INTERMEDIATE LESSON 23logomidi2.gif

             
LEARNING  OBJECTIVES and NOTES
Social issues of interference
7d.1 Understand that the station log will be of considerable assistance in dealing with complaints of interference, and that this is a good reason to keep a log of all transmissions.
Although it is no longer necessary to keep a station log, there are advantages when it comes to interference. If you do receive a complaint from a neighbour in the form of, " last Tuesday evening I couldn't watch  news at 10.00 because of interference from your transmitter."
Check in your log to see if you were transmitting on Tuesday night at 10.00. If the answer is no, then you are not the source of the interference. If the answer is yes you can check which band, frequency, power and mode you were using. This is a starting point to solving the problem.

7d.2 Understand the merits of the amateur and the complainant keeping a log of the instances of interference. Understand the merit of conducting tests in co-operation with the complainant in instances of interference.
One route to curing interference is to ask the person experiencing the problem to keep their own log of when they receive interference.
The next step, if your neighbour agrees, is to conduct tests. Try different frequencies, power settings, modes and antennas to find out where the problem lies. Do not install filters etc into your neighbours equipment.

7d.3 Recall that the RSGB and Ofcom produce information leaflets on EMC and interference.
Recall that advice is available from the RSGB EMC Committee and the role of local Ofcom officers in dealing with cases of interference.

There are several sources of support to help remove interference:
1. The RSGB produce information - see their website http://www.rsgb.org/emc/are-you-getting-interference.php
2. The RSGB EMC Committee can offer advice http://www.rsgb.org/emc/contact-the-emc-committee.php
3. If you cannot solve the problem, then you should ask your neighbour to contact Ofcom. They will probably start by checking your station and operating procedure, so it is good idea to make sure you have started a log and carried out all the checks on your transmitter. Ofcom will advice you on how to cure any problems they might encounter. If Ofcom find you are operating under the terms of the licence and that you equipment meets the necessary requirements they will than  contact the complainant and offer advice to them.
The RSGB wants to establish the full extent of interference to the radio spectrum from data-over-mains and other interfering devices; we are therefore asking everyone who is experiencing local interference to help us.

Are you getting interference
http://www.ofcom.org.uk/contact-us/

Ofcom
Riverside House
2a Southwark Bridge Road
London
SE1 9HA