How do you find out the maximum amount of returns a Discrete Terrestrial Aerial Laser Scanner is capable of recording?

For example in a LAS 1.2 metadata under Point Data Records there is the category 'Number of Returns' minimum value and maximum value listed e.g.

  number_of_returns   1          6
  edge_of_flight_line 0          1
  scan_direction_flag 1          1
  classification      1         12
  scan_angle_rank   -30         29
  user_data           0          0
  point_source_ID    45         80
  gps_time 176457.257923 348033.538859
number of first returns:        1906575
number of intermediate returns: 2157
number of last returns:         1906575
number of single returns:       1881894
WARNING: there is 1 point with return number 6
overview over number of returns of given pulse: 1881894 45403 5441 593 76 6 0

As I got a warning I wanted to check what was the maximum number of returns the laser software and/or the processing software was capable of recording. Would the warning indicate that a return number would be erroneous?

I also looked at an example of a laser scanner - Riegl LMS-Q1560 Could not find any reference to maximum possible returns.

What is the maximum amount of returns a discrete aerial laser scanner is capable of recording?

For example in a LAS 1.2 metadata under Point Data Records there is the category 'Number of Returns' with minimum and maximum values listed:

  number_of_returns   1          6
  edge_of_flight_line 0          1
  scan_direction_flag 1          1
  classification      1         12
  scan_angle_rank   -30         29
  user_data           0          0
  point_source_ID    45         80
  gps_time 176457.257923 348033.538859
number of first returns:        1906575
number of intermediate returns: 2157
number of last returns:         1906575
number of single returns:       1881894
WARNING: there is 1 point with return number 6
overview over number of returns of given pulse: 1881894 45403 5441 593 76 6 0

As I got a warning I wanted to check what was the maximum number of returns the laser software and/or the processing software was capable of recording. Would the warning indicate that a return number would be erroneous?

I also looked at an example of a laser scanner (Riegl LMS-Q1560) and could not find any reference to maximum possible returns.