It could be many things. 1  Gather facts. 2  Rule out equipment... 3  Back to gathering facts... 4  Call Comcast.  Good 1  luck. Have your problems always existed (with your current installation/configuration)?  When speaking with anyone...
A maximum-phase system is the opposite of a minimum phase system. A causal and stable LTI system is a maximum-phase system if its inverse is causal and unstable. That is, 1  The zeros of the discrete-time system are outside the unit circle.
Limitations. 1  Homogeneous and single phase material is best for identification of an unknown. 2  Must have access to a standard reference file of inorganic compounds (d-spacings, hkls) 3  Requires tenths of a gram of material which must be ground into a powder. 4  For mixed materials, detection limit is ~ 2% of sample.