signal wave pattern. The strength of the audio signal can be considered according to the demand, according to the high, medium and low gear of the audio output strength switch and the audio output strength adjustment knob.

3. Application of radio broadcast surround sound signal generator

The frequency segment switch is placed "1", the power supply switch is placed "FM", and the radio broadcast surround sound data signal is output from the high-frequency data signal output power socket. If the signal is detected, the frequency of a radio station broadcasting a stereo radio is not working in the 88-108MHz range.

The operation steps are: First turn on the radio switching power supply, then the high frequency data signal output power socket lead cable wiring, and connected to the radio wireless antenna, adjust the frequency adjustment knob of the high frequency signal generator so that the dial finger in the frequency scale "1" frequency segment 88MHz, if the radio can emit a clear sound, indicating that the radio in the low frequency to accept all normal. Then adjust the frequency adjustment knob of the high frequency signal generator to the frequency scale of 108MHz, adjust the automatic tuning knob of the radio, if the radio can also emit a clear sound, indicating that the receiver of the high frequency of the radio is also normal.

4. Application of radio broadcasting and amplitude modulation high frequency signal generator

The frequency segment switching switch is placed as required to select the frequency segment, and the power switch is selected as required for amplitude modulation, carrier frequency or radio broadcasting. The high frequency data signal output strength adjustment is adjusted by the high frequency output strength adjustment knob and the high frequency output strength switching switch cooperate with each other, and the high frequency data signal is output by the output power socket. If an amplitude-modulated high frequency data signal is used, check whether the frequency of an amplitude-modulated radio is operating in the range of 535-1605kHz.

Its operation process is: First of all, the high frequency signal generator allocation switch is selected as "AM" (amplitude modulation), the frequency segment switching switch is placed "3", the frequency knob is adjusted, so that the watch finger is around 0.535MHz of the third scale, and then the high frequency data signal output power socket lead cable is connected, close to the radio antenna. Then turn on the amplitude modulation radio switching power supply, adjust the automatic tuning knob of the radio so that the dial is pointed at the 53.5kHz perimeter of the radio frequency scale, when the radio can emit a clear sound, indicating that the low and medium frequency of the radio accepts everything normal. With this method, according to the adjustment of the automatic tuning knob of the radio and the frequency segment of the high-frequency signal generator power switch, frequency knob, etc., it can be checked whether the frequency of the radio "three-point tracking" is accurate.