Product Description

Analog Oscilloscope(20Mhz)

• Brand: Twintex
• Model: TOS-2020CH
• Country of origin: Taiwan
• Country of manufacture: China

Features:

• Dual channel 20MHz
• 10 times sweep magnification
• TV synchronization; X-Y mode
• High illumination internal graticule CRT
• Japanese encoded switch, reliable and durable
• Fully sealed durable attenuation switch
• ALT triggering function, enabling simultaneous observation of two independent signals

Technical Specification:

• Vertical System:
• Sensitivity: 5mV~5V/DIV, 10 steps in 1-2-5 sequence; Accuracy≤3%
• Vernier sensitivity: 1/2.5 or less than panel indicated value
• Bandwidth: DC (AC 10Hz)~20MHz
• Rise time: Approx. 17.5ns
• Input impedance: Approx. 1MΩ//Approx. 25pF
• Vertical mode: CH1, CH2, DUAL (ALT/CHOP), ADD, CH2 INV
• Chopping repetition frequency: Approx. 250kHz
• Input coupling: AC, GND, DC
• Max. Input voltage: 300V peak-peak, AC frequency≤1kHz
• Common mode rejection ratio: >50:1 at 50kHz sine wave (set CH1 and CH2 at same sensitivity)

Horizontal system: 

• Sweep time base: 0.2us~0.5s/DIV, 20 steps in 1-2-5 sequence
• Vernier sweep time: ≤1/2.5 of panel indicated value
• Sweep magnification: X10 (Max. sweep time base 20ns/DIV)
• Linearity: ±5%, X10MAG: ±10% (0.2s~1us)
• Trigger system:
• Trigger mode: AUTO, NORM, TV-V, TV-H
• Trigger level lock: Not provided
• Trigger source: CH1, CH2, LINE, EXT
• Trigger coupling: AC: 20Hz to full bandwidth
• Polarity: “+” or “-” polarity

External trigger input: 

• Input impedance: Approx. 1MΩ//Approx. 25pF
• Max. input voltage: 400V (DC+AC peak), AC frequency ≤1kHz

X-Y mode:

• Sensitivity: 5mV~5V/DIV, ±3%
• X-axis bandwidth: DC~500kHz (-3dB)
• X-Y phase error: ≤3° at DC~50kHz
• Calibration signal: 1kHz±5% square wave, 2Vpp±2%;
• Output impedance: Approx. 1kΩ
• Frequency counter:
• Display: 6 digits LED
• Display accuracy: 0.01% Component test
• Testing subject: Resistor, capacitor, coil, diode, zanier or simple combination of the components
• Testing voltage: Approx. 9Vac pp
• Testing frequency: 50/60Hz
• Testing current: Approx. 0.6mA

CRT:

• Type: 6" rectangle, internal Graticule, 8x10DIV (1DIV=1cm)
• Phosphor: P31
• Accelerating voltage: Approx. 2kV (20MHz); Approx. 12kV (40MHz)
• Trace rotation: Adjustable at front panel
• General:
• Power source: AC110V/220V±10%, 50/60Hz, Max. 35VA
• Accessories: Power cord x1, Operation manual x1, Probe x2