cdsFilt.md

@@ -32,7 +32,7 @@ Generally speaking the `cdsFilt*` blocks take a floating point value as input th
 ### DAQ Capable Fast Channels
 DAQ channels are generated for each filter module, but need to be added to the DAQ channel list to be recorded by the DAQ.
 
-You do this by adding the name of the channel (without the '_DQ' suffix) to a DAQ Channel block
+You do this by adding the name of the channel (without the '_DQ' suffix) to a DAQ Channel block. More info about the DAQ Channels block here(TODO).
 > ![image](uploads/261973e8325cf35f9e6b3c70230ae936/image.png)
 
 
@@ -49,6 +49,17 @@ You do this by adding the name of the channel (without the '_DQ' suffix) to a DA
 The `cdsFilt` part has all the above mentioned EPICS channels. 
 
 ### cdsFiltCtrl
+![image](uploads/b3f22055273c4c6d873234badacd8c51/image.png)
+
+The `cdsFiltCtrl` block adds two additional inputs and 1 additional outputs. 
+| Port Name | Function |
+| --------- | -------- |
+| In1       | Input sample, same as `cdsFilt`. |
+| Cin       | Control input. A bitfield containing controls bits for the filter provided by the realtime logic, instead of EPICS channels like in the `cdsFilt` case. |
+| Mask      | Local control (LC) bitfield mask. This specifies the control bits that are controlled by the models realtime logic, instead of EPICS channels like in the `cdsFilt` case.|
+
+#### Additional EPICS channel 
+The `_MASK` channel is made available with `cdsFiltCtrl` and `cdsFiltCtrl2` parts. This is a read only channel that records the value of the Mask input port. 
 
 ### cdsFiltCtrl2