Abstract: Application Note 338 provides the criteria used to set and clear alarms using the Dallas Semiconductor/Maxim DS2141A T1 Controller and DS2151 Single Chip Transceiver (SCT). Alarm Set Criteria Clear Criteria Blue Alarm (AIS) (see note 1 below) when over a 3ms window, 5 or less zeros are received when over a 3ms window, 6 or more zeros are received Yellow Alarm 1. D4 bit 2 mode (RCR2.2 = 0) when bit 2 of 256 consecutive channels is set to zero for at least 254 occurrences when bit 2 of 256 consecutive channels is set to zero for less than 254 occurrences 2. D4 12th F–bit mode (RCR2.2 = 1; this mode is also referred to as the "Japanese Yellow Alarm") when the 12th framing bit is set to one for two consecutive occurrences when the 12th framing bit is set to zero for two consecutive occurrences 3. ESF mode when 16 consecutive patterns of 00FF hex appear in the FDL when 14 or less patterns of 00FF hex out of 16 possible appear in the FDL Red Alarm (RCL) (this alarm is also referred to as Loss Of Signal) when 192 consecutive zeros are received when at least 12.5% one's density is received Notes: The definition of Blue Alarm (or Alarm Indication Signal) is an unframed all ones signal. Blue alarm detectors should be able to operate properly in the presence of a 10-3 error rate and they should not falsely trigger on a framed all ones signal. The blue alarm criteria in the DS2141A and DS2151 has been set to achieve this performance. 관련 부품   APP 338: Aug 10, 2001 DS2141A T1 컨트롤러 전체 데이터 시트 (PDF, 480kB) 무료 샘플 자동 업데이트 관심 분야의 애플리케이션 노트가 나올 때 자동으로 업데이트를 원하십니까? 그렇다면 EE-Mail™을 신청하십시오. We Want Your Feedback! 의견을 보내주세요! 위 내용이 도움이 되셨나요? 여러분의 의견을 기다립니다 — Maxim은 보내주신 정정이나 제안사항을 반영하고 있습니다. 이 페이지를 평가하고 의견을 보내주십시오.   다운로드, PDF 형식 (23kB)  AN338, AN 338, APP338, Appnote338, Appnote 338