User's Manual Chapter 13

Base FCC Regulatory Test Report
12-804
AT&T Wireless Services
FCC Type Acceptance Application
10991 Rev. 1.0 7/6/99
12.1 Radiated Emissions Test Setup
Radiated emissions measurements shall be made over the frequency
range specified by the regulatory agency. In this case, per FCC Part 15,
subpart 15.207. Measurements shall be made at the EUT azimuth and
antenna height such that the maximum radiated emissions level will be
detected. This was accomplished using both an automated 360 degree
turntable and 1 to 4 meter height antenna positioners. Sixteen azimuth
cuts at 22.5 degrees and 1 to 4 meter antenna scans in both
polarizations were utilized. The PWAN Base was setup in a typical
field configuration, as shown in Figure 12.1—, consisting of the PWAN
Base being in the center of the turntable. Proper interconnecting cable
was utilized from the PWAN Base to the system power supply. All
radiated emissions testing was completed in three configurations; 1.) 16
voice calls on the same time slot in the same sector. 2.) eight voice calls
per sector. 3.) eight voice /high-speed data calls per sector. Testing was
completed from 30 MHz to 26 GHz. When testing close to or over the
fundamental frequency range, a notch filter tuned to the Remote Unit
and PWAN Base Station fundamental frequencies was utilized to
prevent receiver radio frequency overload and/or damage.
To complete the calls, a test fixture tilizing a rack of sixteen (16)
Remote Units (RU’s) with two telephones per RU was established.
Figure 12.10 shows the RU Test rack used to load the Base. The rack
was designed to hold up to 16 remote units together with all power, RF,
and telco connections. This design was necessary in order to load the
base with the maximum amount of calls on the same time slot and
sector 16 remote units, two lines each for a total of 32 calls). Also
shown are the 32 phones and spectrum analyzer used to monitor calls
through the duration of FCC testing