率数据,方便长期监控外部频率变化。通道 2 更是能测高达 6GHz 的频率。内置 OCXO,也可以外接 10M 基准。 FA-2 frequency counter is high precision,high speed ,with statis function,auto statis input frequency, It is convenient for long-term monitoring of external frequency changes. Channel 2 can measure frequencies up to 6 GHz. Built-in OCXO,...
四,设备安装,使用,install used 4.1 设备后面板,rear panel 设备面板,rear panel 1,10M 基准输入和输出, 10MHz frequency standard input and output 2,USB 口,内部使用 FT232rl 芯片,USB 驱动可以从 FTDI 网站获取 USB port,inside is ft232rl chip,usb driver can downlaod from ftdi web site 3,内部 OCXO 频率调节 Inside OCXO frequency adjust 4,电源开关...
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1,通道 1 输入功率 CH1 input power 2,频率显示区 Frequency display area 3,测量单位 Units 4,闸门时间,0.1 秒,1 秒,10 秒 Gate time,0.1S,1S,10S 5,内部还是外部基准 Inside/outside frequency standard 6,CH1 输入阻抗,1MR/50R CH1 input impedance,1MR/50R 7,闸门状态,显示*表示闸门打开,否则闸门关闭 Gate state,display * means gate is open,else gate closed...
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8,显示 P 表示高精度测量模式, Display P means high precison mode 9,150K 低通滤波器 150KHz LPF 通道 1 统计模式,channel statis mode 1,统计点数,1-4000000000,statis points. 2,当前频率,now test frequency 3,平均值,average value 4,最大值,max value 5,最小值,min value 6,峰峰值,peak-peak value 7,输入阻抗,50R 或者 1MR,input impendence,50OHM OR 1MOHM 8,基准采用内部还是外部,std is inside or extern 9,闸门时间...
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1,当前频率,now frequency 2,基准选择,std select 3,闸门时间,gate times *P 可以参考通道 1 频率测量模式 *P reference for CH1 FREQ mode 通道 2 统计模式,channel 2 statis mode...
参考通道 1 统计模式,reference channel 1 statis mode 和电脑连线, Connect PC USB 打印口直连电脑,芯片是 FT232RL,可以在网上搜索驱动 Usb print port connect to PC,usb chip is ft232rl,can search in web. 4.5,USB 口配置指令,config command 默认波特率 9600BPS,采用 ASCII 通信, Default bauard is 9600bps,used ascii code $R*按下复位按键,操作成功,返回 KEY RST ROK<CR><LF> $R*press RST key,return KEY RST ROK<CR><LF>...
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$E2020* power up select CH1 frequency mode $E2121* 开机选择 CH1 统计模式, $E2121*power up select CH1 frequency statis mode $E2222* 开机选择 CH2 频率模式, $E2222* power up select CH2 frequency mode $E2323* 开机选择 CH2 统计模式 $E2323*power up select CH2 frequency statis mode $E3030* CH1 选择...
六,常见问题问答 FAQ 问:如何判断机器是好的 Q : how can I know the machine is good. 答:将后面 10M 输出,接到 CH1,频率应该显示在 10M,表示机器良好 A : connect front panel 10M to rear panel CH1,LCD will display 10M means counter is good. 问:测量低频频率跳动,测量不准确,怎么办 Q:test low frequecny ,freqnency is not accuary,how to do 答:打开低通滤波器...
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