Unit Description, ASU
P008375B
CDU
CXU
Antenna
connection
fields
ASU
Figure 98 ASU location in the RBS 2206
12.1.2 Couplers
The ASU consists of 6 couplers, performing the following functions:
• 200
resistor to ground for cable supervision purposes
• Directional coupler
• Attenuator
• Switch to select between high and low attenuation
• Built-in overvoltage protection
A schematic view of one coupler is shown Figure 99 on page 173.
172 (485)
EN/LZT 720 0008 P2A
2001-11-28
© Ericsson Radio Systems AB
— All Rights Reserved —
Preliminary
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