ADCP-61-819
•
Issue 1
•
July 2000
Page 3
© 2000, ADC Telecommunications, Inc.
2.1.1.1
Assured Best Failure
When the Redundant Amplifier Switch goes into a dual failure state, the assured best failure
algorithm of the microprocessor will momentarily compare the gain of the A & B side amplifiers. It
will then choose the amplifier with the strongest gain and “lock” onto it until the dual failure status
condition is cleared. This assures that the Redundant Amplifier Switch uses the best possible
amplifier during a dual failure condition – to minimize service degradation/interruption.
2.2 Physical Description
Figure 3
shows the front panel of the Redundant Amplifier Switch. The parts are identified by
letter and include a brief description.
A
B
C
D
E
F
15027-A
Figure 3. Front Panel of the Redundant Amplifier Switch
LETTER
NAME
DESCRIPTION
A
Amplifier Input Status LEDs
(Green)
When lit, shows the active amplifier
B
Amplifier Output Status LEDs
(Green)
When lit, shows the active amplifier
C
Loss of Signal (LOS) LED
(Red)
When lit, indicates a loss of input signal
to the unit.
D
Non Functioning LED
N/A
E
Amp Failure LED (Red)
When lit, indicates a failure in amplifier A
F
Amp Failure LED (Red)
When lit, indicates a failure in amplifier B