APEX
™
Exciter Incorporating FLO
™
Technology
RTAC Operating Procedures, Main Screen.
Navigating the LCD Display Screens
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WARNING: Disconnect primary power prior to servicing.
To gain access to the diagnostics and the frequency and frequency offset select entries on
the exciter setup screen, the System Setup > Diagnostics Setup: Locked screen must be
entered. This time an alpha/numeric keypad will appear.
• Enter the correct password and select Done.
If the password is correct, Diagnostics Setup will change to Unlocked, if incorrect it
will remain locked.
Diagnostics functions can now be used, and these functions will be remain available
until the Diagnostics Setup screen status is changed to Locked.
3.6.8.3
Factory Setup (Locked or Unlocked)
The Factory Setup in the System Setup screen, see Figure 3-46, on page 3-54, is nor-
mally locked. It is not a customer feature. If the System Setup > Factory Setup:
Locked soft key is pressed, an alpha/numeric keypad will appear. A password is re-
quired unlock this function. This feature locks several functions that are accessed in
the factory when the unit is being tested.
3.6.9
Restore Defaults
The restore defaults soft key on the System Setup screen, see Figure 3-46, is locked
under the Factory Setup password.
3.7
RTAC Operating Procedures, Main Screen.
RTAC operation involves several exciter screens. The operating information from several
screens is summarized below.
3.7.1
From RTAC Section of Main Screen
The various sections of RTAC correction which can be activated from the main screen are:
• Lin HPF (RF feedback sample taken after the high power filter)
• Non-Lin (PA output feedback sample, taken before the high power filter).
The possible states for each corrector are:
• Bypass: Turns the selected corrector off
• Default: Selects a pre loaded correction algorithm from the RTAC Filter Setup
screen. Saving an RTAC correction algorithm to an RTAC filter is covered in Section
3.6.3 on page 3-38.
• Adapt: Turns the selected corrector on
• Hold: Keeps the last correction value for the selected mode. This is a short term op-
tion. For long term use select Default.
If any of the three choices above is set to Adapt and its RF sample to the down converter
board is missing or is outside the prescribed input power range, the adaptation for that
choice will not be performed. In either of the above two failure modes, that RF sample,
shown in the adaptive precorrection board status screen, will show fault.
