1800MHz-1900MHz Off-Air Repeaters (OR Series)
Page
91 080 0701F – Rel.04
CHAPTER 4
4.11
9.
SET THE REPEATER GAIN, FREQUENCY CENTER AND BANDWIDTH
-
Select the menu entry ‘Read’ in the ‘Device’ menu, or click the ‘
Read’ button, to read the
equipment configuration and status.
The software main window is displayed.
By means of the software set the repeater gain as described below.
NOTE
How to modify parameters:
-
Click on the ‘edit and save’ button, in the lower part of the window, to enable changes to the repeater
parameters.
-
Click again on the ‘edit and save’ button to save changes.
-
The menu entry ‘Write’, in the ‘Device’ menu, makes it possible to apply changes to the repeater. A
password is required: default password is blank. To change the password please refer to the
software User’s manual.
a) In the tree structure of the repeater system (FIGURE 9) select the repeater (double click on
‘Repeater’): on the right side of the window, the configuration and status panels of the repeater
will be shown (Description, Spectrum, Parameters, Alarms, Communications, Advanced).
b) In the description panel, the user should select ( FIGURE
10
) if the system is TDMA or CDMA.
This selection allows to load the right values of RF power transmitted by the HPAs (only for
1900MHz repeaters)
.
FIGURE 10 – Selection TDMA / CDMA
c) In the ‘Spectrum’ panel (FIGURE 11)set both ‘UL-attenuation’ and ‘DL-attenuation’ to 30 (dB) -
maximum attenuation, i.e. minimum gain.
d) Connect the cable from the donor antenna to the BTS connector on the bottom of the repeater
(
ref. 52
, FIGURE 3).
e) Connect the MS connector on the bottom of the repeater (
ref. 56
, FIGURE 3) to a spectrum
analyzer.
f) In the Spectrum panel, set the Up-link frequency center and bandwidth.
In the same panel set the repeater gain (UL-Up-link- attenuation, DL-Down-link- attenuation).
