PA-U1D-C-FA User Manual
ACT-PA-U1D-USR-DOC-V2.2, 09/25/2019
Page 10 of 22
power meters. If any of these meters has exceeded the pre-set thresholds which can be set in the
System Set Tap->ALARM-PARA section, then it triggers an alarm accordingly, and the amplifier
will enter into the auto-protection mode and run at reduced power levels, or even no TX output.
2)
ATT stands for the internal attenuator setting. It is normal to see ATT decrease from its maximum
value (127) to its pre-set value (set in System Set Tap) slowly during a reboot. ATT is also used in
AGC mode when the AGC target value is away from the free-run level.
Important
: If there is an alarm that triggers the amplifier to go into the auto-protection mode,
then the ATT’s value will increase and the amplifier will run at reduced power to protect it from
potential damage. This kind of power drop is by designed for protection purpose. So, if you notice
the output power drops, please first to check if there is an alarm in the system and if the current
ATT value (in the Status Tap) matches what is set in the System Set Tap. Don’t increase the input
of the PA (or the output of the exciter) without checking alarm(s) and ATT value/setting first.
Otherwise, once the alarm has been cleared, you may have a much higher input level than needed,
and it may damage the amplifier and may void the warranty.
3)
AMP-TEMP is the internal temperature readings measured by an onboard temperature sensor. If
this value is higher than the pre-set threshold (TEMP-MAX in the System Set
tap->ALARM-PARA section), then it triggers an AMP-TEMP alarm, and the amplifier will enter
into the auto-protection mode and run at reduced power levels, or even no TX output.
4)
50V-CUR1 is the main transistor current readings. If this value is higher than the pre-set threshold
(50VCUR-MAX in the System Set tap->ALARM-PARA section), then it triggers a 50V-CUR
alarm, and the amplifier will enter into the auto-protection mode and run at reduced power levels,
or even no TX output.
5)
EXCITER shows which exciter is currently selected and on air. Each PA can connect with up to
two exciters (Exciter A and/or Exciter B) as needed.
6)
FREQ is the current channel frequency read from the exciter. If the internal communication
between the exciter and the PA is lost (via RS485), or the PA is not connected with an Anywave
exciter, then this parameter may not reflect the actual channel information.
