SKY899
Installation Manual
009-11900-001
Maintenance - Page 4-17
Revision F
July 18, 2013
4.4.3 Calibration
NOTE
Ensure transponder is in standby while doing calibration.
Each time the TRC, directional antenna, or any of the directional antenna cables (including connectors)
have been repaired or replaced, the TRC must be calibrated. Calibration is accessed from the Service
Menu (i.e., press SEL with Calibration highlighted).
The calibration screen shows the current calibration value of each antenna. Since only one antenna
location (top or bottom) can be used, the antenna location not configured will have an invalid BIT phase
message.
NOTE
If the TRC has never been calibrated, the current calibration value will
be displayed as Invalid.
The Calibration menu provides the following choices:
Figure 4-36: Antenna Calibration Menu
The calibration value (000-359) is derived from a variety of measurements. Specific values are
meaningless however, in a failed TRC, a varying spread may indicate problems with the directional
antenna system (antenna, cables, or connectors) or the TRC.
NOTE
If the calibration failed, the BIT phase value will be displayed as Invalid.
If calibration was successful a BIT phase value between 000 - 359 will
be displayed.
The document reference is online, please check the correspondence between the online documentation and the printed version.