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groups:mg:dds [2016/10/26 17:53] – ssauergroups:mg:dds [2018/08/31 13:49] (current) – removed ssauer
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-====== DDS ====== 
-We have two types of DDS (Direct Digital Synthesis) with //USB// port or //Serial// port.  
-<note important>Use the right software for programming!</note> 
- 
-**Default values:**  
-  * For generate a **fix** output frequency you can use two reference possibilities:  
-      - "Internal Clock Frequency: 400 MHz" 
-      - "External Clock Frequency: 100 MHz". Input power should be 10 dBm < P < 20 dBm. 
-    * The output frequency can be only less than the reference frequency! 
- 
-  * When using **divider** setup with any input and output frequency, the input power should be: 
-      * f_in < 150 MHz => 10 dBm < P < 20 dBm 
-      * f_in > 150 MHz => P ~ 0 dBm 
-      * Devided by 2 isn't possible! (said Andreas from PTB) 
- 
-===== USB-DDS ===== 
-{{:groups:mg:img_1561.jpg?200|}} 
-  * Software //DDS// for USB Type PTB DDS 
-  * Datasheet/Manual: 
-{{:groups:mg:usb1.jpg?300 |}}{{:groups:mg:usb2.jpg?300 |}}{{:groups:mg:usb3.jpg?300|}} 
-  
- 
-==== Modifikation to frequency divider ==== 
-Manual: {{ :groups:mg:umbau_zum_frequenz-teiler.pdf |Anleitung zum Teilerumbau}} 
- 
-===== Serial-DDS ===== 
-{{:groups:mg:img_1562.jpg?200|}} 
-  * Software //Terminal// for Serial Type DDS 
-  * Datasheet/Manual: 
-{{:groups:mg:img_1309.jpg?300 |}}{{:groups:mg:img_1310.jpg?300 |}} 
-