05.053GPPRadio transmission and receptionTS
Unless otherwise stated, the requirements in this clause apply at all frequencies in the receive band 460.4 – 467.6 MHz for a GSM 450 AFLC, at all frequencies in the receive band 488.8 ‑ 496 MHz for a GSM 480 AFLC, at all frequencies in the receive band 925 ‑ 960 MHz for a GSM 900 AFLC, and at all frequencies in the receive band 1 805 ‑ 1 880 MHz, for a DCS 1 800 AFLC. For a multi band AFLC, which supports more than one of the GSM and DCS bands, the requirements apply in all of the receive bands supported.
With a GSM input signal at any level in the range ‑102 dBm to ‑20 dBm for a GSM 400 and GSM 900 AFLC and ‑100 dBm to ‑20 dBm for a DCS 1 800 AFLC, the gain shall be 0 dB with a tolerance of ±1 dB.
For test purposes, it is sufficient to use a CW signal to test this requirement.
F.3.2 Noise figure
The noise figure shall be less than 7 dB for a GSM 400 and GSM 900 AFLC and less than 7 dB for a DCS 1 800 AFLC.
F.3.3 Group delay
The absolute value of the group delay (signal propagation delay) shall not exceed 500 ns.
F.3.4 Intermodulation performance
The output third order intercept point shall be greater than ‑10 dBm.
The VSWR shall be less than 1.7:1 at the RF port of the device which is intended to be connected to the MS. The VSWR shall be less than 2:1 at the RF port of the device which is intended to be connected to the antenna.
The AFLC shall be unconditionally stable.