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W3013 参数 Datasheet PDF下载

W3013图片预览
型号: W3013
PDF下载: 下载PDF文件 查看货源
内容描述: W3013间接正交调制器增益控制 [W3013 Indirect Quadrature Modulator with Gain Control]
分类和应用:
文件页数/大小: 12 页 / 146 K
品牌: AGERE [ AGERE SYSTEMS ]
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W3013 Indirect Quadrature Modulator  
with Gain Control  
Preliminary Data Sheet  
November 1998  
Error Vector Magnitude (EVM) Testing  
Error vector magnitude (EVM) is estimated by feeding signals to the W3013 as described at the top of the  
Electrical Characteristics table. A narrowband, sine-wave modulation output spectrum is shown in Figure 3.  
0
–10  
–20  
USB  
–10 dBm  
fBB = 80 kHz  
fLO1= 178 MHz  
fLO2 = 1620 MHz  
RFOUT= 1442.08 MHz  
–30  
–40  
–50  
CARRIER  
–50 dBm  
LSB  
–53 dBm  
U2  
L3  
–63 dBm  
–61 dBm  
U3  
–71 dBm  
–60  
–70  
–80  
L2  
–72 dBm  
U5  
–77 dBm  
L4  
–81 dBm  
U4  
–84 dBm  
L5  
–82 dBm  
–90  
1441.60 1441.68 1441.76 1441.84 1441.92 1442 1442.08 1442.16 1442.24 1442.32  
FREQUENCY (MHz)  
1442.40  
Figure 3. W3013 Sine-Wave Modulation Output Spectrum  
Data from this spectrum are used to estimate EVM by the formula:  
P(L5)/20 P(L4)/20 P(L3)/20 P(L2)/20  
EVM (%) = 100 · [10 + 10 + 10 + 10  
+
P(LSB)/20 P(U2)/20 P(U3)/20  
P(U4)/20  
P(U5)/20  
+ 10  
P(USB)/20  
]/10  
10 + 10 + 10  
+ 10  
The data presented in the spectrum above would yield:  
EVM (%) = 100 Ÿ [79e–6 + 89e–6 + 891e–6 + 251e–6 + 2239e–6 + 708e–6 + 282e–6 + 63e–6 +  
141e–6]/0.316e  
= 1.5%  
This approximates worst-case digital modulation results because the sine-wave modulation estimate assumes all  
spurious outputs are in phase and adds their magnitudes as scalars. In addition, this estimate includes full-  
amplitude measurements of spurious peaks that would appear in adjacent and alternate channels, where a  
receiver would otherwise provide attenuation. The L3 third-order intermodulation peak and LSB (lower sideband)  
are normally the unwanted output frequencies that dominate the EVM estimate.  
6
Lucent Technologies Inc.