Table of Contents
Advertisement
QMultiFlex-400™ Installation and Operating Handbook
Figure 8-16 shows four Paired Carrier hub canceller monitor values:
1. Paired Carrier Lock: Shows real-time lock status. Should the canceller lose lock, an alarm
will appear on the `View > Alarms` menu. The alarm will also be registered in the log file,
which can be viewed by navigating to `View > Log` menu page.
2. Paired Carrier delay: In the above example, the delay is zero because the system was
running in a laboratory environment without a satellite delay simulator. If the canceller is
unlocked, an indication of the delay sweep status is displayed.
3. Paired carrier offset: This represents the frequency offset of the received echo relative
to its expected frequency location.
4. Near/Far power ratio: This is simply the ratio between the near power level (i.e. the power
level associated with the received echo) and the sum of the IB carrier power levels from
the far or remote stations. This power ratio should be in the range -10dB to 10dB for normal
operation.
It is possible to zoom into an area of the plot that may be of particular interest. Use the
mouse cursor to drag over the area of interests.
Figure 8-17 – Selecting an Area to Zoom
8-16
Advertisement
Table of Contents
