哈哈哈，经过一番调整，我的阻抗曲线好多了

cbb22

这是以前测量的阻抗图：

哈哈哈，经过一番调整，我的阻抗曲线好多了

这是调整以后测出的阻抗曲线：

哈哈哈，经过一番调整，我的阻抗曲线好多了

比以前好多了，但锯齿现象还是有，不知对T/S参数的测量影响大不大？

cbb22

你们用的声卡是什么型号的？

1999

以下是引用维卡亚在2005-3-28 12:30:00的发言：

一般出现这种曲线我会检查连线，曲线是不对的

cbb22

应该是44.1K

芦苇

cbb22

1、<img src="attachments/dvbbs/2005-3/200532822757997.jpg" border="0" onload="if(this.width>screen.width*0.7) {this.resized=true; this.width=screen.width*0.7; this.alt=\'Click here to open new window\nCTRL+Mouse wheel to zoom in/out\';}" onmouseover="if(this.width>screen.width*0.7) {this.resized=true; this.width=screen.width*0.7; this.style.cursor=\'hand\'; this.alt=\'Click here to open new window\nCTRL+Mouse wheel to zoom in/out\';}" onclick="if(!this.resized) {return true;} else {window.open(\'attachments/dvbbs/2005-3/200532822757997.jpg\');}" onmousewheel="return imgzoom(this);" alt="" />
2、<img src="attachments/dvbbs/2005-3/200532822822831.jpg" border="0" onload="if(this.width>screen.width*0.7) {this.resized=true; this.width=screen.width*0.7; this.alt=\'Click here to open new window\nCTRL+Mouse wheel to zoom in/out\';}" onmouseover="if(this.width>screen.width*0.7) {this.resized=true; this.width=screen.width*0.7; this.style.cursor=\'hand\'; this.alt=\'Click here to open new window\nCTRL+Mouse wheel to zoom in/out\';}" onclick="if(!this.resized) {return true;} else {window.open(\'attachments/dvbbs/2005-3/200532822822831.jpg\');}" onmousewheel="return imgzoom(this);" alt="" />

区别是后者使用了1/24滤波。

大家帮忙分析一下，为什么纯电阻测出来有波浪，高频段的毛刺也较多？和声卡有关系么？还是我的装配手艺不到家？

q78889

喇叭是西雅士的H702,和官方给出的参数是一模一样,所以JustMLS测阻抗的准确度还是很好的!!!<img src="attachments/dvbbs/2005-3/2005328183653561.gif" border="0" onload="if(this.width>screen.width*0.7) {this.resized=true; this.width=screen.width*0.7; this.alt=\'Click here to open new window\nCTRL+Mouse wheel to zoom in/out\';}" onmouseover="if(this.width>screen.width*0.7) {this.resized=true; this.width=screen.width*0.7; this.style.cursor=\'hand\'; this.alt=\'Click here to open new window\nCTRL+Mouse wheel to zoom in/out\';}" onclick="if(!this.resized) {return true;} else {window.open(\'attachments/dvbbs/2005-3/2005328183653561.gif\');}" onmousewheel="return imgzoom(this);" alt="" />

芦苇

有时候接触不良也会出现上述问题
看看我测量的自己的单元
<img src="attachments/dvbbs/2005-3/2005328182859504.jpg" border="0" onload="if(this.width>screen.width*0.7) {this.resized=true; this.width=screen.width*0.7; this.alt=\'Click here to open new window\nCTRL+Mouse wheel to zoom in/out\';}" onmouseover="if(this.width>screen.width*0.7) {this.resized=true; this.width=screen.width*0.7; this.style.cursor=\'hand\'; this.alt=\'Click here to open new window\nCTRL+Mouse wheel to zoom in/out\';}" onclick="if(!this.resized) {return true;} else {window.open(\'attachments/dvbbs/2005-3/2005328182859504.jpg\');}" onmousewheel="return imgzoom(this);" alt="" />

空心菜

cbb22

曾测过几个点的电压，还记得有8.95V，7.95V，2.49V，教程上有一个6.X的电压没测到过。

空心菜

空心菜

cbb22

刚想到一个办法，不知可否改善，晚上回去验证一下。如果有效我再告诉大家方法。

维卡亚

1999

曲线没有峰值？怀疑测量的可靠性

q78889

长1米多,再加两个夹子,试过测试10欧电阻曲线是平直一条线,没有任何波浪.

cbb22

以下是引用q78889在2005-3-25 23:40:00的发言：
调整的时候音量是不是到两格黄色?输入调小一点试试.
这是我测的<img src="attachments/dvbbs/2005-3/2005325234024373.jpg" border="0" onload="if(this.width>screen.width*0.7) {this.resized=true; this.width=screen.width*0.7; this.alt=\'Click here to open new window\nCTRL+Mouse wheel to zoom in/out\';}" onmouseover="if(this.width>screen.width*0.7) {this.resized=true; this.width=screen.width*0.7; this.style.cursor=\'hand\'; this.alt=\'Click here to open new window\nCTRL+Mouse wheel to zoom in/out\';}" onclick="if(!this.resized) {return true;} else {window.open(\'attachments/dvbbs/2005-3/2005325234024373.jpg\');}" onmousewheel="return imgzoom(this);" alt="" />

请问你的输出线是怎么做的？就是那条从Probe到喇叭的连线。

我试过直接在6.5插头的两端接上一个8欧电阻，测出的线比较平直。我的probe线是150芯的音箱线，长2米，使用后测出的8欧电阻就有波浪了。

维卡亚

机器的信噪比怎么样？