Min. Order : 10 Sets
>=30 Sets

Education electronic circuit training kits / High frequency modulation / demodulation trainer

Note: Please be cautious and check with your supplier if this product is for virus protection purposes and if the coronavirus (COVID-19) will affect your order.
Trade Assurance
Built-in order protection service in alibaba.com
Product quality
On-time shipment
More on shipping and other trade services.

Quick Details

Brand Name: GTEE
Usage: Students Understanding
Keywords: Electronic Training Kits
Place of Origin: Guangdong China
Product name: High frequency electronic circuit training kit
Model Number: GTET-ET001
Certificate: ISO9001
Selling Units: Single item
Single package size: 50X38X16 cm
Single gross weight: 10.0 KG
Guangzhou Guangtong Educational Equipment Co., Ltd.
Gold Supplier
Manufacturer, Trading Company
Response Rate
On-time delivery rate
R&D staffs
Visit Store


Product Description 


For accurate price, please contact GTEE salesteam!


Technical parameters

1. The system has built-in DDS low frequency signal source (AM, DSB, FM waveform for

function signal, music signal, modulation signal and carrier signal synchronization), microphone signal, DDS high frequency signal source and frequency meter.

1) Low frequency function signal:

    Frequency: 100HZ-200KHZ

    Amplitude: 0-5Vpp

2) High frequency signal source:

    Frequency: 100KHZ-40MHZ

    Amplitude: 50mv-2000mvpp

3) Frequency meter:

    Frequency range: 0-40MHZ

    Amplitude: not less than 50mv

2. Sweeper

The system has a built-in sweep signal source and amplitude phase detection circuit, which can directly display the amplitude and frequency characteristics of the resonant circuit on the LCD screen.

1) Sweep range: 1MHZ-20MHZ adjustable home, start and stop frequency can be set

2) Sweep time: Programmable

3) Frequency standard instructions: Direct reading bandwidth and resonant peak frequency   

of mobile frequency standard


Product description

The whole system consists of one main control module and five basic experimental modules, which can complete more than 20 practical training including high-frequency electronic each unit circuit experiment, wireless transceiver system debugging, fault setting determination, and experimental evaluation. 


Product compositions

Baseboard module:

Low frequency DDS signal source

Function signal

Frequency adjustable from 0.1 to 50KHZ, 10MVp-p to 5Vp-p (continuously adjustable)

Music signal


Modulation signal

The modulation signal and carrier synchronization can display the AM, DSB and FM waveforms on the common oscilloscopes.

Telephone interface


Wireless voice communication can be carried out            

Audio amplifier, speaker


Perform power amplifier output on the receiver's audio signal

DDS high frequency signal source

High frequency sine wave

Frequency range: 1HZ ~ 25MHZ, output amplitude: 100MVp-p to 2Vp-p (continuous adjustable)

Frequency meter


Measurement frequency range: 0-25MHZ, input voltage not less than 50mv;

Frequency sweep meter


Amplitude and frequency characteristics of color LCD display, sweep frequency range, time programmable

Experiment module

Sine wave oscillator and transistor mixing

LC frequency 4-12MHz, can be used to study the amplitude 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.

Intermediate release AGC and demodulation module

Amplify the 2.5MHz intermediate frequency signal, and the gain is 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.

Resonant circuit module

Single tuning, double tuning, through the varactor to adjust the 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.

High frequency power amplifier module

Wireless transmission:

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.

Frequency modulation and capacitance coupling frequency discrimination module

Capacitive coupling loop phase discriminator, slope discriminator 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.

Integrated multiplier amplitude modulation, mixing and synchronous demodulation modules

AM, DSB, SSB modulation and demodulation, carrier frequency 100KHZ-2.5MHZ.

Can be completed: Modulation, modulation signal output, mixing filter and other functional assessment.



Basic experiments

1. Small-signal tuning amplifier circuit experiment (including single-tuning and double-tuning)

2. Nonlinear Class C Power Amplifier Circuit Experiment

3. Three-point oscillator experiment (including LC oscillator and crystal oscillator)

4. Intermediate frequency amplifier experiment

5. Mixer experiment (including transistor mixing and diode ring mixer)

6. Envelope detection and synchronous detection experiments

7. Variable capacitance diode frequency modulation experiment

8. Discriminator experiment (capacitance couple loop phase discriminator, slope discriminator)

9. AM Transmitter Joint Experiment

10. AM Receiver Joint Test Experiment

11. Transmit and receive complete systems of the intermodulation experiment

12. FM transmitter test experiment

13. FM receiver joint experiment


Related products (If you are interested, please click on the picture!!!)


HTB1xIbry49YBuNjy0Ffq6xIsVXa8.jpg   HTB1bIy3yY1YBuNjSszeq6yblFXag.jpg   GTET-1012

                GTET-1006                                 GTET-1007                                          GTET-1012


Packaging & Shipping

Solid plywood box and normally ship by sea, but if the size is not big, also by air, Fedex or DHL, TNT and so on.


Our Services

1.OEM & ODM Service

Customer requirement is our biggest concerns, we are flexible to satisfy customer needs as much as we can.


2.Technical Support

Good English training materials and training videos help teachers and students for better teaching effects.

Remote and on-site training or technical support are provided.


3.Solution for International Tenders

GTEE has professional engineer team for tender specification review and can quote competitive price to support our customers to win many international tenders and provide good quality products and good after-sales service to gain good reputation.


ISO  GTEE en800


Company Information

Guangzhou Guangtong Educational Equipment Co.,LTD is a well-know high-tech company, we participate in many international educational tenders and help our customer win the tender.


We are specialized in development and manufacturing of professional Educational Equipment including automotive teaching equipment, air conditioning and refrigeration teaching equipment, electrical and electronic teaching equipment, lift teaching, solar energy trainer, electric car training device and other vocational training equipment etc.


GTEE is located in Baiyun District, Guangzhou City and adjacent to Guangzhou Baiyun International Airport.

With our several years of design, development, manufacturing and international service experience and expertise, GTEE is growing up and developing very fast. We continuously focus on providing high quality products with competitive price and reliable after sale services for our overseas customers. We will response to our customers within 24 hours after get the feedback and requirements.

Company information


Q: Are you trading company or manufacturer ?

A: We are manufacturer .


Q: How long is your delivery time?

A: Depends on product quantity and stock. Please check with our sales team.


Q: What is your terms of payment ?

A: Payment<=5000USD, 100% in advance. Payment>=5000USD, 50% T/T in advance balance before shipment.


Q: Do you offer after-sales support ?

A: Yes, of course, we will provide training materials together with the device, and also we can provide on site training and installation if customer request. We also have technical engineer for online or remote support, and if within warranty, products parts damaged due to our quality problems, we will send parts via DHL to you for replacement for free as we seek long term cooperation with customers.


Q: How to have exclusive sales rights of GTEE ?

A: Place order to GTEE, when the order amount reach certain level, GTEE  and customer will negotiate about exclusive rights.

Or Send your company profile to GTEE, after GTEE evaluation, start from general agents and gradually become exclusive agent.


Customer visit



 Contact Rose