Added example with image to channel delay

docs/signals/delays.rst

@@ -18,6 +18,8 @@ Signal delays in pulse and acquisition paths are caused by:
 
 The delay can be specified per channel. It is specified as the delay added to the channel.
 
+Channel delays add extra samples on the begin and end of the uploaded sequence.
+
 Example:
  If the MW signal is delayed by the VSG and arrives 45 ns later than the signals of gates P1 and P2,
  then you can add 45 ns to the gates P1 and P2.
@@ -27,10 +29,22 @@ Example:
      pl.add_channel_delay('P1', 45)
      pl.add_channel_delay('P2', 45)
 
- Alternatively, you can also subtract 45 ns for the I and Q channel.
+ Alternatively, you can subtract 45 ns for the I and Q channel.
 
  .. code-block:: python
 
      pl.add_channel_delay('I1', -45)
      pl.add_channel_delay('Q1', -45)
 
+
+Example:
+ .. figure:: /img/delay.png
+    :scale: 100%
+
+    Delays on P2 and SD1.
+
+ .. code-block:: python
+
+     pl.add_channel_delay('P1', 0)
+     pl.add_channel_delay('P2', -10)
+     pl.add_channel_delay('SD1', +20)