Four Channels Frequency List Sweep Function on TFG2900A Arbitrary Waveform Generators

Nowadays, many arbitrary waveform generators can provide frequency sweep functions, basically, linear sweep and logarithmic sweep can be realized. Linear sweep means the output frequency changes in a constant way of some Hz per second, which is more suitable for applications of some narrow sweep frequency range. Logarithmic sweep is the output frequency changes in a constant way of octave per second, which is more suitable for applications of some wide sweep frequency range.

But in the actual electronic development work, the frequency sweep types required by the engineers are diverse, some need multiple channels frequency list sweep, and some need more complicated frequency sweep.

Here we take Suin TFG2900A as an example to introduce how to realize multiple channels frequency list sweep.

Firstly, we need another arbitrary waveform generator, using Suin TFG6800 to provide the external trigger signal to TFG2900A. Connect TFG6800 with TFG2900A via a BNC testing cable with four connectors or four BNC testing cables with three BNC T-mode connectors. Set the external signal in TFG6800, as Fig. 1 shown.

 

Fig. 1 Set the external signal on TFG6800

Then set the frequency list sweep function parameters in four channels on TFG2900A, such as external trigger source, sample rate, list length, frequency, sync output, etc., according to your actual requirement, as Fig. 2 shown.

 

Fig. 2 Set frequency list parameters in four channels on TFG2900A

After the above all is set to OK, press the output key on TFG6800, and the signal will be output according to the previous setting, which can be easily and clearly displayed in a four channels oscilloscope, as Fig. 3 shown.

 

Fig. 3 four channels frequency list sweep displaying in a four channels oscilloscope

If you want to know more information about TFG2900A four channels arbitrary waveform generator or if it is helpful for your testing work, welcome to contact us at once.

Digital Modulation Introduction of TFG6960A

Modulation plays a very important role in a communication system. It has a great impact on the system's transmission effectiveness and reliability and determines the performance of a communication system.

Analog modulation and digital modulation are two different signal modulation methods, analog modulation has poor anti-interference ability, easy to produce clutter and so on. Compared with analog modulation, digital modulation has better anti-disturbance performance, stronger anti-channel loss, and better security, widely used in television broadcasting, telephone communications, wireless communications, satellite communications and other fields .

Digital modulation is using digital signals to control the parametric changes of the carrier signal,  which is an important method of modern communication, Then we take our TFG6960A as an example to introduce two commonly used digital modulation.

FSK: Different frequencies are used to represent different signals.

For example, open the modulation mode, select FSK, set frequency, amplitude, Hop frequency, and FSK frequency of the generator, connect to the oscilloscope, and view the modulated signal, shown in Fig 1.

 

Fig 1. FSK Modulation

BPSK: 0 and 1 are used to judge the phase of the signal before and after.

For example, select BPSK, set frequency, BPSK frequency, and Hop frequency, and view the signal on the oscilloscope, shown in Fig 2.

 

Fig 2. BPSK Modulation

Above is the introduction of the digital modulation of TFG6960A, if you also want to know more about its analog modulation, welcome to consult.