Features: 1. The display interface adopts 2.4-inch TFT color LCD, which makes the operation more intuitive and convenient. 2. The instrument USES direct digital frequency synthesizer (DDS) technology to provide stable, accurate, pure and low-distortion signals. 3. Rich keyboard shortcuts and graphical user interface simplify each operation, easy to operate. 4. Surface mount technology can improve anti - interference and service life. 5. The instrument USES A 14-bit high D/A conversion chip (5Vpp output quantization error less than 1mV), A sampling rate of 250MSa/s, and A vertical resolution of 14bit. 6. Various modulation types: AM, FM, PM, ASK, FSK and PSK modulation. 7. Scanning function: four properties of the scannable signal, including frequency, amplitude, offset and duty cycle; It has two kinds of Linear and Logarithm scanning type; Scanning time: 0.01S-9999.99S; Up, down and round trip scanning directions. 9. Function of 100M frequency meter: it can measure frequency, period, pulse width and duty ratio. The frequencies that work are 100MHz and Min. Frequency behavior: 0.01 Hz. 10. Counter function: there are 2 coupling measurement modes, including DC coupling and AC coupling. This design can solve the inaccurate problem of ac coupling. 11. Output short circuit protection: when the load short circuit, all channels can work for more than 60 seconds. Specification: Item Type: Signal Generator Material: Plastic Model: FY6900 Frequency parameter Frequency Range: Sine wave: 0Hz~30MHz Square wave: 0Hz~20MHz Triangle wave: 0Hz~10MHz Sawtooth wave: 0Hz~10MHz Frequency range of arbitrary waves: 0 ~ 10MHz TTL / CMOS digital wave range: 0~20MHz Minimum width adjustment of pulse wave: 20ns Hey. Frequency resolution: 1μHz (0.000001Hz) Frequency error: (+/-) 20ppm Frequency stability: (+/-) 1ppm / 3 hours Waveform parameters: Waveform types: sine wave / triangle wave / square wave / sawtooth wave, Lorentz pulse wave and arbitrary waveform. Arbitrary wave non-volatile storage (64): 64 user-defined arbitrary waveforms can be stored Waveform length: 8192Points (4K points) x14Bits Sampling rate: 250MSa / s Vertical resolution: 14 bits Sine wave: Harmonic arrival system: ≥50dBc ( 20MHz: ±2.5V Offset resolution: 0.01V Phase adjustment range: 0~359.99° Phase resolution: 0.01° External measurement: Frequency measurement range: GATE-TIME = 1S 1Hz-60MHz Counting range: 0~4294967295 Count: manual Regular measurement: 20ns resolution, maximum measurable 40s Scanning function: Scan mode: linear scan, logarithmic scan Scanned objects: frequency, amplitude, offset, and duty cycle Scan time: 0.01s-999.99S / step Frequency setting range: starting point and ending point can be set freely Frequency sweep range: determined by scan parameter settings General parameters: RAM Quantity: 20 Location: M0~M20 interface Interface mode: use USB to serial interface Communication rate: 115200bps Protocol: Using the command line, the protocol is common power supply Display type: 2.4in TFT color display Ambient temperature: 0~40 °C Humidity: