数字传输分析仪 HP3784A

厂家: 美国惠普

该仪表可在704Kbit/S,2,8,&34Mbit/s各速率上按G.821要求进行误码分析,也可对2,8,&34Mbit/s信号进行抖动测试。可自动进行输入抖动容限和抖动传递函数测试并自动绘出相应曲线,利用内部合成源可以对1Kbit/s到50Mbit/s的信号进行测试。

HP3784A可用选件的DS1，DS1C，和DS2和DS3，以北美速率（North Amerian rates）取代标准速率。另外它具有用于高达50Mb/s测量的TTL/ECL接口，使用的内部时钟合成器。可以得到用于SONET的特殊选配件，以用于STS1，DS3，DS1C的误码和抖动测量。HP3784A便于把测量与预置值、自动接收机装置和错误性能通过/失败门限值一起使用。自动抖动偏差和模板子程序用作快速精确测试，达到CCITT极限值。直通数据方式能够把抖动附加到成帧信号，以用于解复用器抖动容限的测试。

测量功能概要

一、误码分析功能
Error count, error ratio, error and error-free intervals (seconds and deciseconds), percent unavailability, percent errored and percent severely-errored seconds, percent degraded minutes. All measurements are made simultaneously.

二、抖动分析功能
Peak-to-peak amplitude(峰-峰幅度), jitter-hit count(抖动-冲击数), jitter-hit and hit-free seconds or deciseconds(抖动冲击和无冲击秒).

• 根据CCITT G.821 误码分析在速率 704 kb/s, 2, 8, 34 Mb/s
• 可选抖动发生和测量功能 在速率 2, 8, 34 Mb/s
• 时钟同步从 1 kb/s 到 50 Mb/s
• 可选 V.11 接口 用于测试 X.21 leased circuits

HP3784A is a portable error performance/jitter test set, offering standard telecom interfaces at 704 kb/s, 2, 8, and 34 Mb/s, with the option of codirectional interfaces at 64 kb/s and V.11 interfaces for testing X.21 leased circuits. In addition, it has binary TTL/ECL interfaces for measurements up to 50 Mb/s, using the internal clock synthesizer.

HP3784A is easy to use with measurement presets, automatic receiver setup and error performance pass/fail thresholds. Automatic jitter tolerance and transfer plotting routines are provided for fast accurate testing up to and beyond CCITT limits. Through-data mode allows jitter to be added to a structured signal for jitter tolerance testing of demultiplexers.

应用

• Automated production test of transmission line and terminal equipment
• Development and test of digital circuits that transport or store data
• Long-term monitoring of digital transmission equipment in the field

特殊选件

Special versions offer error and jitter measurements at North American and binary interfaces, using unframed data. They provide all the features of the standard instrument with North American data rates, DS1 (1.544 Mb/s), DS1C (3.152 Mb/s), DS2 (6.312 Mb/s) and DS3 (44.736 Mb/s), replacing the European data rates. Another version offers STS1 (51.84 Mb/s) for testing SONET equipment.

Automatic and manual jitter measurements offer a fast, accurate means of characterizing digital transmission equipment. In addition, jitter can be added to any standard data signal passing through the instrument to allow testing of demultiplexers with a framed signal.

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