— Vartech® Oscilloscopes
SS-5020B 20 MHz Dual Channel Analog Oscilloscope (CRO)
Classic dual-channel 20 MHz CRO with ALT triggering and ×10 sweep magnification — proven reliability for electronics labs and service workshops.
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About This Instrument
The Vartech SS-5020B is a 20 MHz dual-channel analog oscilloscope (CRO) with a 6-inch rectangular CRT, 8×10 division internal graticule and 2 kV accelerating voltage. Vertical sensitivity covers 5 mV to 5 V/div with ±3% accuracy. Trigger modes include AUTO, NORM, TV-V and TV-H with four trigger source selections. A ×10 sweep magnification extends the sweep to 20 nS/div. A 1 kHz calibrator output (2 Vp-p) is built in for probe checking. Optional x1/x10 ratio probes available.
Key Features
- 20 MHz bandwidth — DC (AC 10 Hz) to 20 MHz (−3 dB); rise time ≤17.5 nS
- Dual channel (CH1, CH2, DUAL ALT/CHOP, ADD, CH2 INV) — simultaneous two-signal display
- 5 mV to 5 V/div vertical sensitivity (±3%) — wide dynamic range
- ×10 sweep magnification — extends max sweep to 20 nS/div
- ALT, AUTO, NORM, TV-V, TV-H trigger modes with CH1, CH2, ALT, LINE, EXT sources
- Built-in 1 kHz calibrator output (2 Vp-p ±2%) for probe adjustment
- X-Y operation — sensitivity 5 mV to 5 V/div, X-axis bandwidth DC to 500 kHz
Technical Specifications
| CRT | 6-inch rectangular, internal graticule 8×10 div (1 div = 1 cm), accelerating voltage 2 kV |
| Bandwidth | DC (AC 10 Hz) ~ 20 MHz (−3 dB) |
| Rise Time | ≤17.5 nS |
| Vertical Sensitivity | 5 mV ~ 5 V / div (±3%) |
| Max. Input Voltage | 400 V (DC + AC p-p) |
| Input Coupling | AC, DC, GND |
| Input Impedance | ≈1 MΩ // 25 pF |
| Vertical Mode | CH1, CH2, DUAL (ALT/CHOP), ADD, CH2 INV |
| Sweep Time | 0.2 µS ~ 0.5 S / div (±3%); ×10 Mag: 20 nS ~ 50 mS / div (±5%) |
| Sweep Magnification | ×10 (max sweep time = 20 nS / div) |
| Trigger Modes | AUTO, NORM, TV-V, TV-H |
| Trigger Source | CH1, CH2, ALT, LINE, EXT |
| Trigger Sensitivity | CH1/CH2: 0.5 div (20 Hz ~ 2 MHz) / 1.5 div (2 ~ 20 MHz); EXT: 200 mV / 800 mV |
| Calibrator Output | 1 kHz square wave, 2 Vp-p (±2%) |
| X-Y Sensitivity | 5 mV ~ 5 V / div (±4%); Phase error ≤3° (DC ~ 50 kHz); X-axis bandwidth DC ~ 500 kHz |
| Power Supply | AC 220 V ±10%, 50 Hz, ≈35 W |
| Accessories | Operating manual, mains cord. Probes (×1 / ×10) optional. |
| Dimensions & Weight | 310 (W) × 150 (H) × 455 (D) mm | Approx. 8 Kg |
Specifications sourced from the official Vartech product catalogue. Download above for the full datasheet.
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