什么叫锁相环 爱问知识人.mht

辛苦收集频率测试和同步方面的资料

width=3D145=20
border=3D0></A></DIV>
<DIV class=3D"fl hd2">
<DIV style=3D"Z-INDEX: 1; BACKGROUND: #fff; POSITION: relative">
<FORM id=3DzsForm name=3DzsForm onsubmit=3D"return =
iask_submit(this,'know');"=20
method=3Dget target=3D"">
<DIV class=3Dfl><INPUT class=3D"f14 w277" id=3Dkey =
onclick=3Dckwords(this);=20
name=3Dkey></DIV>
<DIV class=3Dfl=20
style=3D"PADDING-RIGHT: 0px; PADDING-LEFT: 10px; PADDING-BOTTOM: 0px; =
PADDING-TOP: 2px"><INPUT class=3Dhd_ss onmouseover=3Dss_on(2); =
onmouseout=3Dss_of(1); type=3Dsubmit value=3D"=CB=D1 =CB=F7"></DIV>
<DIV class=3Dfl=20
style=3D"PADDING-RIGHT: 10px; PADDING-LEFT: 0px; PADDING-BOTTOM: 0px; =
PADDING-TOP: 2px"><IMG=20
class=3Dcp id=3Dz2ss_r onmouseover=3Dss_on(3);=20
onclick=3D"this.src=3D'http://image2.sina.com.cn/pfp/iask/zsr/z2_ss_r4.gi=
f';fShow();"=20
onmouseout=3Dss_of(1); height=3D20=20
src=3D"http://image2.sina.com.cn/pfp/iask/zsr/z2_ss_r1.gif" width=3D17=20
border=3D0></DIV>
<DIV class=3Dfl style=3D"PADDING-TOP: 2px"><INPUT class=3Dhd_tw =
onclick=3D"return iask_submit(this.form,'ask');" type=3Dbutton =
value=3D"=CC=E1 =CE=CA"></DIV>
<DIV class=3Dcb></DIV><INPUT type=3Dhidden name=3Dtitle> <INPUT =
type=3Dhidden value=3D0=20
name=3Dclassid> <INPUT type=3Dhidden value=3D1 name=3Dtype> <INPUT =
type=3Dhidden value=3D0=20
name=3Dgjss> <INPUT type=3Dhidden value=3D0 name=3Dpage> =
</FORM></DIV></DIV>
<DIV class=3Dfr=20
style=3D"PADDING-RIGHT: 5px; PADDING-LEFT: 5px; PADDING-BOTTOM: 5px; =
PADDING-TOP: 5px"><A=20
title=3D=B0=AE=CE=CA=CA=D7=D2=B3 =
href=3D"http://iask.com/">=B0=AE=CE=CA=CA=D7=D2=B3</A> <SPAN =
class=3Dc9>|</SPAN> <A=20
title=3D=D6=AA=CA=B6=C8=CB=CA=D7=D2=B3 =
href=3D"http://iask.sina.com.cn/">=D6=AA=CA=B6=C8=CB=CA=D7=D2=B3</A> =
</DIV>
<DIV class=3Dcb></DIV></DIV>
<DIV id=3Dnav>
<DIV class=3Dfl>|</DIV>
<DIV class=3Dfl style=3D"WIDTH: 52px"><A=20
href=3D"http://iask.sina.com.cn/">=CA=D7=D2=B3</A></DIV>
<DIV class=3Dfl><IMG height=3D29 =
src=3D"http://www.sinaimg.cn/pfp/i/z3/v2_nav_l.gif"=20
width=3D2></DIV>
<DIV class=3D"fl nav_n" style=3D"WIDTH: =
78px">=CE=CA=CC=E2=B7=D6=C0=E0</DIV>
<DIV class=3Dfl><IMG height=3D29 =
src=3D"http://www.sinaimg.cn/pfp/i/z3/v2_nav_r.gif"=20
width=3D2></DIV>
<DIV class=3Dfl style=3D"WIDTH: 91px"><A=20
href=3D"http://iask.sina.com.cn/rank/browse_question_by_rank.php">=CE=CA=CC=
=E2=C5=C5=D0=D0=B0=F1</A></DIV>
<DIV class=3Dfl>|</DIV>
<DIV class=3Dfl style=3D"WIDTH: 65px"><A=20
href=3D"http://iask.sina.com.cn/toplist/toplist.php">=D3=C3=BB=A7=B0=F1</=
A></DIV>
<DIV class=3Dfl>|</DIV>
<DIV class=3Dfl style=3D"WIDTH: 65px"><A=20
href=3D"http://iask.sina.com.cn/info/all_expert.html">=D7=A8=BC=D2=CD=C5<=
/A></DIV>
<DIV class=3Dfl>|</DIV>
<DIV class=3Dfl style=3D"WIDTH: 65px"><A =
href=3D"http://iask.com/more.html">=B8=FC=B6=E0<SPAN=20
class=3Df10>&gt;&gt;</SPAN></A></DIV>
<DIV class=3Dfr style=3D"PADDING-TOP: 4px"><A=20
href=3D"http://iask.sina.com.cn/myknow/my_question_list.php"><IMG =
height=3D19=20
src=3D"http://image2.sina.com.cn/pfp/ask/images/zhishi/grzx.gif" =
width=3D78=20
border=3D0></A></DIV>
<DIV class=3Dcb></DIV></DIV>
<DIV id=3Dnav_sub style=3D"MARGIN: 0px auto; WIDTH: 950px">
<DIV class=3Dnav22><A =
href=3D"http://iask.sina.com.cn/">=D6=AA=CA=B6=C8=CB</A> &gt; <A=20
href=3D"http://iask.sina.com.cn/browse/catalog.php">=CE=CA=CC=E2=B7=D6=C0=
=E0</A> &gt; <A=20
href=3D"http://iask.sina.com.cn/browse/get_class.php?fatherid=3D1">=B5=E7=
=C4=D4=A1=A2=CD=A8=D1=B6=A1=A2=BB=A5=C1=AA=CD=F8</A>=20
&gt; <A =
href=3D"http://iask.sina.com.cn/browse/get_class.php?fatherid=3D27">=C8=ED=
=BC=FE</A>=20
&gt; <A=20
href=3D"http://iask.sina.com.cn/browse/get_class.php?fatherid=3D30">=CD=F8=
=C2=E7=C8=ED=BC=FE</A></DIV>
<DIV id=3Dsina_ad1 style=3D"FLOAT: left; WIDTH: 190px; HEIGHT: 24px"=20
sectionid=3D"IASK-ZSR-A" name=3D"sina_ads"></DIV>
<DIV class=3Dcb style=3D"MARGIN-TOP: -10px"></DIV></DIV>
<DIV id=3Dmain>
<DIV id=3Dcont_left>
<DIV class=3Dcl_qus>
<DIV class=3Dqus_t>
<DIV class=3D"f14 fl"><STRONG>=CE=CA=CC=E2:</STRONG></DIV>
<DIV class=3Dplsz><A class=3Dc9=20
onclick=3D"openWindow('/question/recommend_cute_question_new.php?question=
id=3D6511381','470', '350','=CD=C6=BC=F6=CE=CA=CC=E2'); return false;"=20
href=3D"http://iask.sina.com.cn/b/6511381.html?from=3Drelated#">=CD=C6=BC=
=F6</A> =A9=AE <A class=3Dc9=20
onclick=3D"openWindow('/myknow/myfocus_new_question.php?qid=3D6511381', =
'280', '140', '=B9=D8=D7=A2');return false;"=20
href=3D"http://iask.sina.com.cn/b/6511381.html?from=3Drelated#">=B9=D8=D7=
=A2</A> =A9=AE <A class=3Dc9=20
href=3D"javascript:OpenSection('6511381','');">=C6=C0=C2=DB</A> <SPAN =
id=3Dzsjbzj>=A9=AA <A=20
class=3Dc9=20
onclick=3D"openWindow('/question/315_new.php?uid=3D1254807404&amp;questio=
nid=3D6511381', '470', '350', '=BE=D9=B1=A8');return false;"=20
href=3D"http://iask.sina.com.cn/b/6511381.html?from=3Drelated#">=BE=D9=B1=
=A8</A></SPAN> </DIV>
<DIV class=3Dcr></DIV></DIV>
<DIV class=3Dqusi><IMG alt=3D=CE=CA=CC=E2logo=20
src=3D"http://www.sinaimg.cn/pfp/i/z3/ques.gif"></DIV>
<DIV class=3Dqus_c>
<DIV class=3Dusr_info>
<DIV class=3Dwpb5><A class=3Dc7f=20
href=3D"http://iask.sina.com.cn/user/user.php?uid=3D1254807404" =
target=3D_blank><IMG=20
class=3Dimg1 id=3Dq1254807404 =
align=3DabsMiddle><BR>=CB=E6=B7=E7=B6=F8=C8=A5</A><BR>[=D0=C2=CA=D6]</DIV=
></DIV>
<DIV class=3Dusr_qus><IMG alt=3D=D2=D1=BD=E2=BE=F6=B5=C4=CE=CA=CC=E2=20
src=3D"http://image2.sina.com.cn/pfp/ask/images/zhishi/ssr52a.gif"=20
align=3DabsMiddle> <STRONG>=CA=B2=C3=B4=BD=D0=CB=F8=CF=E0=BB=B7</STRONG> =
<SPAN id=3Dzsqprize><IMG=20
src=3D"http://image2.sina.com.cn/pfp/ask/images/zhishi/money.gif"=20
align=3DabsMiddle><STRONG class=3Do>0=B7=D6</STRONG></SPAN>
<SCRIPT language=3Djavascript>s_b("zsjbzj", 3, 3, 3, =
3,4);show_img("q1254807404");if(0=3D=3D0)show_hidden("zsqprize",0);</SCRI=
PT>
=20
<DIV class=3Dtwsj style=3D"TEXT-ALIGN: left">=BB=D8=B4=F0=A3=BA1 &nbsp; =
=E4=AF=C0=C0=A3=BA319 &nbsp; =CC=E1=CE=CA=CA=B1=BC=E4=A3=BA<SPAN=20
class=3Dar>2006-09-28 14:31</SPAN></DIV>
<DIV class=3Dpb5></DIV>
<DIV class=3D"f12 c7f" id=3Dcomment6511381 style=3D"DISPLAY: none"><SPAN =
class=3Dpl_hand=20
onclick=3D"OpenSection('6511381','');"><IMG class=3Dcp =
id=3Dcommentimg6511381 height=3D8=20
src=3D"http://image2.sina.com.cn/pfp/i/z2/z2_zz_fbpl_da2.gif" width=3D7> =
=B9=B2<SPAN=20
id=3Dcommenttotal6511381>0</SPAN>=CC=F5=C6=C0=C2=DB...</SPAN></DIV>
<DIV class=3Dpl_area id=3Dcommentsec6511381></DIV></DIV>
<DIV class=3Dcb></DIV></DIV></DIV>
<DIV class=3Dcl_ans2>
<DIV class=3Dans_t3>
<DIV class=3Dfl id=3Dok1189795960><IMG alt=3D=D7=EE=BC=D1=B4=F0=B0=B8=20
src=3D"http://www.sinaimg.cn/pfp/i/z3/best.gif" align=3DabsMiddle> =
<STRONG=20
class=3Df14>=D7=EE=BC=D1=B4=F0=B0=B8</STRONG> <SPAN class=3D"f12 =
c9">=B4=CB=B4=F0=B0=B8=D3=C9=CC=E1=CE=CA=D5=DF=D7=D4=BC=BA=D1=A1=D4=F1=A3=
=AC=B2=A2=B2=BB=B4=FA=B1=ED=B0=AE=CE=CA=D6=AA=CA=B6=C8=CB=B5=C4=B9=DB=B5=E3=
</SPAN>=20
</DIV>
<DIV class=3Dplsz><A class=3Dc9=20
onclick=3D"openWindow('/question/emend_apply_new.php?questionid=3D6511381=
', '470', '350', '=CE=D2=C0=B4=BE=BE=B4=ED');return false"=20
href=3D"http://iask.sina.com.cn/b/6511381.html?from=3Drelated#">=BE=BE=B4=
=ED</A> =A9=AA <A class=3Dc9=20
href=3D"javascript:OpenSection('6511381','24904333');">=C6=C0=C2=DB</A> =
<SPAN=20
id=3Dzsjubaowet1189795960>=A9=AA <A class=3Dc9=20
onclick=3D"openWindow('/question/315_new.php?uid=3D1189795960&amp;questio=
nid=3D6511381&amp;answerid=3D24904333', '470', '350', =
'=BE=D9=B1=A8');return false;"=20
href=3D"http://iask.sina.com.cn/b/6511381.html?from=3Drelated#">=BE=D9=B1=
=A8</A></SPAN>
<SCRIPT language=3Djavascript>s_b("zsjubaowet1189795960", 3, 3, 3, 3,5, =
1189795960);</SCRIPT>
 </DIV>
<DIV class=3Dcb></DIV></DIV>
<DIV class=3Dqus_c2>
<DIV class=3Dusr_info>
<DIV class=3Dwpb5><A name=3D#1189795960></A><A class=3Dc7f=20
href=3D"http://iask.sina.com.cn/user/user.php?uid=3D1189795960" =
target=3D_blank><IMG=20
class=3Dimg1 id=3Da1189795960 =
align=3DabsMiddle><BR>=C1=E3=BE=E0=C0=EB</A><BR>[=CF=C8=D6=AA]
<SCRIPT language=3Djavascript>show_img("a1189795960");</SCRIPT>
 </DIV></DIV>
<DIV class=3Dusr_qus>
<DIV =
class=3Dpb5>=CB=F8=CF=E0=BB=B7=CA=C7=D6=B8=D2=BB=D6=D6=B5=E7=C2=B7=BB=F2=D5=
=DF=C4=A3=BF=E9=A3=AC=CB=FC=D3=C3=D3=DA=D4=DA=CD=A8=D0=C5=B5=C4=BD=D3=CA=D5=
=BB=FA=D6=D0=A3=AC=C6=E4=D7=F7=D3=C3=CA=C7=B6=D4=BD=D3=CA=D5=20
<BR>=B5=BD=B5=C4=D0=C5=BA=C5=BD=F8=D0=D0=B4=A6=C0=ED=A3=AC=B2=A2=B4=D3=C6=
=E4=D6=D0=CC=E1=C8=A1=C4=B3=B8=F6=CA=B1=D6=D3=B5=C4=CF=E0=CE=BB=D0=C5=CF=A2=
=A1=A3=BB=F2=D5=DF=CB=B5=A3=AC=B6=D4=D3=DA=BD=D3=CA=D5 =
<BR>=B5=BD=B5=C4=D0=C5=BA=C5=A3=AC=B7=C2=D6=C6=D2=BB=B8=F6=CA=B1=D6=D3=D0=
=C5=BA=C5=A3=AC=CA=B9=B5=C3=D5=E2=C1=BD=B8=F6=D0=C5=BA=C5=B4=D3=C4=B3=D6=D6=
=BD=C7=B6=C8=C0=B4=BF=B4=CA=C7=CD=AC=B2=BD=B5=C4=A3=A8=20
<BR>=BB=F2=D5=DF=CB=B5=A3=AC=CF=E0=B8=C9=B5=C4=A3=A9=A1=A3 =
<BR><BR>=D3=C9=D3=DA=CB=F8=B6=A8=C7=E9=D0=CE=CF=C2=A3=A8=BC=B4=CD=EA=B3=C9=
=B2=B6=D7=BD=BA=F3=A3=A9=A3=AC=B8=C3=B7=C2=D6=C6=B5=C4=CA=B1=D6=D3=D0=C5=BA=
=C5=CF=E0=B6=D4=D3=DA=BD=D3=CA=D5=B5=BD=B5=C4=D0=C5=BA=C5=20
<BR>=D6=D0=B5=C4=CA=B1=D6=D3=D0=C5=BA=C5=BE=DF=D3=D0=D2=BB=B6=A8=B5=C4=CF=
=E0=B2=EE=A3=AC=CB=F9=D2=D4=BA=DC=D0=CE=CF=F3=B5=D8=B3=C6=C6=E4=CE=AA=CB=F8=
=CF=E0=C6=F7=A1=A3 =
<BR><BR>=B6=F8=D2=BB=B0=E3=C7=E9=D0=CE=CF=C2=A3=AC=D5=E2=D6=D6=CB=F8=CF=E0=
=BB=B7=B5=C4=C8=FD=B8=F6=D7=E9=B3=C9=B2=BF=B7=D6=BA=CD=CF=E0=D3=A6=B5=C4=D4=
=CB=D7=F7=BB=FA=C0=ED=CA=C7=A3=BA <BR><BR>1=20
=BC=F8=CF=E0=C6=F7=A3=BA=D3=C3=D3=DA=C5=D0=B6=CF=CB=F8=CF=E0=C6=F7=CB=F9=CA=
=E4=B3=F6=B5=C4=CA=B1=D6=D3=D0=C5=BA=C5=BA=CD=BD=D3=CA=D5=D0=C5=BA=C5=D6=D0=
=B5=C4=CA=B1=D6=D3=B5=C4=CF=E0=B2=EE=B5=C4=B7=F9=B6=C8=A3=BB <BR><BR>2=20
=BF=C9=B5=F7=CF=E0/=B5=F7=C6=B5=B5=C4=CA=B1=D6=D3=B7=A2=C9=FA=C6=F7=C6=F7=
=A3=BA=D3=C3=D3=DA=B8=F9=BE=DD=BC=F8=CF=E0=C6=F7=CB=F9=CA=E4=B3=F6=B5=C4=D0=
=C5=BA=C5=C0=B4=CA=CA=B5=B1=B5=C4=B5=F7=BD=DA=CB=F8=CF=E0=C6=F7 =
<BR>=C4=DA=B2=BF=B5=C4=CA=B1=D6=D3=CA=E4=B3=F6=D0=C5=BA=C5=B5=C4=C6=B5=C2=
=CA=BB=F2=D5=DF=CF=E0=CE=BB=A3=AC=CA=B9=B5=C3=CB=F8=CF=E0=C6=F7=CD=EA=B3=C9=
=C9=CF=CA=F6=B5=C4=B9=CC=B6=A8=CF=E0=B2=EE=B9=A6=C4=DC=A3=BB=20
<BR><BR>3 =
=BB=B7=C2=B7=C2=CB=B2=A8=C6=F7=A3=BA=D3=C3=D3=DA=B6=D4=BC=F8=CF=E0=C6=F7=B5=
=C4=CA=E4=B3=F6=D0=C5=BA=C5=BD=F8=D0=D0=C2=CB=B2=A8=BA=CD=C6=BD=BB=AC=A3=AC=
=B4=F3=B6=E0=CA=FD=C7=E9=D0=CE=CF=C2=CA=C7=D2=BB=B8=F6=B5=CD=CD=A8=20
<BR>=C2=CB=B2=A8=C6=F7=A3=AC=D3=C3=D3=DA=C2=CB=B3=FD=D3=C9=D3=DA=CA=FD=BE=
=DD=B5=C4=B1=E4=BB=AF=BA=CD=C6=E4=CB=FB=B2=BB=CE=C8=B6=A8=D2=F2=CB=D8=B6=D4=
=D5=FB=B8=F6=C4=A3=BF=E9=B5=C4=D3=B0=CF=EC=A1=A3 =
<BR><BR>=B4=D3=C9=CF=BF=C9=D2=D4=BF=B4=B3=F6=A3=AC=B4=F3=D6=C2=D3=D0=C8=E7=
=CF=C2=BF=F2=CD=BC=A3=BA=20
<BR><BR><BR><BR>=A1=A1=A1=A1=A9=B0=A9=A4=A9=A4=A9=A4=A9=A4=A9=A4=A9=B4=A1=
=A1=A1=A1=A1=A1=A9=B0=A9=A4=A9=A4=A9=A4=A9=A4=A9=A4=A9=B4=A1=A1=A1=A1=A1=A1=
=A9=B0=A9=A4=A9=A4=A9=A4=A9=A4=A9=A4=A9=A4=A9=A4=A9=B4=A1=A1=A1=A1=A1=A1 =

<BR>=A1=FA=A9=A4=A9=C8=A1=A1=BC=F8=CF=E0=C6=F7=A1=A1=A9=C0=A9=A4=A1=FA=A9=
=A4=A9=C8=BB=B7=C2=B7=C2=CB=B2=A8=C6=F7=A9=C0=A9=A4=A1=FA=A9=A4=A9=C8=CA=DC=
=BF=D8=CA=B1=D6=D3=B7=A2=C9=FA=C6=F7=A9=C0=A1=FA=A9=D0=A9=A4=A1=FA =
<BR>=A1=A1=A1=A1=A9=B8=A9=A4=A9=A4=A9=D0=A9=A4=A9=A4=A9=BC=A1=A1=A1=A1=A1=
=A1=A9=B8=A9=A4=A9=A4=A9=A4=A9=A4=A9=A4=A9=BC=A1=A1=A1=A1=A1=A1=A9=B8=A9=A4=
=A9=A4=A9=A4=A9=A4=A9=A4=A9=A4=A9=A4=A9=BC=A1=A1=A9=A6=A1=A1=A1=A1=A1=A1 =

<BR>=A1=A1=A1=A1=A1=A1=A1=A1=A1=A1=A1=FC=A1=A1=A1=A1=A1=A1=A1=A1=A1=A1=A1=
=A1=A1=A1=A1=A1=A1=A1=A1=A1=A1=A1=A1=A1=A1=A1=A1=A1=A1=A1=A1=A1=A1=A1=A1=A1=
=A1=A1=A1=A1=A1=A1=A1=A1=A1=A1=A1=A1=A1=A1=A1=A1=A1=FD =
<BR>=A1=A1=A1=A1=A1=A1=A1=A1=A1=A1=A9=B8=A9=A4=A9=A4=A9=A4=A9=A4=A9=A4=A9=
=A4=A9=A4=A9=A4=A9=A4=A9=A4=A9=A4=A9=A4=A9=A4=A9=A4=A9=A4=A9=A4=A9=A4=A9=A4=
=A9=A4=A9=A4=A9=A4=A9=A4=A9=A4=A9=A4=A9=A4=A9=A4=A9=BC=20
<BR><BR>=BF=C9=BC=FB=A3=AC=CA=C7=D2=BB=B8=F6=B8=BA=B7=B4=C0=A1=BB=B7=C2=B7=
=BD=E1=B9=B9=A3=AC=CB=F9=D2=D4=D2=BB=B0=E3=B3=C6=CE=AA=CB=F8=CF=E0=BB=B7=A3=
=A8PLL: Phase Locking Loop=A3=A9=20
<BR><BR>=CB=F8=CF=E0=BB=B7=D3=D0=BA=DC=B6=E0=D6=D6=C0=E0=A3=AC=BF=C9=D2=D4=
=CA=C7=CA=FD=D7=D6=B5=C4=D2=B2=BF=C9=D2=D4=CA=C7=C4=A3=C4=E2=B5=C4=D2=B2=BF=
=C9=D2=D4=CA=C7=BB=EC=BA=CF=B5=C4=A3=AC=BF=C9=D2=D4=D3=C3=D3=DA=BB=D6=B8=B4=
=D4=D8=B2=A8 =
<BR>=D2=B2=BF=C9=D2=D4=D3=C3=D3=DA=BB=D6=B8=B4=BB=F9=B4=F8=D0=C5=BA=C5=CA=
=B1=D6=D3. <BR></DIV>
<DIV class=3Dtwsj>=BB=D8=B4=F0=A3=BA<SPAN class=3Dar>2006-09-28 =
14:35</SPAN></DIV>
<DIV class=3Df12=20
style=3D"BORDER-TOP: #feeba0 1px solid; MARGIN-BOTTOM: 10px; =