Nautel VS1, Operation And Maintenance Manual, Page: 127 / 224

VS1 Operations and Maintenance Manual Operating the transmitter
Issue 3.1 2013-10-01 Page 2-99
Calibrating Exciter TCXO
You can calibrate the internal clock reference to an external 10 MHz clock or manually enter an offset
value using the remote AUI (see
Calibrating Exciter TCXO - Using the AUI ) or using the local front
panel display (see Calibrating Exciter TCXO - Using the front panel - see page 2-100 ).
Calibrating Exciter TCXO - Using the AUI
To view the AUI’s
Exciter TCXO
screen (see Figure 2.87 ), select
Exciter TCXO
from the
System
Settings
options.
Figure 2.87: System Settings - Exciter TCXO
To automatically calibrate the internal reference for the exciter, click the
Start
button. The progress
bar at the bottom of the page will indicate that the calibration is in progress or complete. The
TCXO
Offset Value
will appear when calibration is complete. Alternatively, if the required offset value is
known, you can manually enter it in the
TCXO Calibration Value
field and click the
Apply
button.
Note:
During calibration, the external 10 MHz clock should be connected to the EXT 10 MHz IN
(A1J4B) BNC connector on the rear of the controller or to the 10 MHz IN (W2J1) BNC
connector on the rear of the optional exciter.