User's Manual Chapter 13

Chapter 8: Parts List/Tune Up Information
AT&T Wireless Services
8-189
FCC Type Acceptance Application
10991 Rev. 1.0 7/6/99
In this test, a Noise-Com 6105 noise generator served as the Gaussian
noise stimulus for the Bosch TRX transceiver unit and its associated
DUT. The 6105 used for this test was fitted with variable attenuators
allowing its output level to be varied in 1 dB increments. A K&L 4
MHz bandpass filter on the output of the 6105 was employed to band
limit its Gaussian noise to the 4 MHz IF frequency of the TRX as
depicted in Figure 8.2. Please note that the plots included in Figure 8.2
and Figure 8.3 were made with the VSA configured per Table 8.3—.
These parameters include a 21.1 dB power offset to compensate for
directional coupler and cable losses when making output power
measurements at the DUT operating frequency. As a result, displayed
power measurements for the 4 MHz input stimulus shown in Figure 8.2
and Figure 8.3 read 21.1 dB higher than the actual input power level.
External Attenuation 21.1 dB
Peak/Average Metric 99.0%
Trigger Type Free-Running
Frequency-Domain Averaging 20 Samples, RMS
Exponential
FFT Window Type Flat Top
FFT Freq. Points 1601
FFT Resolution BW 12 kHz
Table 8.3— Hewlett-Packard 89441A Configuration Parameters
Parameter Value