頻率計，數字頻率計，GFC-80的詳細信息

提供頻率與周期量測 在高頻與低頻，均具高解析度 頻率范圍：0.01Hz～1.3GHz 高感度：10mVrms 1Hz 檔解析度：100nHz 可調式觸發準位控制 顯示鎖定功能顯示8 位數 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準確度±(Resolution ±Timebase error)頻道 A范圍DC 耦合 0.01Hz～120MHz；AC 耦合 30Hz～120MHz感度10mVrms typical； 50mVrms max耦合AC or DC switchable濾波器Low pass, switchable in or out for channel A.-3dB point of nominally 100kHz阻抗1MΩ//40pF衰減器x 20dB觸發準位調整-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頻道 B :范圍50MHz to 1.3GHz感度≤40mVrms (10mVrms typical)耦合AC only時基Aging Rate1 ppm, per Month溫度5 ppm 23°C ±5°C電源變化±0.005 ppm for ±10% 變化使用電源AC 100V/120V/220V/240V ±10%, 50/60Hz