Canon XRD9827REF ユーザーズマニュアル

 

 

 

 

 

 

 

16

 

 
22. To demonstrate the noise component is contributed from the CIS, we hooked up a DC reference to the 
scanner and the results are shown below in Table 1.  
 

 

 

 

2.0 2.144328 

62.6117 

2.5 3.48261 

58.3988 

3.0 2.399188 

61.6356 

3.5 1.983461 

63.28842 

 
Table 1. Signal-to-Noise Ratio of the XRD9827REF with DC Source as Input (No CIS Noise 
 Component) 
 
As we can see from Table 1, the SNR falls into the range of 58 dB to 63 dB when a DC reference is used 
as input to the XRD9827REF. The system alone gives a 9 1/2 to 10 bit performance. The largest noise 
source we saw in previous scans came from the CIS. A typical plot of the DC reference is shown in Figure 
14.