HP 83236B S Interface manual Receiver Performance in Additive Noise

Chapter 2, Making Measurements

Receiver Performance in Additive Noise

Receiver Performance in Additive Noise

Overview	In this test, the CDMA signal generator is used with the Additive White Gaussian
	Noise (AWGN) source to simulate an uplink signal to the base stations’s receiver.
	Various levels of signal-to-noise (Eb/No) can be used and the resulting Frame
	Error Rate (FER) is measured at each Eb/No level.

EVEN SECOND/

SYNC IN

Receiver Port 1

H

Receiver Port 2

Even-second

Clock

(Rear Panel)

SYNTH

REF IN

	Time Base
	H
	RF IN/OUT
Figure 21
NOTE:	The test procedures outlined in this section require that you have already configured the
	Test System as outlined in chapter 1, "Getting Started".
Requirements	• You will need a means of reading the Frame Error Rate (FER) from the base station.
	The CDMA generator sends a random bit pattern which the base station decodes and
	uses to calculate FER. Some means of reading the calculated value is required. Often
	this is done via a laptop PC connected to the station equipment by serial or LAN port.

•This test requires synchronization between the Test System’s CDMA signal generator and the base-station-under-test. This is achieved using the Even-Second clock signal from the base station.

•The CDMA generator should be connected directly to the receiver’s input(s). This can be achieved by connecting to only one input at a time or by using a splitter to connect to both inputs at once (if there is more than one receiver test port).

•You must know the following about your base station and setup:

❒The base station channel number setting.

❒The Receiver PN Offset for the base-station-under-test (typically 0).

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