G3L-850-160 MCPA
MCPA Controls and Indicators
044-05236 Rev A
2-3
2.2.2 MCPA Connectors
The MCPA power, alarm, control, and RF connections are made through a D-sub combination male
interface connector located on the rear of the MCPA. Pin assignments are illustrated in Figure 2-2 and
listed in Table 2-3. Alarms are interpreted and generated by the MCPA and reported to the base
station as a system level alarm. The PC I/O RJ-11 connector is for factory use only.
High Reverse
Power
Disables MCPA if the reverse RF
output power is higher than 49 dBm
for a duration of 1-minute.
Minor (Yellow)
during 1-
minute
validation
period then
changes to
Major (Red)
Reverse power must be < 48.3 dBm.
Exceed
Maximum
Voltage
Disables MCPA immediately if
supply DC voltage > +30.5 VDC.
Major
(Red)
Auto-recovery when supply voltage
drops to < +29.5 VDC.
Below
Minimum
Voltage
Disables MCPA immediately if
supply DC Voltage < +20.5 VDC
Major
(Red)
Auto-recovery when supply voltage
increases to >+24.0 VDC
Loop Fail
(Linearization
Alarm)
Disables MCPA if loop convergence
fails.
Major
(Red)
Auto-recovery when loop converges.
MCPA tries to auto recover ten times
before permanent shut down. Two
minutes and 5 seconds for each try.
Internal DC
Fail
Alarm if internal voltages fail or out
of range.
Minor
(None)
Auto-recovery once voltage is within
range. No shutdown until linearization
alarm occurs.
Device Fail
Alarm if one or more output power
devices fail.
Minor
(None)
No auto-recovery. No shutdown until
linearization alarm occurs.
*Note: If MCPA cannot compensate gain to maintain compliance, Output Overpower or Input Overdrive faults protect
MCPA.
Table 2-2 MCPA Alarm States (Continued)
Alarm
Definition
Alarm type/LED
Auto-Recovery
1 2 3
A1
A2
A3
A4
4 5 6 7 8 9
10 11 12 13 14 15 16 17
Figure 2-2 MCPA Interface Connector
