频率计，数字频率计，GFC-80的详细信息

提供频率与周期量测 在高频与低频，均具高解析度 频率范围：0.01Hz～1.3GHz 高感度：10mVrms 1Hz 档解析度：100nHz 可调式触发准位控制 显示锁定功能显示8 位数 with Hz, kHz, MHz, GHz, S, mS, µS, nS and overflowGate TimeContinuously vary from 10mS to 10S, or 1 period of input depending on whichever is greater准确度±(Resolution ±Timebase error)频道 A范围DC 耦合 0.01Hz～120MHz；AC 耦合 30Hz～120MHz感度10mVrms typical； 50mVrms max耦合AC or DC switchable滤波器Low pass, switchable in or out for channel A.-3dB point of nominally 100kHz阻抗1MΩ//40pF衰减器x 20dB触发准位调整-2.5 VDC to +2.5 VDC解析度The maximum resolution for frequency measurement is 100nHz for 1Hz and 0.1Hz for 100MHz input respectively, and for periPeriod8nS to 100S at least 7 digits displayedRangefor per second of gate time频道 B :范围50MHz to 1.3GHz感度≤40mVrms (10mVrms typical)耦合AC only时基Aging Rate1 ppm, per Month温度5 ppm 23°C ±5°C电源变化±0.005 ppm for ±10% 变化使用电源AC 100V/120V/220V/240V ±10%, 50/60Hz