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Additional ETSI 11.21 receiver tests

In addition to the Sensitivity and Reference Interference Level tests, the ETSI

11.21 standard includes two functional tests and three additional selectivity

tests briefly described below:

Static layer RX function

This functional test verifies the operation of the demodulation and decoding

process. A GSM modulated traffic channel is applied and the unprotected

class II bits are evaluated.

Erroneous frame indication performance

This functional test verifies the operation of the bad frame indication (BFI) and

the frame erasure indication (FEI). The base station RX input is terminated,

and all frames should be marked as bad and erased.

Blocking characteristics

This selectivity test verifies that the receiver can perform in the presence of a

strong CW signal. The CW signal shall be any frequency >600 kHz away from

the wanted GSM signal.

Intermodulation characteristics

This selectivity test verifies that the receiver can perform in the presence

of a strong GSM and CW signal whose frequencies are selected to produce

in-channel intermodulation products.

AM suppression

This selectivity test verifies that the receiver can perform in the presence of a

strong GSM signal >6 MHz away.

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Agilent Technologies Switch/Measure Manual do Utilizador Página 33