User's Manual

#9 ViPR User Manual_Rev2.doc Page 70
generated. If the forward power then rises above 8.3W the error is cleared and a second
SNMP Trap or Notification is generated.
Reverse Power Alarm & Notification
The Reverse Power Alarm will warn the user of a major problem with the Power Amplifier or
Antenna, such as the antenna becoming disconnected. The alarm will trigger when the
measured reverse power increases to within 3 dB of the user configured transmit power.
The Reverse Power Alarm SNMP trap is generated when this condition occurs. When the
reverse power drops 5 dB below of the wanted power the error is cleared and a second
notification is sent indicating the error has cleared.
For example, assume the ViPR is programmed to transmit at 10W. If the measured reverse
power increases above 5.0W then the error is detected and the SNMP Trap or Alarm is
generated. If the reverse power then drops below 3.1W the error is cleared and a second
SNMP Trap or Notification is generated.
PA Power Alarm & Notification
The PA Power Alarm & Notification will warn the user when the power amplifier goes into
either a Foldback or Shutdown State. The power amplifier will first go into the Foldback
state if the PA temperature gets too hot. In the foldback state, the ViPR will cut the
transmit power in half every 4 minutes until the PA has cooled off. The transmit power will
not be reduced further if the power is originally set for 1W or reaches 1W due to foldback.
If the temperature continues to increase, the PA may go into Shutdown mode. If this
happens, another SNMP trap will be generated, indicating that the PA is Shutdown. The
ViPR will not transmit until the unit cools down. This trap will not be sent over the air and
will only be sent out the Ethernet interface.
When the temperature drops back to a safe level, the ViPR will resume transmitting at full
power and the PA Power Notification SNMP Trap will be generated to indicate that the ViPR
is operating at full power again.
USER SETTINGS
 Temperature Display
Select Celsius, Fahrenheit; Default: Celsius