數位型數字頻率計數器 , 主要規格:0.01hz ~ 1.3ghz 特點 ? 提供頻率與週期量測 ?在高頻與低頻，均具高解析度 ?頻率範圍：0.01hz ~ 2.7ghz ? 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 規格 顯示 ? 8 位數 with hz, khz, mhz, ghz, s, ms, μs, and overflow gate time ? continuously vary from 10ms to 10s, or 1 period of input depending on whichever is greater 準確度 ?+(resolution+timebase error) 頻道 a 範圍 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 1mω40pf 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 100mhzinput respectively, and for period measurement is 10 for 1hz and 0.1fs (f=10-15) for 100mhz input respectively.at least 7,6,5 digits are display for 1s, 100ms, 10ms gate time respectively period range 8 to 100s at least 7 digits displayed for per second of gate time 頻道 b 範圍 50mhz to 2.7ghz 感度