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REF # MODULE NAME
6
RAN Down Converter (RDC or RDC2)
7
RAN Up Converter (RUC2.X or RUC3)
8
800 MHz Multi-Coupler
9
1900 MHz Multi-Coupler
10
Fan Access Panel
Figure 7
is a schematic showing the data flow in the RAN chassis, as represented by the PCS-A
band. As shown, data flows in two directions, from the Hub through the RAN to the antenna,
and from the antenna through the RAN back to the Hub. In each direction, data conversion
occurs, with optical data "upconverted" to RF data in the up direction in the schematic, and RF
data "downconverted" to optical data in the down direction. In an up direction, the RUC module
converts Digitized Intermediate Frequency (DIF) data into PCS, Cellular, and SMR frequency
RF bands. The RF signals are amplified and then transmitted from the RF antenna. In the down
direction, the RDC module converts PCS, Cellular, and SMR frequency bands into DIF data.
The overall series of events is managed by the CPU using an Ethernet connection to the chassis
backplane.
1900-P
ANT
PCS QUADPLEXER
A
B
RAN
MCPA
RF
RUC
DIF
Table 3. RAN Chassis Electronic Modules
MB
ANT
ANT
PCS QUADPLEXER
F
RX
D
E
Pri
6
Pri
DIF
SIF
Fiber
Fiber
HUB
Figure 7. RAN Chassis Schematic
FOR DETAILS REFER TO
Section 1.7.6 on Page 17
Section 1.7.7 on Page 19
Section 1.7.9 on Page 20
Section 1.7.10 on Page 22
Section 1.7.8 on Page 20
1900-D
C
RX
RAN
DIF
Div
SIF
RUC
1900
MCPA
MUL
MB ANT = Multi Band Antenna
6
MUL
RDC
Div
RDC
DIF
Ethernet
© 2007, ADC Telecommunications, Inc.
ADCP-75-210 • Issue 1 • March 2007
= Radio Access Node
= Digital Intermediate
Frequency
= Synchronous Interface
= RAN Up Converter
= Munti-Carrier Power
Amplifier
= Multi-Coupler
= RAN Down Converter
CPU
21777-A
Page 11
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