Category Oscilloscope Product Name Handheld digital oscilloscope Brand GW/INSTEK Model GDS-122 20MHz, 2-Channel Handheld Digital Storage Oscilloscope with Multimeter Function FEATURES   20MHz Bandwidth   100MS/s Real-Time Sampling Rate   True RMS Multimeter: Volt, AMp, Ohm, Continuity, Diode   Dual Independent Floating Isolated Channels       (for Multimeter and Between Oscilloscope and Multimeter)   Trigger Mode: Free Run, Single Shot, Edge, Video   USB Interface   6 Hour Capacity Li-ion Rechargeable Battery   3.8" Color LCD, Resolution: 320 x 480   Light Weight: 690g SPECIFICATIONS   VERTICAL   Channels 2 Analog Bandwidth 20MHz Single Bandwidth Full bandwidth Rise Time 17.5ns Sensitivity 5mV/div ~ 5V/div at the BNC input DC Gain Accuracy ±5% DC Measurement Accuracy ±(5% reading + 0.05div): average sampling Analog Digital Converter Resolution 8 bits, synchronously sampling on both channels Displacement Range ±50V (500mV ~ 5V), ±1V (5mV ~ 200mV) Low Frequency Response AD Coupling, -3dB ±5Hz at the BNC input TRIGGER   Sources CH1, CH2 Trigger Sensitivity 2div, peak-to-peak value Trigger Sensitivity: Edge Trigger DC coupling: 1div (full bandwidth) AC coupling: same as the DC coupling (≧50Hz) Trigger Level Range ±6div from the screen center Trigger Level Accuracy ±0.3div typical Trigger Displacement 655div (pre-trigger), 4div (post-trigger) 50% Level Setting Input signal ≧50Hz (typical) Video Trigger NTSC, PAL, SECAM (any line or frequency) HORIZONTAL   Sampling Rate 10S/s ~ 100MS/s Waveform Interpolation sinx/x Record Length 6k points on each channel Scan Speed 5ns/div ~ 5s/div, 1-2.5-5 step Sampling Rate and Relay Time Accuracy ±100ppm (≧1ms) Time Interval Accuracy (Full Bandwidth) Single: ±(1 sampling interval time + 100ppm x reading + 0.6ns) Average >16: ±(1 sampling interval time + 100ppm x reading + 0.4ns)   INPUT   Input Coupling DC, AC Input Impedance 1MΩ ±2%, connected in parallel with 20pF±3pF Probe Attenuation Coefficient 1X, 10X, 100X, 1000X Maximum Input Voltage 400V (peak) Channel Delay Time 150ps (typical) SAMPLING   Sampling Mode Normal, Peak Detect, Average Sampling Rate 100MSa/s MEASUREMENT   Cursor Measurement Voltage difference and Time difference between cursors Auto Measurement Peak-to-peak, Average, Root mean square, Frequency, Cycle MULTIMETER SPECIFICATIONS   Input Impedance 10MΩ Voltage VDC: 400mV, 4V, 400V ±(1% + 1digit) VDC: 4V, 40V, 400V ±(1% + 3digits) Maximum Input Voltage DC 400V, AC 400V (virtual value) Frequency 40Hz ~ 400Hz DC Current 40mA, 400mA ±(1.5% + 1digit), 20A ±(3% + 3digits) AC Current 40mA ±(1.5% + 3digits), 400mA ±(2% + 1digit), 20A ±(5% + 3digits) Impedance 400Ω ±(1% + 3digits), 4kΩ, 40kΩ, 400kΩ, 4MΩ ±(1% + 1digit), 40MΩ ±(1.5% + 3digits) Capacitance 51.2nF ~ 100uF ±(3% + 3digits) Diode 0V ~ 1.5V on/off measurement < 50Ω (±30Ω) beep GENERAL SPECIFICATIONS   Display Type 3.8" color liquid crystal display Display Resolution 320 (horizontal) x 240 (vertical) pixels Display Color 4096 colors Power Supply 100 ~ 240VAC, 50Hz, CATII Power Consumption <6W Operating Temperature Battery Operation: 0 ~ 50℃ (32 ~ 122F) Power adaptor operation: 0 ~ 40℃ (32 ~ 104F) Dimensions & Weight 180 x 115 x 40 mm 0.69kg