Technical Guidance Note 30

TOPIC: TCF for a rack with several independent modems.

ISSUE: 3

REVISION DATE: 27.1.98

PREVIOUS REVISION DATE: 14.2.96

BACKGROUND: We are currently writing a TCF for a rack into which several independently running card type modems are mounted. The maximum rack configuration is 2 master modems and 15 slave modems.

PROBLEM: Can EMC behaviour be assessed by fitting just one master and one slave?

GUIDELINES: The EMC performance of the system must comply with the requirements for both emissions and immunity. Testing should be based upon a worst case system(s). This may or may not be a fully populated system.

SUPPORTING INFORMATION: A starting point for the analysis of worst case might be based upon the range of configurations actually sold and consideration of the standard ETS 300 127: January 1994, "Equipment Engineering (EE); Radiated emission testing of physically large telecommunication systems".

Disclaimer
No responsibility or liability can be accepted by the EMC Test Laboratories Association or any of its officers or members for the contents, specifications and/or advice referred to or contained in this Technical Memorandum and/or action taken as a result of information contained in this Technical Memorandum. Note that:
1. The Association is not by supplying this Technical Memorandum providing professional advice or guidance to any specific party on any specific matter and no legal relationship is created by the provision of this Technical Memorandum.
2. Parties should take specific advice when dealing with specific situations and consult their own professional advisors in this regard.
3. Members are free to deviate from the above guidelines where they think it appropriate, unworkable, or not commercially viable. Under these circumstances, the EMCTLA Secretariat should be informed of the reasons for the deviation so that the matter can be reviewed.