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New Member
加入日期: Aug 2002 您的住址: Taipei
文章: 8
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無線網路信號強度疑問?
我在家中測試無線網路的信號
測得的值都是-xxdbm -xx的值越小,信號越強嗎? 因為越靠近AP,信號的dbm越小 如-60dbm>-30dbm 但是我看我的無線網路卡規格都是 -91dBm @ 1Mbps -89dBm @ 2Mbps -87dBm @ 5.5Mbps -86dBm @ 6Mbps -85dBm @ 9Mbps -82dBm @ 12Mbps -80dBm @ 18Mbps -78dBm @ 24Mbps -77dBm @ 36Mbps -76dBm @ 48Mbps -73dBm @ 54Mbps 使指在小於-73dBm才有54Mbps的速度嗎 可是有時隔兩道牆後,信號只有-20dbm到-12dbm 但是信號格數只剩兩格 可不可以請哪位大大解釋一下 |
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2004-04-07, 04:29 PM
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Moderator
 
加入日期: Nov 1999
文章: 3,863
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回覆: 無線網路信號強度疑問?
1) -30dBm > -60dBm
2) FER(frame error rate) means the ratio of recevied good packets to overall transimit packets Sensitivity means beyond the limit in spec., the FER > 10% for G mode, FER >8 % for B mode 3) "-20dBm" or "-12dBm" is strong signal level. If there are two walls between AP and user. I think the signal stregth is very weak. So I think this value is unreliable.
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預算可以刪減，品味不能打折。 |
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2004-04-08, 01:30 PM
#2
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