1. Introdução
This manual provides detailed instructions for the safe and effective operation of your Jaycar Digitech QC1938 100MHz Digital Oscilloscope. Please read this manual thoroughly before using the device to ensure proper setup, operation, and maintenance. Retain this manual for future reference.
2. Informações de segurança
Observe the following safety precautions to prevent injury and avoid damage to the instrument or any products connected to it.
- Fonte de energia: Connect the oscilloscope only to the power source specified in this manual.
- Aterramento: Ensure the instrument is properly grounded to prevent electric shock.
- Sondas: Use only probes supplied or recommended by the manufacturer. Ensure probes are rated for the voltage sendo medido.
- Ventilação: Não obstrua as aberturas de ventilação. Garanta uma circulação de ar adequada ao redor do instrumento.
- Ambiente: Operate the oscilloscope in a dry environment. Avoid exposure to moisture, dust, or extreme temperatures.
- Manutenção: Refer all servicing to qualified service personnel. Do not attempt to repair the instrument yourself.
3. Conteúdo da embalagem
Verifique se todos os itens listados abaixo estão presentes em sua embalagem:
- Jaycar Digitech QC1938 Digital Oscilloscope
- 10:1 Passive Probe with 1.5m lead
- 2 x BNC to Clip Test Leads
- Cabo USB
- Cabo de alimentação
- Manual do usuário (este documento)
4. Produto acabadoview
The Jaycar Digitech QC1938 is a 100MHz Digital Oscilloscope designed for precise electronic measurements. It features a 7-inch color LCD screen, two independent channels, and a built-in waveform generator.



Principais características:
- 7-inch TFT color LCD screen with 800 x 480 pixel resolution
- Two independent input channels
- 100MHz bandwidth and 1GSa/s samptaxa de ling
- 8M memory depth (single channel)
- Integrated 25MHz waveform generator (Sine, Square, Ramp, Exponential, Noise, DC)
- Auto scale function for automatic sine and square wave detection
- 14 trigger modes including Edge, Pulse, Video, Slope, Overtime, Window, Pattern, Interval, Under Amp, UART, LIN, CAN, SPI, and IIC
- 5 serial protocol triggers and decodes: RS232/UART, I2C, SPI, CAN, and LIN
- Two 3-digit digital voltmeters and a 6-digit hardware frequency indicator
- 32 types of auto measurements with real-time statistics
- USB Host/Device interface for computer control and data storage
5. Configuração
5.1 Conexão de Energia
- Connect the supplied power lead to the power input on the rear panel of the oscilloscope.
- Plug the other end of the power lead into a grounded AC power outlet.
- Pressione o botão liga/desliga no painel frontal para ligar o osciloscópio.
5.2 Conexão de Sonda
- Connect the BNC connector of the passive probe to either Channel 1 (CH1) or Channel 2 (CH2) input on the front panel.
- Attach the ground clip of the probe to the circuit's ground point.
- Connect the probe tip to the test point in your circuit.
- Ensure the probe's attenuation setting (e.g., 1X or 10X) matches the setting on the oscilloscope for accurate readings.
6. Instruções de operação
6.1 Operação básica
- Auto Scale: Press the 'AUTO SET' button to automatically adjust vertical, horizontal, and trigger settings for a stable waveform display. This function detects sine and square waves automatically.
- Vertical Controls (VOLTS/DIV, POSITION): Use the VOLTS/DIV knobs to adjust the vertical scale (voltage per division) for each channel. The POSITION knobs shift the waveform vertically.
- Horizontal Controls (SEC/DIV, POSITION): Use the SEC/DIV knob to adjust the horizontal scale (time per division). The horizontal POSITION knob shifts the waveform horizontally.
- Nível de desencadeamento: Adjust the 'TRIGGER LEVEL' knob to set the voltage level at which the oscilloscope captures a waveform.
6.2 Funções Avançadas
- Gerador de forma de onda: Access the waveform generator menu to select and configure output waveforms such as Sine, Square, Ramp, Exponential, Noise, and DC. Connect the 'WAVE GEN' output to your circuit.
- Modos de gatilho: Utilize the 14 available trigger modes (Edge, Pulse, Video, Slope, Overtime, Window, Pattern, Interval, Under Amp, UART, LIN, CAN, SPI, IIC) to capture specific events. Select modes via the 'TRIGGER' menu.
- Serial Protocol Decoding: The oscilloscope supports decoding for RS232/UART, I2C, SPI, CAN, and LIN protocols. Configure these settings in the 'DECODE' menu to view decoded data.
- Medidas: The device offers 32 types of automatic measurements with real-time statistics (maximum, minimum, standard deviation, etc.). Access these via the 'MEASURE' menu.
- Conectividade USB: Connect a USB thumb drive to the USB Host port to save oscilloscope setups, waveforms, reference waveforms, CSV files, and images. The USB Device port allows for remote control from a computer using SCPI commands.
7. Manutenção
7.1 Limpeza
Para limpar o instrumento, use um pano macio.ampened with a mild detergent solution. Do not use abrasive cleaners or solvents that could damage the casing or screen. Ensure the device is powered off and unplugged before cleaning.
7.2 Armazenamento
When not in use, store the oscilloscope in a dry, dust-free environment away from direct sunlight and extreme temperatures. Use the original packaging or a suitable case for protection during transport.
8. Solução De Problemas
If you encounter issues with your oscilloscope, refer to the following common problems and solutions:
| Problema | Possível causa | Solução |
|---|---|---|
| Sem energia | Power cable not connected; Power outlet faulty; Power button not pressed | Check power cable connection; Test power outlet; Press power button firmly |
| Nenhuma forma de onda exibida | Probe not connected; Incorrect input channel selected; Vertical/Horizontal scale incorrect; Trigger level too high/low | Connect probe to CH1/CH2; Select correct channel; Adjust VOLTS/DIV and SEC/DIV; Adjust TRIGGER LEVEL or use 'AUTO SET' |
| forma de onda instável | Incorrect trigger settings; No stable trigger source | Adjust trigger level; Select appropriate trigger mode; Ensure a stable signal source |
| Unidade USB não reconhecida | USB drive formatted incorrectly; Drive not fully inserted | Ensure USB drive is FAT32 formatted; Re-insert USB drive firmly |
Se o problema persistir após tentar essas soluções, entre em contato com o suporte ao cliente.
9. Especificações
| Parâmetro | Especificação |
|---|---|
| Mostrar | LCD colorido TFT de 7 polegadas |
| Resolução | 800 x 480 pixels |
| Tipo de exibição | Point, Vector |
| Canais | 2 |
| Largura de banda | 100 MHz |
| SampTaxa de ling | Up to 1 GSa/s |
| Profundidade de memória | 8M (single channel) |
| Faixa Vertical | 2mV / div ~ 10V / div |
| Resolução Vertical | 8 bits |
| Gerador de forma de onda | Seno, Quadrado, Ramp, Exponential, Noise, DC |
| Interface | USB Host, USB Device |
| Peso | 1.9 kg |
| Dimensões (C x A x L) | 318 mm x 150 mm x 110 mm |
10. Garantia e Suporte
Para informações sobre garantia e suporte técnico, consulte a documentação fornecida no momento da compra ou entre em contato com o revendedor. Guarde o comprovante de compra para eventuais solicitações de garantia.





