Channel : 2 Waveforms Sine, Square, Ramp, Triangle, Pulse, Noise, Arb Sine 1 µHz ~ 20 MHz Square 1 µHz ~ 5 MHz Pulse 500 µHz ~ 3 MHz Ramp/Triangle 1 µHz ~ 150 kHz White Noise 5 MHz bandwidth (-3 dB) Arb. 1 µHz ~ 5 MHz Resolution 1 µHz Accuracy ± 50 ppm in 90 days ± 100 ppm in 1 year 18°C ~ 28°C Temperature Coefficient < 5 ppm/°C Counter Function : Frequency, period, positive/negative Pulse width, Duty cycle Counter Frequency Range : 100 mHz ~ 200 MHz Black and White LCD Screen ( 256 x 64 ) Standard configuration interfaces: USB Device & USB Host, and support U-disc storage Supply Voltage 100 ~ 240 VACRMS, 45 ~ 440 Hz, CAT II Manufacturer : Rigol