User's Manual

Table Of Contents
Installation, Operation and Service Manual 90DIB500R41IM_FCC02 99.1 143
DIB-500 R4.1 Configuration
Adjusting a cavity coupler – optional (cavity variant only)
6.2 Adjusting a cavity coupler – optional (cavity variant
only)
The cavity coupler must be matched to the set Tx frequency of the connected carrier. To
be able to perform this setting, only the carrier to be measured in each case is activated
to exclusively measure its power at the antenna output. The Tx frequency is adjusted
with the handwheel of the corresponding cavity coupler so that the maximum transmit-
ting power is present at the antenna connection.
Damage to circulators
When new frequencies are configured via the NMC-515 network management client,
the circulators may be damaged if the cavity coupler(s) is/are not adjusted to these fre-
quencies.
Configure a maximum transmitter output of 1,000 mW via the NMC-515 Configura-
tionManager for the corresponding carrier(s) using the carrier item. This corre-
sponds to a value of 30 dBm.
Adjust the cavity coupler(s) as soon as possible to the corresponding frequencies.
The cavity coupler(s) must be adjusted manually.
Procedure described refers to one cavity coupler
The procedure described in the following refers to one cavity coupler. Depending on the
DIB-500 R4.1 variant, the work steps may have to be repeated for further cavity cou-
plers.
The tasks listed in the following table must be performed for the adjustment of a cavity
coupler.
Table 6.11 Overview of the tasks to be performed (Adjusting a cavity coupler – optional (cavity vari-
ant only))
Tasks/work steps Described in
Connecting the service computer to the TIB transceiver module Section 6.1.2.1
on page 133
Setting the output rating Section 6.2.2 on
page 144
Measuring and checking the carriers (impedance adjustment) Section 6.2.3 on
page 146