標(biāo)準(zhǔn)號：IEC 60835-2-4 Edition 1.1-1998
中文標(biāo)準(zhǔn)名稱：數(shù)字微波無線電傳輸系統(tǒng)使用設(shè)備的測量方法.第2-4部分:地面無線電中繼系統(tǒng)的測量.包括調(diào)制器/解調(diào)器的發(fā)射機(jī)/接收機(jī)
英文標(biāo)準(zhǔn)名稱：Methods of measurement for equipment used in digital microwave radio transmission systems - Part 2-4: Measurements on terrestrial radio-relay systems; Transmitter/receiver including modulator/demodulator
標(biāo)準(zhǔn)類型：M34
發(fā)布日期：1999/12/31 12:00:00
實(shí)施日期：1999/12/31 12:00:00
中國標(biāo)準(zhǔn)分類號：M34
國際標(biāo)準(zhǔn)分類號：33.060.30
適用范圍：This Section of IEC 60835-2 deals with methods of measurement for transmitters including modulators, and receivers including demodulators, used in digital radio-relay systems. Measurements for adaptive equalizers are given in IEC 60835-2-8. Methods of measurement for the a.g.c. characteristic, selectivity and noise figure and receiver local oscillator frequency are generally applicable only when the receiver i.f. output is accessible. This may not be the case for receivers used in systems having a microwave demodulator or a low bit rate, e.g. below 2 Mbit/s.