
ITU
搜尋結果:找到 7840 筆資料
- 【組 織】ITU
- 【文件編號】ITU-T I.253. 1
ITU-T I.253.
- 【日 期】1990/7/1
- 【語 言】English
- 【狀 態】Active
- 【組 織】ITU
- 【文件編號】ITU-T I.255. 3
ITU-T I.255.
- 【日 期】1990/7/1
- 【語 言】English
- 【狀 態】Active
- 【組 織】ITU
- 【文件編號】ITU-T I.255. 4
ITU-T I.255.
- 【日 期】1990/7/1
- 【語 言】English
- 【狀 態】Active
- 【組 織】ITU
- 【文件編號】ITU-R F.348-4
Arrangement of Channels in Multi-Channel Single-Sideband and Independent-Sideband Transmitters for Long-Range Circuits Operating at Frequencies Below About 30 MHz - Section 3Aa - Technical Characteristics
- 【日 期】1990/6/1
- 【語 言】English
- 【狀 態】Active
- 【組 織】ITU
- 【文件編號】ITU-R BS.644-1
Audio Quality Parameters for the Performance of a High-Quality Sound-Programme Transmission Chain - Section 10C - Audio-Frequency Characteristics of Sound-Broadcasting Signals
- 【日 期】1990/6/1
- 【語 言】English
- 【狀 態】Active
- 【組 織】ITU
- 【文件編號】ITU-R F.695
Availability Objectives for Real Digital Radio-Relay Links Forming Part of a High-Grade Circuit within an Integrated Services Digital Network - Section 9A - Performance Objectives, Propagation and Interference Effects
- 【日 期】1990/6/1
- 【語 言】English
- 【狀 態】Active
- 【組 織】ITU
- 【文件編號】ITU-R BS.703
Characteristics of AM Sound Broadcasting Reference Receivers for Planning Purposes - Section 10A-1 - Amplitude-Modulation Sound-Broadcasting in Bands 5 (LF), 6 (MF) and 7 (HF)
- 【日 期】1990/6/1
- 【語 言】English
- 【狀 態】Active
- 【組 織】ITU
- 【文件編號】ITU-R BS.704
Characteristics of FM Sound Broadcasting Reference Receivers for Planning Purposes - Section 10B - Frequency-Modulation Sound Broadcasting in Bands 8 (VHF) and 9 (UHF)
- 【日 期】1990/6/1
- 【語 言】English
- 【狀 態】Active
- 【組 織】ITU
- 【文件編號】ITU-R BS.708
Determination of the Electro-Acoustical Properties of Studio Monitor Headphones - Section 10C - Audio-Frequency Characteristics of Sound-Broadcasting Signals
- 【日 期】1990/6/1
- 【語 言】English
- 【狀 態】Active
- 【組 織】ITU
- 【文件編號】ITU-T J.85
Digital Television Transmission over Long Distances - General Principles - Television and Sound Transmission - Formerly Recommendation ITU-R CMTT.604; Study Group 9; 3 pp
- 【日 期】1990/6/1
- 【語 言】English
- 【狀 態】Active