GB/T 4958.2-1988
Methods of measurement for equipment used in terrestrial radio-relay systems--Part 3: Simulated systems--Section Two Measurements in the basehand (English Version)

Standard No.

GB/T 4958.2-1988

Language

Chinese, Available in English version

Release Date

1988

Published By

General Administration of Quality Supervision, Inspection and Quarantine of the People‘s Republic of China

Status

Withdraw 2017-12

Latest

GB/T 4958.2-1988

Replace

SJ/Z 9094.11-1987

Scope

This section deals with measurements at the baseband of simulated radio-relay systems that are not directly related to the actual type of signal transmitted (eg frequency division multiplexed telephone and television signals). The baseband measurements described in this standard are generally measurements performed at the input of the modulator and the output of the demodulator, excluding attached terminal equipment, such as pre-emphasis networks and de-emphasis networks related to specific types of baseband signals. This section excludes random noise, periodic noise, and impulse noise measurements. Because these noise levels can only be meaningfully evaluated by passing the specific types of baseband signals associated with them, and using the corresponding de-emphasis and weighting networks. Measurements related to frequency division multiplexed telephone, television and sound programs are given in the corresponding chapters of Part III of this series of standards.

GB/T 4958.2-1988 history

• 1988 GB/T 4958.2-1988 Methods of measurement for equipment used in terrestrial radio-relay systems--Part 3: Simulated systems--Section Two Measurements in the basehand

GB/T 4958.2-1988 Methods of measurement for equipment used in terrestrial radio-relay systems--Part 3: Simulated systems--Section Two Measurements in the basehand has been changed from SJ/Z 9094.11-1987 Methods of measurement for equipment used in terrestrial radio-relay systems--Part 3: Simulated systems--Section 2: Measurements of baseband.

GB/T 4958.2-1988 -All Parts