Service Manual

325
6802800U74-AN
Chapter 10: Base Radio
Figure 182: Mid-power PA Functional Block Diagram
PA
INPUT
PA
OUTPUT
FB
OUTPUT
10.3
Base Radio – Indicators and Connectors
Table 99: Base Radio – LED Indicators
#
LED/Port
name
Type Controlled by Indication
LED
1
LED
2
Tx Red/
Green
Aux Red/
Green
SW BR keying:
• OFF: BR is not keyed
• AMBER: BR is keyed without
service
• GREEN: BR is keyed
SW
• OFF: No alarms
• AMBER: not used
• RED: not used
LED
3
Status Red/
Green
SW Red LED
will turn on be-
fore SW
change any in-
dication
BR status:
• OFF: Status unknown, power
off
• GREEN: BRC main applica-
tion is running
• AMBER: Waiting for SWDL
this is where the BR will wait if
no Site Controller is present
• RED: SW not started, power
on
LED
4
BR Alarm Red/
Green
SW
• OFF: No alarms
• AMBER: BR minor alarm: PA,
Exciter, RX, BRC Reduced
performance
• RED: BR failed: PA, Exciter,
RX, BRC
Blackbear2
Adjustable
Atten
Attenuator
Combiner
Splitter
LDM
Forward/
Reverse
Coupler
Circulator
Feedback
Coupler
Fixed
Attenuator
Adjustable
Atten
Blackbear2