共找到 189 条与 微波通信设备 相关的标准,共 13 页
本标准规定了自立式微波铁塔(角钢结构)的质量等级及其要求。 本标准适用于自立式微波铁塔,是考核铁塔质量等级的依据。 本标准不适用于产品质量分选。
Quality grading criteria of microwave tower
Gives methods of measurement of electrical characteristics: antenna gain, radiation patterns, cross-polarization discrimination, return loss, multi-port antenna isolation. The methods described are suitable for both line-of-sight and tropospheric scatter
Methods of measurement for equipment used in digital microwave transmission systems - Part 2: Measurements on terrestrial radio-relay systems - Section 2: Antenna
Specification for verification of microwave relay tester
The document describes methods of measurement applicable to satellite earth station systems using digital modulation.
Methods of measurement for equipment used in digital microwave radio transmission systems; part 3: measurements on satellite earth stations; section one: general (IEC 60835-3-1:1990); German version EN 60835-3-1:1992
Methods of measurement for equipment used in digital microwave radio transmission systems; part 2: measurements on terrestrial radio-relay systems; section one: general (IEC 60835-2-1:1990); German version EN 60835-2-1:1992
Methods of measurement for equipment used in digital microwave radio transmission systems; part 1: measurements common to terrestrial radio-relay systems and satellite earth stations; section one: general (IEC 60835-1-1:1990); German version EN 60835-1-1:
Interoperability and performance standards for digital LOS microwave radio equipment
The measurements described are concerned with output frequency, R.F. output spectrum, R.F. outpout power, phase/amplitude error (for transmitters including modulators), local oscillator frequency, R.F. leakage spectrum, A.G.C. characteristic, selectivity
Methods of measurement for equipment used in digital microwave radio transmission systems; part 2: measurements on terrestrial radio-relay systems; section 4: transmitter/receiver including modulator/demodulator
The measurement methods described (measurements on PCM channel codec, of I.F. sub-system characteristics, of bit-error ratio, of cycle-skipping performance) are applicable to SCPC-PSK equipment used in international satellite systems. Most of the methods
Methods of measurement for equipment used in digital microwave radio transmission systems; part 3: measurements on satellite earth stations; section 9: terminal equipment SCP-PSK
The measurements described are intended to characterize the system equalizer in the presence of selective fading and may also be performed on systems without adaptive equalizers. To take account of those properties of the system which are especially infl
Methods of measurement for equipment used in digital microwave radio transmission systems; part 2: measurements on terrestrial radio-relay systems; section 8: adaptive equalizer
The methods of measurement described relate to the following principal functions of the sub-system: multiplexing of two or more bit streams, transmission quality evaluation for switching purposes and/or alarm indicating signal (AIS) insertion, coding and
Methods of measurement for equipment used in digital microwave radio transmission systems; part 2: measurements on terrestrial radio-relay systems; section 5: digital signal processing sub-system
The 2048 kbiüs test signal shall be modulated by sinusoidal jitter. The equivalent binary content of the test signal
Characteristics of a Synchronous Digital Multiplex Equipment Operating at 2048 kbit/s - General Aspects of Digital Transmission (Study Group XV) 9 pp
Methods of measurement for equipment used in digital microwave radio transmission systems; part 2: measurements on terrestrial radio-relay systems; section 3: RF branching networks (IEC 835-2-3:1992)
本标准规定了2TW8-1型数字微波接力设备产品分类、技术要求、试验方法、检验规则和标志、包装、运输、贮存等基本要求。 本标准适用于2TW8-1型数字微波接力设备及同类型设备。 本设备用于各工业部门建立长2500km的干线及各种专用通信线路,可传送PCM二次群或PCM基群的语音编码信号。
Type KHG lever style slide switches, detail specification for
Networking requirement for point-tc-multipoint radio telecommunication systems
Specification for verification of microwave system analyzers
The characteristics given below are recommended for encoding voice-frequency signals.
Pulse Code Modulation (PCM) of Voice Frequencies - General Aspects of Digital Transmission Systems; Terminal Equipments Study Groups XV and XVIII; 12 pp
Specification for verification of wave guided standard mismatch load
Specification for verification of ME62A model microwave testing devices
This erram contains typographical corrections that are needed in ITU-T Rec. G.722 (1988). The typos and the inadequate description of a figure were found in Fascicle 111.4 of the Blue Book (1988), and in the corresponding electronic files posted on ITU
7 kHz Audio-Coding within 64 kBit/s - General Aspects of Digital Transmission Systems; Terminal Equipments Study Group XV and XVIII; Covering Note May 30, 2003
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