6ES7332-5HD01-0AB0
6ES7332-5HD01-0AB0
6ES7332-5HD01-0AB0
《聯(lián)系人；歐先生》
《座機：0592-5709825》
《傳真：0592-5917519》
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《QQ郵箱：2479261344@qq.com》
速度就意味著生產(chǎn)量：生產(chǎn)量越高，資金和人力資源的使用效率就越高。由于無源標簽從RFID閱讀器獲得它們正常工作所需的能量，多個閱讀器可能導致標簽試圖對詢問它的每一個閱讀器都進行響應。在多閱讀器情況下，為改善系統(tǒng)的吞吐量需要使用某種防沖突協(xié)議。最后，為最大化標簽的讀取范圍，載波對噪聲(carriertonoise)的要求應當最小化，但是這可能與通過最小化載波的不工作時間以防止標簽耗盡能量的需要相沖突。這些優(yōu)化措施對工程師和測量設備提出了挑戰(zhàn)。
讓我們看一個具體的例子——優(yōu)化通信速度，也稱為翻轉(zhuǎn)時間TAT(以下簡稱TAT)。可用的RF能量、路徑衰落和經(jīng)過更改的符號速率能延長標簽對閱讀器查詢的響應時間。響應越慢，讀取多個標簽所花費的時間就越長。快速測量TAT對優(yōu)化RFID系統(tǒng)的速度是非常必要的。
使用RTSA可以很容易地測量TAT。首先，需要安裝一個頻率模板觸發(fā)器以獲取標簽與閱讀器之間的整個查詢。RTSA的功率與時間關系視圖使用戶能夠觀看整個發(fā)射過程。習慣認為一個下行鏈路傳輸(由閱讀器到標簽)結(jié)束到下一個下行鏈路傳輸開始之間的時間就是半雙工系統(tǒng)的TAT。將一個標記放在標簽詢問的結(jié)束點，第二個δ標記置于反向散射的結(jié)束點或下一次閱讀器進行數(shù)據(jù)發(fā)射的開始點，就可以精確測量出TAT時間。在大范圍下行鏈路的條件下維持最短的TAT將有助于系統(tǒng)吞吐量的最大化。
RTSA也能解調(diào)與標簽查詢相關的符號或比特。用戶只需選擇相應的RFID標準、調(diào)制類型和解碼格式。分析儀能自動檢測并顯示鏈路的比特率。為進一步提高工程師的生產(chǎn)效率，對恢復出的數(shù)據(jù)符號進行了基于功能的顏色編碼(color-coded)。RTSA能夠自動識別前導符并將那些符號染成黃色。這易于識別實際的數(shù)據(jù)負荷并與已知值進行比較。
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NEW SQUARE D I-LINE ELECTRICAL PANEL MAIN LUG 400 AMP
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RELIANCE 60 HP DC ELECTRIC MOTOR 262T FR 1150 1600 RPM
NEPTUNE MODEL 831 5 DIGIT FLOWMETER 2" STAINLESS STEEL
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NEW EMERSON DX-308 POSTITONING SERVO DRIVE DXA-308
NEW VERTIFLO 10 HP PUMP MOTOR 1.5 X 1 X 8 SIZE 3500 RPM
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CUTLER HAMMER 112.5 KVA TRANSFORMER 480 DELTA 480 / 277
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ABB 20 HP AC VARIABLE FREQUENCY DRIVE VFD V04207
SYLVANIA 112.5 KVA TRANSFORMER 113-415 480 D 208Y 120LV
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DANFOSS 50 HP VARIRBLE SPEED DRIVE 175H441 440-500 V
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SQUARE D SIZE 6 MOTOR STARTER 8536 COIL 31104-400-50
