Agilent Technologies 8922M, S GSM manual Bit Error Rate Measurement

	Making Measurements
	Measurements
Bit Error Rate	The Bit Error Rate measurement allows you to test the sensitivity of the mobile
Measurement	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.

3

2

1

4

Figure 2-10 Bit Error Rate Measurement

2-19