PA-280W User Manual
ACT-280PA-USR-DOC-V1.3, 07/11/2018
Page 17 of 24
indicates the TX is ON. When RED, this indicates the TX is OFF.
FWD: Forward Power Meter. Touching the white display box of FWD will toggle its display
units between “dBm” and “W”.
REFL: Reflected Power Meter. Touching the white display box of REFL will toggle its display
units between “dBm” and “W”.
VSWR: Voltage Standing Wave Ratio
Status Bar
: During normal operation, the default status is “RUNNING OK”. If there is any alarm, the
alarm will show up in the Status Bar of each screen.
Block Diagram
: Press the “Exc A/B” graphic to navigate to the Dual Exciters Switching screen
(shown below). This screen shows which exciter is currently on-air (highlighted GREEN) and allows
the user to manually change the on-air exciter.
3.3.2.
A/B Exciter Icon Screen
Dual Exciters - Switching Screen
: As mentioned above, pressing the “Exc A/B” icon will bring you to the
Dual Exciters Switching Screen, a shown below.
Manual Exciter Switchover
: Exciter A is the default on-air exciter. The on-air exciter’s status will be
“GREEN”, as shown in the screen above, indicating that Exciter B is the current on-air exciter. Pressing
the “Exciter A” or “Exciter B” button on this screen will cause a manual switch between exciters, that is if
the PA is “linked” to both exciters. (Note: In a dual exciter configuration, both exciters are on at the same
time, producing an RF output signal a the same time, and the PA is considered “linked” with an exciter
when the PA detects an RF output present from the exciter as monitored).
Auto Exciter Switchover
: In a Dual Drive configuration, the PA is set to auotmatically switch to the
standby exciter in the event a problem occurs with the on-air exciter. The PA will not automatically switch
back to the original Exciter as long as the standby Exciter is operating properly. However, the PA will