RGB Spectrum DGY 201 Benutzerhandbuch

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Connectors and Pinouts
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DGy Model 201 User Guide
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N U L L   M O D E M
You may need to connect the DGy 201’s serial port to a computer 
configured as Data Communications Equipment (DCE). This is done 
using a null modem. The net effect of a null modem is to reverse the 
Transmitted Data and Received Data connections within the cable. Also, 
the Request to Send (RTS) and Clear to Send (CTS) connections are 
reversed. This may be done by using a special “null modem” cable, or by 
inserting a small “null modem” box or cable in series with a regular 
“straight through” cable.