E.5 Frequency error and modulation accuracy

05.053GPPRadio transmission and receptionTS

This clause applies only to repeater systems using frequency shift. The single repeater as a sub unit within this repeater system has to comply with all specifications in this annex E.

E.5.1 Frequency error

This clause applies only to repeater systems using frequency shift.

The average frequency deviation of the output signal with respect to the input signal of the repeater system shall not be more than 0,1 ppm. The specified value applies to a complete repeater system signal path. Consequently a single repeater unit is limited to an average frequency deviation of not more than 0.05 ppm with respect to its wanted output frequency.

E.5.2 Modulation accuracy at GMSK modulation

This clause applies only to repeater systems using frequency shift.

For a complete repeater system operating at the nominal output power as specified by the manufacturer shall the increase in phase error of a GSM input signal, which meets the phase error requirements of subclause 4.6, not exceed the values in subclause 4.6 by 2 degrees RMS and by 8 degrees peak. For a single repeater unit operating at the nominal output power as specified by the manufacturer shall the increase in phase error of a GSM input signal, which meets the phase error requirements of subclause 4.6, not exceed the values in subclause 4.6 by 1.1 degrees RMS and by 4.5 degrees peak.

E.5.3 Modulation accuracy at 8-PSK modulation

This clause applies only to repeater systems supporting 8-PSK.

For a single repeater with no shift in frequency from input to output and operating at the nominal output power as specified by the manufacturer, the RMS EVM of the output RF signal for an ideal GSM 8-PSK input signal according to subclause 4.6, shall not exceed 8 %.

NOTE: Repeaters with higher RMS EVM value may be used in systems utilizing 8-PSK, if all other repeater requirements in this Annex are fulfilled. However, the system performance will be degraded.

For a complete repeater system using frequency shift and operating at the nominal output power as specified by the manufacturer, the RMS EVM of the output RF signal for an ideal GSM 8-PSK input signal according to subclause 4.6, shall not exceed 14.5 %. For a single repeater unit using frequency shift, operating at the nominal output power as specified by the manufacturer, the RMS EVM of the output RF signal for an ideal GSM 8-PSK input signal according to subclause 4.6, shall not exceed 12 %.

In addition the origin offset suppression according to Annex G shall not exceed –35 dBc.

Annex F (normative):
Antenna Feeder Loss Compensator Characteristics (GSM 400, GSM 900 and DCS 1800)