User's Manual Part 2

RBS 2109 User’s Guide
In this example, Far End and the RBS refer to
the figure above The cable length between the RBS
and the Far End is 150 m.
The cable attenuation for the cable between the RBS
and the Far End is 0.03 dB/m
1. Calculate the cable attenuation between the
Far End and the RBS:
150 m x 0.03 dB/m = 4.5 dB
2. Set Receiver Sensitivity A for the RBS to
“Short haul”.
3. Set Receiver Sensitivity C for the RBS to
“Short haul” (not connected).
4. Set Receiver Sensitivity B for the RBS to
“Short haul” (not connected).
5. Set Receiver Sensitivity D for the RBS to
“Short haul” (not connected).
Example 5 Calculating Receiver Sensitivity Parameters for Transmission
Interface E1, 120
7.6.13 Defining Transmission Interface T1, 100
This section describes how to define parameters for transmission interface T1,
100 . When using the cable length for calculations in the following sections,
the cable used must be the reference cable (multipair 22 AWG office cable)
or similar.
1. Find the transmission interface type in the Site Installation Documentation,
and use the table below to find the applicable section with instructions
for setting the parameters.
Table 32 Selecting Section for Defining T1, Transmission Interface Type
Known
If the transmission interface type is... then...
DSX-1 go to Section Defining LBO
Parameters as Short Haul on
Page 120.
the signal level at the customer
interface and the cable
attenuation is known
go to Section Defining LBO
Parameters as Long Haul
Manually on Page 123.
only the maximum input signal
level at the far end is known
go to Section Defining LBO
Parameters as Long Haul
Automatically on Page 127.
DS1 and...
neither the signal level at the
customer interface nor the
cable attenuation are known
go to Section Defining
LBO Parameters when
Transmission Characteristics
are Unknown on Page 133.
119EN/LZT 720 0090 Uen R1A 2004-09-17