User Manual

ADCP-75-179 • Preliminary Issue A • September 2004 • Section 4: maintenance
Page 4-5
© 2004, ADC Telecommunications, Inc.
Table 4-3. 35 Watt LPA LED Indicators and Digital Display
INDICATOR COLOR DESCRIPTION
FAIL
Off
Yellow
Indicates if the LPA is normal or faulty.
The LPA is normal.
Internal fault detected in the LPA.
SHUTDOWN
Off
Red
Indicates if the LPA has an RF output or if the RF output
is shutdown.
The LPA RF output is on.
The LPA RF output is shutdown.
DISPLAY MESSAGE 1ST LINE DESCRIPTION
PA Initializing The LPA is initializing itself and is not ready for operation.
Normal Operation The LPA is enabled and transmitting RF.
Internal Shutdown The LPA is disabled due to a major fault and is not transmit-
ting RF.
Forced Shutdown The LPA is disabled by the front panel control switch or
through the EMS.
DISPLAY MESSAGE 2ND LINE DESCRIPTION
Over Power The LPA maximum RF output rating has been exceeded.
Over Temperature The LPA maximum operating temperature has been exceeded.
VSWR The voltage standing wave ratio is greater than 3:1.
DC Fail The LPA internal DC power supply is out of specification.
Low Gain The LPA internal amplifier gain is too low.
Alarm: OK The LPA does not detect any faults that would cause an alarm.
Loop Fail The LPA internal loop gain in out of range.
Fan Fail One or both of the LPA cooling fans has failed.