User Manual

Base Station User Guide 39
4 Configuring the Base Station
Caution: The Base Station arrives pre-configured.
Under ordinary circumstances, there is no need to configure it.
Do not reconfigure the Base Station unless it is really necessary.
This chapter includes the following:
 Learning the Basic Base Station Frequency Setup, described on page 3. This is
important for an understanding of the any Base Station configuration.
 Configuring the WMTS, described on page 3.
 Configuring the Upconverter, described on page 3.
Basic Base Station Frequency Setup
The following sections describe the basic downstream and upstream frequency setup of
the Base Station.
Downstream Channel Frequency Setup
The WMTS downstream channel is configured for 330 KHz width at 64QAM for each
sector. The three upconverters, one per sector, are pre-set to the same RF frequency.
The nominal
 ownconvert IF (input) frequency is 44.0 MHz and its RF (center) output
frequency is 757.5 MHz. The actual RF frequency of each sector is determined by
setting the related IF frequency at the WMTS using the Arcadian Networks
Configuration Tool. The Upconverter includes spectral inversion, and therefore the IF-
RF frequencies’ association is designed accordingly (e.g., higher RF frequency is
associated with lower IF frequency). For a three-sector configuration the downstream
settings are as follows: