User's Manual

800MHz-900MHz Off-Air Repeaters (OR Series) Page 91 080 0716F – Rel.06
CHAPTER 4
12
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
800MHz 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).
PLEASE NOTE:
should it be necessary to set an attenuation greater than 15dB it is strongly recommended to
connect a fixed attenuator between donor antenna and the repeater BTS side port to avoid BTS
desensitisation due to excessive radiated up-link noise.