@ MTJR
Before I used my receiver I upgraded the firmware
http://www.ross.co.uk/upgrade/22300hd-r/ - the file's called 'miscBls.img'.
Simply put the file on an empty USB stick - pop it in the USB port and switch the receiver on. The file will load and install in about 3 or 4 minutes - afterwhich the receiver's display will show 0000. After a reboot and a pause of about 1 minute a channnel will appear on your tv! BBC 1 HD (on my set anyway) is channel 0008 - no need for any rescan or manual channel input. Signal strength is around 90-95% on all channels using an old SKY dish mounted on a wooden post. I didn't bother adjusting the elevation as I got a great picture after about 30 seconds of fiddling with the lateral position (azimuth?) using a sat strength meter.