&lt;!-- .at_39{BORDER-RIGHT: windowtext 1pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: #d4d0c8; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: #d4d0c8; WIDTH: 369pt; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 1pt solid; HEIGHT: 14.5pt; BACKGROUND-COLOR: transparent; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt} .at_17{MARGIN: 0cm -0.05pt 0pt 0cm; LINE-HEIGHT: 13.5pt; TEXT-ALIGN: left; mso-pagination: widow-orphan} .at_26{FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: Arial; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体} .at_36{mso-yfti-irow: 8} .at_16{BORDER-RIGHT: windowtext 1pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: #d4d0c8; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: #d4d0c8; WIDTH: 369pt; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 1pt solid; BACKGROUND-COLOR: transparent; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt} .at_43{mso-yfti-irow: 11; mso-yfti-lastrow: yes} .at_31{MARGIN: 0cm -0.05pt 0pt 0cm; LINE-HEIGHT: 13.5pt; TEXT-ALIGN: left; mso-pagination: widow-orphan; tab-stops: 174.6pt} .at_35{BORDER-RIGHT: windowtext 1pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: #d4d0c8; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: #d4d0c8; WIDTH: 369pt; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 1pt solid; HEIGHT: 11.7pt; BACKGROUND-COLOR: transparent; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt} .at_1{FONT-SIZE: 9pt; COLOR: red; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体} .at_6{BORDER-RIGHT: medium none; BORDER-TOP: medium none; MARGIN: auto auto auto 5.4pt; BORDER-LEFT: medium none; BORDER-BOTTOM: medium none; BORDER-COLLAPSE: collapse; mso-border-alt: solid windowtext .5pt; mso-yfti-tbllook: 480; mso-padding-alt: 0cm 5.4pt 0cm 5.4pt; mso-border-insideh: .5pt solid windowtext; mso-border-insidev: .5pt solid windowtext} .at_37{HEIGHT: 14.5pt; mso-yfti-irow: 9} .at_25{BORDER-RIGHT: windowtext 1pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: #d4d0c8; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: #d4d0c8; WIDTH: 369pt; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 1pt solid; HEIGHT: 12.7pt; BACKGROUND-COLOR: transparent; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt} .at_29{BORDER-RIGHT: windowtext 1pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: #d4d0c8; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: #d4d0c8; WIDTH: 369pt; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 1pt solid; HEIGHT: 12.85pt; BACKGROUND-COLOR: transparent; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt} .at_19{FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-ascii-font-family: Arial; mso-hansi-font-family: Arial} .at_22{mso-yfti-irow: 2} .at_34{BORDER-RIGHT: windowtext 1pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: #d4d0c8; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: windowtext 1pt solid; WIDTH: 126pt; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 1pt solid; HEIGHT: 11.7pt; BACKGROUND-COLOR: transparent; mso-border-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt} .at_8{BORDER-RIGHT: windowtext 1pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: windowtext 1pt solid; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: windowtext 1pt solid; WIDTH: 126pt; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 1pt solid; BACKGROUND-COLOR: transparent; mso-border-alt: solid windowtext .5pt} .at_4{FONT-SIZE: 9pt; COLOR: black; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体} .at_41{FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-ascii-font-family: Arial; mso-bidi-font-family: 'Arial Unicode MS'; mso-hansi-font-family: Arial} .at_30{mso-yfti-irow: 5} .at_3{FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-ascii-font-family: 'Times New Roman'; mso-bidi-font-family: 宋体; mso-hansi-font-family: 'Times New Roman'} .at_38{BORDER-RIGHT: windowtext 1pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: #d4d0c8; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: windowtext 1pt solid; WIDTH: 126pt; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 1pt solid; HEIGHT: 14.5pt; BACKGROUND-COLOR: transparent; mso-border-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt} .at_15{MARGIN: 0cm 0cm 0pt; LINE-HEIGHT: 13.5pt; TEXT-ALIGN: left} .at_9{FONT-SIZE: 9pt; COLOR: red; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-ascii-font-family: 'Times New Roman'; mso-bidi-font-family: 宋体; mso-hansi-font-family: 'Times New Roman'} .at_5{FONT-SIZE: 10pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体} .at_10{BORDER-RIGHT: windowtext 1pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: windowtext 1pt solid; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: #d4d0c8; WIDTH: 369pt; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 1pt solid; BACKGROUND-COLOR: transparent; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt} .at_27{FONT-SIZE: 12pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体} .at_42{mso-yfti-irow: 10} .at_40{FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: Arial; mso-font-kerning: 0pt; mso-bidi-font-family: 'Arial Unicode MS'} .at_28{HEIGHT: 12.85pt; mso-yfti-irow: 4} .at_24{BORDER-RIGHT: windowtext 1pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: #d4d0c8; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: windowtext 1pt solid; WIDTH: 126pt; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 1pt solid; HEIGHT: 12.7pt; BACKGROUND-COLOR: transparent; mso-border-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt} .at_21{FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-ascii-font-family: Arial; mso-bidi-font-family: 宋体; mso-hansi-font-family: Arial} .at_7{mso-yfti-irow: 0; mso-yfti-firstrow: yes} .at_33{HEIGHT: 11.7pt; mso-yfti-irow: 7} .at_18{FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: Arial; mso-font-kerning: 0pt; mso-bidi-font-family: 'Times New Roman'} .at_32{mso-yfti-irow: 6} .at_12{FONT-SIZE: 9pt; COLOR: red; mso-font-kerning: 0pt} .at_23{HEIGHT: 12.7pt; mso-yfti-irow: 3} .at_14{BORDER-RIGHT: windowtext 1pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: #d4d0c8; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: windowtext 1pt solid; WIDTH: 126pt; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 1pt solid; BACKGROUND-COLOR: transparent; mso-border-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt} .at_0{MARGIN: 0cm 0cm 0pt; LINE-HEIGHT: 13.5pt; TEXT-ALIGN: left; mso-pagination: widow-orphan} .at_13{mso-yfti-irow: 1} .at_20{mso-spacerun: yes} .at_11{FONT-SIZE: 9pt; COLOR: red; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体} .at_2{FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体} --&gt;特点：1、8位LED显示；2、频率测量、周期测量；3、闸门时间可连续调；4、超低频等精度测量；5、输入衰减器、AC/DC耦合选择；6、自动恒温晶体频率基准。 基本功能VC3165频率测量 A通道测量范围：0.01Hz-50MHz                基本精度±(2×10-5＋3)B通道测量范围：50MHz-2.4GHz               基本精度±(2×10-5＋3)周期测量 A通道测量范围：0.02uS~10S                  灵敏度80mVrms>1SB通道测量范围：0. 5nS~0.02uS               灵敏度500mVrms<1S周期测量范围0.5nS~10S闸门调节范围100mS~10S 连续可调衰减器衰减量20dB输入阻抗1MΩ体积270×215×100mm重量约1.6kg电源适用范围AC 220V/110V 50Hz/60Hz