Alpha Technologies XP-EDH4 - Technical Manual - Manual (Page 61)

61 745-419-B0-001 Rev. A (11/2013)
Fig. 3-19, Sample QAM Constellation—Normal Centered Dots (Good Quality)
Fig. 3-20, Sample QAM Constellation—Fuzzy (Low CNR and/or Low MER)
3.0 Configuration and Operation, continued
3.9.20 Interpreting QAM Constellation Data by Visual Inspection, continued