Nautel NX25, Operation And Maintenance Manual

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NX300 Operations and Maintenance Manual Operating the transmitter
Issue 3.0 2012-11-01 Page 2-95
Power Lockout
The
Power Lockout
page (see Figure 2.72 ) allows you to set a high power limit for the transmitter.
There is provision to set up to eight different limits (which can be used to accommodate daytime/
night-time patterns or different antennae), but only the selected limit is active. You can also select a
high power limit using a digital remote input (see
Digital inputs on page 2-117 ).
The transmitter power cannot increase beyond the active limit. For analog and hybrid modes of
operation the displayed power limits represent carrier power. For DRM mode, the displayed power
limits represent RMS power. If the active preset set point is greater than the active lockout limit, a
High Power Lockout
alarm will appear on the
Transmitter Status
page.
For basic transmitter operation, you must configure and enable at least one of the eight high power
limits.
Max Power Lockout 1 is factory set for the transmitter’s maximum output power. Set up a power
lockout as follows:
Figure 2.71: System Settings - Power Lockout
1. Select
Power Lockout
from the left side of the
System Settings
page to open a related
window on the right side of the page.
2. Select the desired
Active Power Lockout
( Max Power Lockout 1 through 8 ) from the drop-
down menu
3. Enter the desired
Power Lockout
level for each of the eight lockout options, noting it will
represent the maximum allowable power level.
4. Press
Apply
to activate the change(s) or press
Cancel
to abort.