User's Manual

IMPORTANT NOTE
: To comply with FCC RF safe-human-exposure compliance requirements,
antenna installation and device operating configuration described in this user manual must be
satisfied. The transceiver(s) used for this device must be fixed-mounted on outdoor permanent
structures with a separation of at least 1.5 meters from all persons during normal operation.
5.5.4 Upstream Power
The output level of the wireless cable modem (WCM) establishes the subscriber transceiver’s
output power. An automatic feedback loop, controlled by the W-CMTS, commands each WCM
to adjust its output level such that all the signals are received at the Hub at about the same RF
power. The user may tune this power control loop by modifying the appropriate parameter in the
W-CMTS configuration. A discussion of this parameter follows in the Installation Tuning section
of this manual.
The Subscriber Transceiver is factory calibrated to maximum FCC permissible EIRP when the
DOCSIS WCM is at its maximum power output level.
Spectrum analyzer traces of the upstream signal are illustrated in the Installation Tuning
section.
June 2003 Page 5-15