FNIRSI 2C53T STD Oscilloscope Probe Guide Malaysia - How to Use 1X and 10X Probe Settings
FNIRSI 2C53T STD Oscilloscope Probe Guide Malaysia - How to Use 1X and 10X Probe Settings
Using the correct oscilloscope probe setting is essential for accurate voltage and waveform measurements.
One common problem experienced by electronics technicians is an incorrect voltage reading caused by a mismatch between the probe attenuation setting and the oscilloscope configuration.
The FNIRSI 2C53T STD is a portable 3-in-1 electronic testing instrument combining a 50MHz dual-channel digital oscilloscope, True RMS digital multimeter and built-in signal generator.
This guide explains the difference between 1X and 10X oscilloscope probes and how to avoid common measurement errors.
WHAT IS AN OSCILLOSCOPE PROBE?
An oscilloscope probe connects the instrument to an electronic circuit.
The probe allows technicians to observe electrical waveforms, measure voltage amplitude and analyse signal timing.
Different probes have different attenuation ratios, bandwidth limits, input impedance characteristics and voltage ratings.
WHAT DOES 1X PROBE MEAN?
A 1X probe transfers the signal to the oscilloscope without intentional 10-to-1 attenuation.
For example, a 2V signal is presented to the oscilloscope input at approximately 2V, subject to loading and other measurement effects.
A 1X setting can be useful for suitable low-frequency, low-voltage measurements.
However, a passive probe operating in 1X mode may have lower bandwidth and greater circuit loading than when operating in 10X mode.
WHAT DOES 10X PROBE MEAN?
A 10X probe attenuates the input signal by a factor of ten.
For example, a 10V signal produces approximately 1V at the oscilloscope input.
When the oscilloscope is configured for a 10X probe, it compensates for the attenuation and displays the corresponding measured signal voltage.
A suitable compensated 10X passive probe generally provides lower circuit loading and better high-frequency measurement performance than its 1X setting.
However, the actual performance depends on the probe and oscilloscope specifications.
1X VS 10X OSCILLOSCOPE PROBE COMPARISON
Attenuation:
1X - No intentional attenuation
10X - Signal reduced by a factor of ten
Example Input:
1X - 5V signal presented as approximately 5V
10X - 5V signal presented as approximately 0.5V
Bandwidth:
1X - Often lower
10X - Often higher
Circuit Loading:
1X - Often greater
10X - Usually lower with a suitable passive probe
Low-Level Signal Sensitivity:
1X - May be more suitable for small, low-frequency signals
10X - Reduces the signal amplitude reaching the oscilloscope
HOW TO SET THE CORRECT PROBE ATTENUATION
Step 1 - Identify the Probe
Check whether the supplied probe supports 1X, 10X or another attenuation ratio.
Step 2 - Select the Probe Ratio
If the probe has a physical 1X/10X switch, select the required position.
Step 3 - Match the Oscilloscope Setting
If the oscilloscope provides a probe attenuation menu, set it to match the actual probe ratio.
Step 4 - Connect to a Safe Signal
Use a suitable isolated low-voltage reference signal within the instrument and probe ratings.
Step 5 - Check the Displayed Voltage
Confirm that the displayed amplitude matches the expected signal.
Step 6 - Check Probe Compensation
Where the probe and instrument support compensation adjustment, follow the manufacturer's procedure using an appropriate reference waveform.
WHY IS MY OSCILLOSCOPE SHOWING THE WRONG VOLTAGE?
A common cause is mismatched probe attenuation.
Example:
Actual Signal: 5V
Physical Probe: 10X
Oscilloscope Setting: 1X
The oscilloscope may display approximately 0.5V because it is not compensating for the probe's attenuation.
If the oscilloscope setting is changed to 10X, the displayed value should be approximately 5V, assuming correct calibration and a suitable waveform.
The reverse mismatch can cause a displayed reading approximately ten times higher than the actual signal.
WHEN SHOULD YOU USE 1X?
A 1X setting may be useful for:
- Suitable low-frequency signals
- Small-amplitude signals
- Basic electronics education
- Low-voltage circuit testing
Always consider probe bandwidth and circuit loading.
WHEN SHOULD YOU USE 10X?
A 10X setting may be preferable for:
- General waveform measurements
- Faster signal transitions
- Higher-frequency electronic signals
- Measurements where reduced circuit loading is important
A 10X probe does not automatically make hazardous voltages safe to measure.
COMMON OSCILLOSCOPE PROBE MISTAKES
1. Probe set to 10X but oscilloscope set to 1X
2. Probe set to 1X but oscilloscope set to 10X
3. Using a probe with insufficient bandwidth
4. Incorrect probe compensation
5. Poor probe ground connection
6. Excessively long ground leads
7. Exceeding the probe or oscilloscope voltage ratings
8. Connecting probe references to incompatible circuit points
IMPORTANT ELECTRICAL SAFETY
Before connecting any oscilloscope probe, verify the input ratings, probe ratings, circuit voltage and grounding arrangement.
Do not connect the FNIRSI 2C53T STD directly to live mains, high-voltage switching circuits, VFD power outputs or hazardous electrical installations without appropriately rated equipment and an approved safe measurement procedure.
A 10X probe reduces signal amplitude at the instrument input but does not guarantee electrical safety.
WHO SHOULD USE THIS GUIDE?
- Electronics repair technicians
- PCB troubleshooting workshops
- Engineering students
- Technical colleges
- TVET training centres
- Industrial electronics maintenance personnel
- Electronics hobbyists
FNIRSI 2C53T STD OSCILLOSCOPE PROBE MALAYSIA
MTM Precision Sdn Bhd supplies FNIRSI electronic testing and measurement instruments in Malaysia.
We welcome enquiries from electronics repair workshops, engineering companies, educational institutions and industrial maintenance departments.
Customers throughout Kuala Lumpur, Selangor, Johor, Penang, Melaka, Negeri Sembilan, Perak, Pahang, Sabah and Sarawak may contact MTM Precision for product availability, quotation and model selection assistance.
MTM Precision Sdn Bhd
Showroom & Service Centre
No. 29-1 & 29-2, Jalan Bandar 18,
Pusat Bandar Puchong,
47160 Puchong, Selangor, Malaysia.
Tel: 03-8080 7172
WhatsApp: +6016-660 7346
Email: mtmpre@yahoo.com
Website: www.mtmpre.com.my
08 Oct 2026
