M31 载波通信设备 标准查询与下载

ITU-T O.111 SPANISH-1988 载波信道频移的测量设备

The equipment described below is compatible with the measuring method described in Annex A to this Recommendation.

FREQUENCY SHIFT MEASURING EQUIPMENT FOR USE ON CARRIER CHANNELS

ITU-T G.223-1988 关于电话假设参考电路上噪声计算的假设 国际模拟载波系统(研究15组)9pp

CCITT Recommendation Character error rate objective for telegraph communication using 5-unit start-stop equipment, Vol. II, Rec. F.lO.

Assumptions for the Calculation of Noise on Hypothetical Reference Circuits for Telephony - International Analogue Carrier Systems (Study Group XV) 9 pp

ITU-T G.233-1988 关于转化设备的建议.国际模拟载波系统(研究组XV)

This Recommendation concerns translating equipments with the exception of: - channel-translating equipment, in respect of which Recommendations G.232, G.234 Il] and G.235 should be consuIted; - equipment for translation into the line-frequency band; the Recommendations relating to the various line systems should be consulted.

Recommendations Concerning Translating Equipments - International Analogue Carrier Systems (Study Group XV) 10 pp

ITU-T G.421-1988 互连方法 国际模拟载波系统(研究15组)2pp

that in Europe, and also in other parts of the world, there is a vast international telecommunication network which (as well as national networks) has been established in conformity with the Recommendations of the CCI?T, particularly as far as the freque

Methods of Interconnection - International Analogue Carrier Systems (Study Group XV) 2 pp

ITU-T G.422-1988 在音频上互连 国际模拟载波系统(研究15组)2pp

The CCIR issued Recommendations 380 [i] and 381 [2] so that, as far as possible, radio-relay links using frequency-division multiplex should have characteristics which allow direct interconnection at baseband frequencies with systems of the same capacity

Interconnection at Audio-Frequencies - International Analogue Carrier Systems (Study Group XV) 2 pp

ITU-T R.49 SPANISH-1988 明线3路载波系统上的带际电报

The CCITT, considering it is considered necessary to introduce, for international traffic, an open-wire carrier system that uses common line repeaters for telephone and interband telegraph channels. This is important for some Administrations that desire to have a small number of telegraph channels (up to six) without having to use a standard voice-frequency telegraph system on one of the telephone circuits, thereby effecting an economy, as all the telephone circuits are retained entirely for telephone traffic.

INTERBAND TELEGRAPHY OVER OPEN - WIRE 3-CHANNEL CARRIER SYSTEMS

SJ 2810-1987 载波通信设备可靠性试验方法

本标准适用于预期寿命服从指数分布的载波通信设备的可靠性鉴定试验和可靠性验收试验。也适用于对已经定型投产的载波通信设备的可靠性测定试验。 本标准不适用于载波通信设备的可靠性增长试验。 本标准参照采用MIL-STD-781C《可靠性设计鉴定试验及产品验收试验(指数分布)》。

Test methods of reliability for carrier communication equipment

YD 331-1987 中同轴综合通信电缆配套12路载波通信设备通用技术要求

General technical requirement for supporting carrier communication equipment for standard coaxial integrated communication cables

IEC 60663:1980 单边带电力线载波系统的设计

Provides specific information on application, properties and performance of these systems and associated equipment and on precautions to be taken in order to ensure that PLC radiations do not interfere with other radiocommunication services. Several tabl

Planning of (single-sideband) power line carrier systems

ITU-R F.454-1 SPANISH-1978 高频(HF)单边带和独立单边带降低载波系统的导频载波标准.第3Aa部分:技术特性

The CCIR, CONSIDERING that although for conventional radiotelephone systems a level of -26 dB appears, theoretically, to be adequate, operational experience shows that significant improvements in operational time are secured with higher levels; that for radiotelephone systems employing a frequency-modulated control channel, further protection of the pilot carrier is necessary to ensure end-to-end circuit gain stability.

PILOT CARRIER LEVEL FOR HF SINGLE-SIDEBAND AND INDEPENDENT-SIDEBAND REDUCED-CARRIER SYSTEMS

ITU-R F.454-1 FRENCH-1978 高频(HF)单边带和独立单边带降低载波系统的导频载波标准.第3Aa部分:技术特性

The CCIR, CONSIDERING that although for conventional radiotelephone systems a level of -26 dB appears, theoretically, to be adequate, operational experience shows that significant improvements in operational time are secured with higher levels; that for radiotelephone systems employing a frequency-modulated control channel, further protection of the pilot carrier is necessary to ensure end-to-end circuit gain stability.

Pilot Carrier Level for HF Single-Sideband and Independent-Sideband Reduced-Carrier Systems - Section 3Aa - Technical Characteristics

IEC 60481:1974 电力线载波系统的耦合装置

Establishes definitions, requirements, methods of testing and rated values for this equipment. Gives details as to use under outdoor conditions, at a height above sea level not exceeding 1000 m and an ambient temperature between -25 degrees centigrade an

Coupling devices for power line carrier systems

BS 4996:1973 电源线载波通信系统用线路陷波器规范

Definitions, general requirements for main coil, tuning device and protective device; blocking requirements, temperature rise, ability to withstand short circuit, insulation level, tensile strength of suspension system. Rating plates, type and routine tests. Recommended values of rated quantities.

Specification for line traps for power line carrier systems

SJ/Z 9099-1987 单边带电力线载波系统设计

Design for carrier system of single-sideband power line