You need to provide more information. What country are you in? You mentioned an "arial." If your country has digital broadcast stations do you have the correct type of antenna? What brand/model DVD Recorder do you have? Does your DVD recorder have a tuner compatible with the broadcast system in your country?
In the USA full power analog broadcasting with the NTSC standard has been discontinued. Full power broadcasting is now with the digital ATSC standard. DVD Recorders manufactured for sale in the US prior to 2007 most likely have only a NTSC tuner. You might need a digital to analog converter box that tunes ATSC signals and converts them to NTSC. Many millions of those ATSC Coupon Eligible Converter Boxes were sold in in the US during 2008 and 2009.
If your programming source is through a cable or satellite the cable converters or satellite receivers provide analog outputs that may be recorded with older DVD Recorders.