
Interface Configuration and Interpretation
Input Card Screen - QPSK
Figure
The constellation display in the graphing area is a representation of the digitally modulated carrier's instantaneous phase and amplitude for each transmitted symbol. A good constellation will have
The Grid area of the screen contains the following controls:
Size | This selection will be dictated by the installed interface card. If |
| the Auto checkbox is selected, the grid size can be selected from |
| the |
Clear Points | Clears all points from the display grid. |
The Readings area of the screen contains the following controls:
MER (dB) (Modulation Error Ratio) Provides a single 'figure of merit' for received signal. It is the ratio of 'ideal signal vectors' to 'errored signal vectors' expressed in dB. MER is similar to a
MTM400 MPEG Transport Stream Monitor User Manual |