30MHz Analog Oscilloscope 20MHz Low cost Student CRO Dual Channel Oscilloscope TOS-2030CH
Analog Oscilloscope 20MHz
Features
Dual channel 20MHz/30MHz/40MHz
10 times sweep magnification
TV synchronization; X-Y mode
High illumination internal graticule CRT
Encoded switch, reliable and durable
Fully sealed durable attenuation switch
ALT triggering function, enabling simultaneous observation of two independent signals
Specifications
20MHz |
40MHz |
50MHz |
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Vertical system |
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Sensitivity |
5mV~5V/DIV, 10 steps in 1-2-5 sequence |
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Accuracy |
≤3% |
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Vernier sensitivity |
≤1/2.5 of panel indicated value |
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Bandwidth |
DC (AC 10Hz)~20MHz |
DC (AC 10Hz)~40MHz |
DC (AC 10Hz)~50MHz |
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AC coupling |
<10Hz (at 100kHz, 8DIV, frequency response -3dB) |
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Rise time |
Approx. 17.5ns |
Approx. 8.75ns |
Approx. 7ns |
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Input impedance |
Approx. 1MΩ//Approx. 25pF |
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DC balance shift |
5mV~5V/DIV: ±0.5DIV |
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Vertical mode |
CH1, CH2, DUAL (ALT/CHOP), ADD, CH2 INV |
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Chopping repetition frequency |
Approx. 250kHz |
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Input coupling |
AC, GND, DC |
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Max. Input voltage |
400V peak-peak, AC frequency≤1kHz |
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Common mode rejection ratio |
>50:1 at 50kHz sine wave (set CH1 and CH2 at same sensitivity) |
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CH2 INV BAL |
Balanced point variation≤1DIV (referred to graticule center) |
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Horizontal system |
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Sweep time |
0.2us~0.5s/DIV, 20 steps in 1-2-5 sequence |
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Accuracy |
±3%, X10MAG: ±5% (20ns~50ns/DIV uncalibrated) |
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Vernier sweep time control |
≤1/2.5 of panel indicated value |
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Sweep magnification |
X10 (fastest sweep time 20ns/DIV) |
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Position shift@X10MAG |
≤2DIV at CRT screen center |
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Linearity |
±5%, X10MAG: ±10% (0.2s~1us) |
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Trigger system |
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Trigger mode |
AUTO, NORM, TV-V, TV-H |
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Trigger level lock |
Not provided |
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Trigger source |
CH1, CH2, ALT, LINE, EXT |
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Trigger coupling |
AC: 20Hz to full bandwidth |
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Trigger slope |
“+” or “-” |
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Sensitivity |
Frequency |
20Hz~2MHz |
2MHz~20MHz |
20MHz~40MHz |
40MHz~50MHz |
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CH1, CH2 |
1DIV |
1.5DIV |
2.5DIV |
3DIV |
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ALT |
2DIV |
3DIV |
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EXT |
200mV |
800mV |
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TV |
Sync pulse>1DIV (EXT: 1V) |
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External trigger input |
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Input impedance |
Approx. 1MΩ//Approx. 25pF |
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Max. input voltage |
400V (DC+AC peak), AC frequency≤1kHz |
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X-Y mode |
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Sensitivity |
5mV~5V/DIV±3% |
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X-axis bandwidth |
DC~500kHz (-3dB) |
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Phase error |
≤3° at DC~50kHz |
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Calibration signal output |
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Waveform |
Positive-going square wave |
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Frequency |
Approx. 1kHz |
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Duty ratio |
<48:52 |
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Output voltage |
2Vpp±2% |
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Output impedance |
Approx. 1kΩ |
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Frequency counter (only for TOS-2020CF, TOS-2040CF, TOS-2050CF) |
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Display |
6 digits LED |
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Accuracy |
±0.01% |
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Component test (only for TOS-2020CT, TOS-2040CT, TOS-2050CT) |
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Testing subject |
Resistor, Capacitor, Coil, Diode, Zener or simple combination of the components |
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Testing voltage |
Approx. 9Vac pp |
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Testing frequency |
50/60Hz |
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Testing current |
Approx. 0.6mA |
All products by TWINTEX are tested and guaranteed to keep in good quality with one year warranty except wearing parts, such as test leads and power cords.
If quality problems happen during warranty period, we provide technical supports and spare parts. Our local distributor if any will help to solve your problems in time after receiving phone calls or emails.
Welcome to contact us at any time if any questions about using our products.
However, TWINTEX is free of responsibility to personal injuries or property damages caused by improper operation.