Comtech EF Data XPLINK - Manual (Page 12)

XSAT Palm Link 2 Revision 0 MN/XPLINK.IOM
10
Chapter 7. LNA Configuration
XSAT#: (XSAT1/XSAT2) Sets the currently selected XSAT. The Currently Selected XSAT is
used in several menus (in 1:1 mode only) that allows the user to view or change most
parameters of the Currently Selected XSAT.
Note: this selection is not to be confused with the Online XSAT selection in the
Redundancy controller section.
ONLINE/OFFLINE status field:
(Status only). Displays the line status of the Currently Selected XSAT.
Current Source: The XSAT has the circuitry to source up to 400mA of current at 12 VDC to
power a LNA. This current source can be turned ON/OFF by the user. Care should be taken
when directly connecting the XSAT to LAB test equipment. A DC block should be used between
the “RF IN” port and the RF test source to protect the test equipment in case the source is
accidentally turned on.
Fault Logic: The XSAT allows the user to select
whether or not the summary fault relay is
activated if the LNA current moves out of the
prescribed window. This allows the user to
control whether or not the redundancy controller
will switch on a LNA current alarm in the
redundant configuration.
Current Window: The XSAT provides the
capability to monitor the LNA current when
configured to supply current to the LNA. In
addition, an adjustable window detect for the
LNA current is provided. After attaching the
LNA and turning on the current source, the user
can “Calibrate” the current and set a window
from +/- 20% to +/- 50% to trigger an alarm.
The user can disable the “window detect” feature
by setting the window value to +/- 99%.
Allowable Change: +/- 20% to +/- 50%.
See the documentation in the Current Window
above.
Figure 4