Comtech EF Data MBT-5000 - Manual (Page 77)

MBT-5000 L-Band Up/Down Converter System MN-MBT5000
Front Panel Operation Revision 4
5–21
ConvX LNA: Calibr (Calibrate Reference Current)
ConvX LNA Ref = 400.0 mA
Calibrate: No Yes (◄ ► E)
On the bottom line, use the ◄ ► arrow keys to select No or Yes, and then press ENTER. If you
select Yes and the LNA successfully calibrates, the current value appears on the top line of the
screen (e.g., 400.0 mA).
If calibration fails, however, the error message “ Calibration failed. Out of
Range.” Displays, an the MBT-500 returns you to the previous menu. You will also observe,
once the previous menu re-displays, that no value appears on the top line for the reference
current (e.g., N/A):
ConvX LNA Ref = N/A
Calibrate: No Yes (◄ ► E)
ConvX LNA: (Window) Enable
ConvX LNA Window:
Disable Enable (◄ ► E)
On the bottom line, use the ◄ ► arrow keys to Disable or Enable LNA alarms/faults
handling, and then press ENTER.
ConvX LNA: (Window) Range
ConvX LNA Range:
20%
On the bottom line, use the ▼▲ arrow keys to select a range percentage from 20% to 50%,
and then press ENTER.
5.2.6 SELECT: Test Menu Branch
TEST: Lamptest
Press ENTER to begin the diagnostics run on the front panel Light-Emitting Diode arrays and
Vacuum Fluorescent Display. The Side A and Side B LEDs will cycle, and the VFD will briefly
generate a test pattern.
Once the test has run, press CLEAR to return to the SELECT: (Main) menu.