Operation/exciter_tune.md

-This flow graph can be used to generate excitation signals for the purpose of tune measurement. Two independend signals for X and Y are supported, and the excitation spectrum is scaled along with the increasing revolution frequency during acceleration based on an RF reference signal.
+This flow graph can be used to generate excitation signals for the purpose of tune measurement. Two independent signals for X and Y are supported, and the excitation spectrum is scaled along with the increasing revolution frequency during acceleration based on an RF reference signal.
 
 → [How to login and open GUI](/Operation)
 
@@ -6,7 +6,7 @@ This flow graph can be used to generate excitation signals for the purpose of tu
 
 General notes:
 * Unhandled errors will cause the GUI to flash red, see console output for details
-* If you see lots of letters `U`, `O` or `D` printed on the console, this indicates a performance issue.
+* If you see lots of letters `U`, `O` or `D` printed on the console, this indicates a hardware performance issue. Please reduce the signal sampling rate (max supported is 5MSa/s) and if problem persists, report it to us.
 
 **Revolution frequency**  
 - Can either be locked (with a PLL) to RF reference signal (connected to RF input 1)
@@ -14,14 +14,14 @@ General notes:
 
 **Excitation signal**  
 - Excitation band width is set in kHz and also shown in tune units  
-  This ensures it will become narrower during ramp to account for increased rigidity
+  This ensures it will become narrower during ramp to account for increased rigidity. This accounts for reduction in tune spread along the ramp
 - The fractional tune is set with respect to the revolution frequency  
   Higher order sidebands are supported by values > 1, but best results have been found for baseband, e.g. q < 0.5
 - The signal levels can be set individually, usually Y requires less power  
 
 **Output**  
-- Signal bursts are started upon pos. trigger flank for the specified duration  
-  A duration of zero means "gated mode", i.e. the burst duration is defined by the trigger pulse duration.  
+- Signal bursts are started upon positive trigger flank for the specified duration  
+  A duration of zero means "gated mode", i.e. the burst duration is defined by the trigger pulse duration. There is some trigger jitter expected (upto 10 ms).
   You can also manually trigger the device using the toggle button (e.g. for testing)
 - The output signal (either X or Y, select via menu) can be monitored  
   The DAC is limited to ±1 V and signals are clipped if the level is too large, which results in broadband signals and will saturate the amplifiers.