OFCOM & Frequencies

I am not going to lie, when applying for a frequency it can be frustrating as you are dealing with a government department, I suggest a lot of coffee and a tin of chocolate buiscuits may help! But it will be worth it in the end.

There are licence free frequencies 869MHz and around the 450MHz range (UK Licence Free Frequencies (XL explanation) or see IR 2030 (page 29) ) - and whist these are free you must take into consideration where you are going to use them, as the airways are getting busier and busier as time goes on.  

If you are in a built up area I would avoid them, as the chance of interference from another source is highly likely.  (869MHz is used from garage door openers, baby alarms, some wifi even some toys) If you are in a remote area then obviously you can give them a go, and with the EASy you can try these first and then move to a licenced channel later if required.  Also remember 869 wont go as far as 450.

If you are mission critical always go for a licence. See  OFCOM , this page has a fee calculator and the form you need is OFW430  Once you have a licence, you pay an annual fee and you are guaranteed that no one else will use that channel. 


With publicly available ‘free to use’ channels they could well be occupied in your local area. The easy way to check for a ‘quiet’ channel is to plug in a modem but not send any signal data to it and just watch the CD light. If this flashes red or amber then there is another carrier on that channel. I would suggest starting at the upper end of the available frequencies (458.925) and checking down through the list. Ideally you should separately check that the channel is quiet at both ends.

Note that the modems can sometimes ‘falsely’ detect a carrier by picking up signals from other local electronic equipment (telephones, computers etc.). this effect is limited to a range of a couple of metres at most, so if you see lots of busy channels try moving the modem to a location away from any such equipment.

Alternatively for scanning the free channels, you can use Free Channel Scan software. (It is in text format, please change extension to exe) Click here for the User Guide

It uses radio modem receiver for measure the signal/noise levels. In the modem settings, SL commands must be on.

If you need a copy of a certificate from outside the EU then please ask us to link you to our Satel for Customers dropbox where there is a full copy of most of the countries available for download


Please remember that it is the customers responsibility to ensure that the chosen radio frequency is clear and available for use, and that any required fees are paid and correct licences obtained.  Xl Systems Ltd. accepts no responsibility or liability for system failure or legal procedings either due to radio interference from a third party, or failure to comply to logal regulation

© XL Systems 2014