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2-19
Making Measurements
Measurements
Bit Error Rate
Measurement
The Bit Error Rate measurement allows you to test the sensitivity of the mobile
phone’s receiver. By reducing the signal transmitted by the Agilent 8922M/S, you
can test the ability of the receiver to accurately decode its incoming signal. Data bits
that are decoded are sent back to the Agilent 8922M/S. The Agilent 8922M/S
compares them to original signal that was sent out and the differences are derived
from this. The audio echo function that works in the Cell Control screen is turned off
when making a BER measurement.
Method
To run a bit error rate test, select the BIT ERROR field in the cell control screen.
This reveals the bit error measurement screen.
This test will run automatically if you set the Single/Cont field to CONT. To run
a test set the Run/Stop field to RUN. This toggle field start/stops the BER test (1)
ratio, see Figure 2-10 on page 2-19.
NOTE There are two sets of results displayed.
• Intermediate Results - this is a running total of the bit errors as the bits are being
tested (2), (this is useful where a large number of bits are being tested).
• Final Results - this shows the completed BER (3). This is displayed after all the
bits have been tested.
Figure 2-10 Bit Error Rate Measurement
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