TB230621S01 High Frequency Electronic Circuit Training Kit Educational Equipment Electrical Laboratory Equipment

Low frequency

DDS signal

source

5Vp-p (continuously adjustable)

display the AM, DSB and FM waveforms on the

common oscilloscopes

100MVp-p to 2Vp-p (continuous adjustable)

and transistor mixing

frequency characteristics of the Schiller oscillation circuit and the

Clapper oscillation circuit.

Crystal: 8.8MHZ.

Triode mixer circuit: Local oscillator input 8.8MHZ carrier 6.3MHZ,

output 2.5MHZ.

Can be completed: Operation point setting, voltage impact on the

oscillation frequency, oscillation frequency, high frequency signal

amplitude, filter center frequency and other control assessment.

AGC

and

demodulation

module

greater than 20db.

Envelope detection, observe the diagonal cutting distortion and

bottom cutting distortion, and low frequency amplification.

Can be completed: Intermediate frequency selection loop,

Intermediate release gain, detection distortion, signal output

amplitude and other parameters control and assessment.

module

tuning loop parameters, reliable and stable performance; center

frequency 6.3MHZ.

Can be completed: Single tuning double tuning loop parameters,

tuning loop frequency-selective characteristics control and

assessment.

frequency

power

amplifier

module

6.3MHZ transmit for base amplitude modulation. Observe the

phenomenon of class-C working state of high-frequency power

amplifiers, test the tuning characteristics and load characteristics of

class-C amplifiers, test the effects of changes in excitation signals, load changes and power supply voltage variations on the operating

state, and the cosine pulse waveform can be clearly observed in

three states of undervoltage, critical and overvoltage.

Amplitude modulation:

Can be completed: Power amplifier work status control and

assessment.

modulation

and

capacitance coupling

frequency

discrimination

module

6.3MHZ center frequency.

Synchronous demodulation and integrated mixing (Local oscillator

input 8.8MHZ carrier 6.3MHZ, output 2.5MHZ).

Can be completed: FM signal center frequency, signal amplitude,

frequency discrimination loop characteristics, operating point

parameter control and assessment.

amplitude

modulation,

mixing

and

synchronous

demodulation

modules

100KHZ-2.5MHZ.

Can be completed: Modulation, modulation signal output, mixing

filter and other functional assessment.