TH1778A DC Bias Current Source

Tonghui TH1778A series adopts a new generation AC/DC superposition test theory to adapt test requirements for high precision and high frequency. The built-in embedded MCU with high-performance can quickly respond to host and slave machine conditions or malfunction and make real-time indication, which helps improve the work efficiency.


Unit Price: US$ 6,342

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Key Features

Test frequency: 0 to 2MHz

Provide 0-20A of constant current output for single one

Support 6 machines at most and reach 120A of constant current output

Extreme refined current step: when <1A, reach 5mA

Can be controlled independently or controlled by LCR

Current output mode: single current, step scan

Providing real-time operation mode for all parameters and settings without waiting

New file management system with easy, prompt and accurate operation

Providing two kinds of SCPI command modes with good adaptability

Excellent tailing capability and extendibility, additional slave superposition depending on the demands

Offering dual-progress bar indication and corresponding small tools



Current Step

•   0mA-1.000A: 5mA

•   1.000A-5.000A: 25mA

•   5.0A-120.0A: 100mA

Supporting Test Frequency

0Hz – 2MHz

Sweep Adjustment Time

•   0mA-1.000A: 4ms-3600s

•   1.000A-5.000A: 10ms-3600s

•   5.0A-120.0A: 20ms-3600s




480×272 16:9 24-bit true color TFT LCD

(Note: see more technical specifications in the ‘Resource’ – ‘Datasheet’)

Main Machine

Module No. Item Description
TH1778A DC Bias Current Source Single machine output: 0-20A, including test box, test fixture and RS232 connection cable