The QAM INGRESS mode allows you to:
- view a graphic depiction of the signal,
- view the QAM type (64 or 256),
- view the channel number,
- view the channel frequency level information,
- examine Modulation Error Ratio (MER)

The QAM INGRESS mode continuously updates the graphic depiction of the signal along with the MER and BER data.

Softkeys

Three softkeys on the QAM Ingress screen provide the following options:

VIEW

Use the arrow keys to choose the menu item you prefer and press ENTER to make your selection.

Select Auto Reference to adjust the vertical access so that the maximum ingress value is displayed at the top of the scale.

Select 5 or 10 dB/div to change the units on the vertical scale.
 

Select Peak Hold Toggle to display of peak hold. When peak hold is toggled on, peak values are reset.

Select (or deselect) Reset to manually reset the QAM Ingress function. Only enabled if Peak Hold is selected.
 

Select Single Channel to display the Level measurement mode.

Select Constellation to display the Constellation measurement mode for current channel.
 

Select Pause to suspend measurement updates (Keystroke shortcut: SHIFT 8). Pause This option shall Pause or Resume the display. Disabled if viewing data from a file.
 

Use the arrow keys to select Marker A or Marker B as the active marker, then press ENTER. Use the Left and Right Arrows to move the marker.

 

SETTINGS
Use the arrow keys to select Channel Plans and press ENTER to make your selection.