廈門航拓電氣有限公司

00-105-906，00-105-906

00-105-906

 

00-105-906
3）量化誤差 (Quantizing Error) 由于AD的有限分辯率而引起的誤差，即有限分辯率AD的階梯狀轉(zhuǎn)移特性曲線與分辯率AD（理想AD）的轉(zhuǎn)移特 性曲線（直線）之間的大偏差。通常是1 個(gè)或半個(gè)小數(shù)字量的模擬變化量，表示為1LSB、1/2LSB。
 
4）偏移誤差(Offset Error) 輸入信號(hào)為零時(shí)輸出信號(hào)不為零的值，可外接電位器調(diào)至小。
 
5）滿刻度誤差(Full Scale Error) 滿度輸出時(shí)對(duì)應(yīng)的輸入信號(hào)與理想輸入信號(hào)值之差。
 
6）線性度(Linearity) 實(shí)際轉(zhuǎn)換器的轉(zhuǎn)移函數(shù)與理想直線的大偏移，不包括以上三種誤差。
 
其他指標(biāo)還有：精度(Absolute Accuracy) ，相對(duì)精度(Relative Accuracy)，微分非線性，單調(diào)性和無錯(cuò)碼，總諧波失真（Total Harmonic Distotortion縮寫THD）和積分非線性。
軟件無線電對(duì)模數(shù)變換的技術(shù)要求包括以下幾個(gè)方面：
 
（1）采樣方法應(yīng)滿足采樣定理，適當(dāng)加入抗混迭濾波器；
 
（2）寬帶化，如在中頻對(duì)模擬信號(hào)進(jìn)行數(shù)字化，信號(hào)帶寬通常在十幾到幾十兆赫茲；
 
（3）保持較高的信號(hào)動(dòng)態(tài)范圍；
 
（4）高采樣率，應(yīng)盡量在中頻或射頻工作，以盡可能保證整機(jī)的軟件化處理；
 
（5）減少量化噪聲。
 
模數(shù)變換主要是對(duì)模擬信號(hào)進(jìn)行采樣，然后量化編碼為二進(jìn)制數(shù)字信號(hào)；數(shù)模變換是模數(shù)變換的逆過程，主要是將當(dāng)前數(shù)字信號(hào)重建為模擬信號(hào)。下面主要介紹采樣和重建的方法。  Rexroth DBETR-10/315 Prop Valve w/Pilot LFA25DBW2-62               
                    
     REXROTH R900570744 FD: 68705 M-3SEW6U36/420 MG96N9K4                
                    
     Rexroth DBETE-61/200G24?K31A1V Valve R901029968 NOS               
                    
     Rexroth M-3SEW6U36/420M?G96N9K4 R900570744 Valve New               
                    
     Rexroth 4WRAP 6 W7-04-21/24K4/M Proportional Valve New               
                    
     Bosch Rexroth Ecodrive Servo DKC10.3-012-3-M?GP-01VRS               
                    
     Rexroth Indramat Servo Motor MAC090B-0-JD-4-?C/13C            
                    
     REXROTH MODEL 3460321022 MEASURING PLATE            
                    
     Bosch Rexroth MTC-P01 CNC module FWA-MTCP01 Mannesmann               
                    
     Rexroth Indramat RMK12.2-IBS-BKL NEW RMK122IBSBKL                
                    
     REXROTH CYLINDER 6 X 30               
                    
     Rexroth Hydraulic Electric Relief Valve NEW DB20B2                
                    
     New Rexroth Indramat MKD090B Servomotor               
                    
     REXROTH PPV 202SR V110L HYDRAULIC UNIT            
                    
     Rexroth ZDRE VP2 proportional pressure reducing valve               
                    
     Rexroth 4WRE E16-11/24Z4/M T60098 proportional valve                
                    
     Rexroth 4WRE E32-11/24Z4/M 485172/1 proportional valve                
                    
     Rexroth Indramat Motor ADF104B-B05TA1-?BS00-A2N1               
                    
     Rexroth Caterpillar A10V28 RH Hydraulic Rotary Group               
                    
     REXROTH HYDRAULIC PISTON PUMP A10V0140               
                    
     Bosch Rexroth R 480 208 879 valve valvedriver VDS CD01               
                    
     Rexroth hydraulic Pump PVV1 63160                
                    
     MANNESMANN REXROTH VT11076-21 NSPP VT1107621               
                    
     REXROTH H160CA-50X36-ME?5-V-PU-PU-4-G-2?50-S-A-1 NSPP H16               
                    
     REXROTH PUMP SERVO VALVE, 01-45-2097-1                
 Reliance Electric S-D4008-A AIO Module Input SD4008A