C.5 Variation of gain with input level

03.503GPPTransmission planning aspects of the speech service in the GSM Public Land Mobile Network (PLMN) systemTS

C.5.1 Sending

The handset is mounted at LRGP and the earpiece is sealed to the knife‑edge of the artificial ear.

A sine‑wave signal with a frequency in the range 1 004 Hz to 1 025 Hz is applied at the MRP. The level of this signal is adjusted until the output of the terminal is –10 dBm0. The level of the signal at the MRP is then the ARL.

The test signal shall be applied at the following levels: ‑45, ‑40, ‑35, ‑30, ‑25, ‑20, ‑15, ‑10, ‑5, 0, 5, 10, 13 dB relative to ARL.

The variation of gain relative to the gain for ARL is measured.

NOTE: Selective measurement may be used to avoid the effects of ambient noise.

C.5.2 Receiving

The handset is mounted at LRGP and the earpiece is sealed to the knife‑edge of the artificial ear.

A digitally simulated sine‑wave signal with a frequency in the range 1 004 Hz to 1 025 Hz shall be applied at the digital interface at the following levels: ‑50, ‑45, ‑40, ‑35, ‑30, ‑25, ‑20, ‑15, ‑10, ‑5, 0, 3 dBm0.

The variation of gain relative to the gain at an input level of –10 dBm0 shall be measured at the ERP.

NOTE: Selective measurement may be used to avoid the effects of ambient noise.