... curve tracer Shanghai Total Co., Ltd. is producing oscilloscope, signal generator, function generator, frequency counter, bench top meter, spectrum analyzer, curve ... %·Duty adjust 20%~80%·DC offset: ±10V1MΩ±5V50Ω·Rectange rise time: ≤100ns 5Vp-p 1MHz·Attenutor: ≤±3%· Duty vs. ... Counter Accuary: 5digital ±1% ±1digital·Resolution: 0.1Hz·Gate Time: 10s10.1s·Ext. Frequency Test: 1Hz~10MHz·Ext. Sensitivity: ...