User's Manual

Restarting an LPA

FlexWave Prism Host, Remote and EMS 5.1 System Reference Page 237

may need to be replaced. Contact ADC Technical Assistance for further help (see

“Contacting ADC” on page 335).

•

LPA VSWR Fault

—Red indicates an internal VSWR fault state of the LPA. Check the

Remote’s antenna connection. If the connection is good and a subsequent LPA

reset does not clear the alarm, inspect the blue cable going from the

corresponding Remote Antenna port to the Duplexer—verify that the connection

is tight. If this doesn't clear the fault, the Duplexer may need to be replaced. Notify

ADC Technical Support (see “Contacting ADC” on page 335).

•

LPA DC Fault

—Red indicates that the voltage level inside the LPA is outside its

acceptable range. If the LPA Reset does not clear this alarm, contact ADC

Technical Assistance for further help as the RF Module that contains the LPA or

the Power supply within the SeRF Module may need to be replaced (see

“Contacting ADC” on page 335).

•

LPA Loop Fault

—Red indicates that the LPA is not sure of the feedback loop, so it

has placed itself into a safe state. You can attempt to recover the LPA by reducing

forward gain by 10dB on both DART cards, resetting the LPA, then restoring GAIN.

If the reset does not work, contact ADC Technical Support (see “Contacting ADC”

on page 335).

•

LPA Over Power Fault

—Red indicates that the power level inside the LPA is high

enough to damage the LPA. Reduce the Remote Forward Gain (see “Link the Host

and Remote DARTs.” on page 159), then reset the LPA.

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LPA Low Power Fault

—Red indicates that the internal gain of the LPA does not meet

specifications. In addition to an LPA Reset, try putting the LPA into standby and

then back to enable to see if this clears this fault. If neither troubleshooting step

clears this alarm, the corresponding RF Module may need to be replaced. contact

ADC Technical Assistance for further help (see “Contacting ADC” on page 335).

•

LPA Missing Fault—Red indicates that the LPA is missing. This fault cannot be cleared

with an LPA Reset.