Zte ZXG10 OB06, Technical Manual

Page: 87 / 117

Chapter 4 - System Functions
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The carrier frequency after channel expansion is shown in Figure 65:
Originally a TRX may provide 8 physical channels; after channel expansion,
one carrier frequency has 4 physical channels, while the carrier frequency
capacity is reduced by half.
F
I G U R E
6 5 A
C T U A L
N
U M B E R O F
P
H Y S I C A L
C
H A N N E L S I N A
C
A R R I E R
0
0
3 2 1
1 2 3 4 5 6 7
The original
TRXs
Extended
channel TRXs
With extended channels, the coverage of the OB06 is theoretically up to a
radius of 120 km, and the maximum time advance is 219. Since the actual
propagation loss of GSM900 is high, and due to the balance between
upper and lower links, the actual coverage radius may be less than the
theoretical value.