The DTVPal has a numeric signal strength. However, if it can't actually decode the channel then it doesn't show a signal strength, i.e. it will only show a signal strength for channels it can actually display, you can't use it to find a borderline station that you might be able to get if you tweek something (i.e. adjust you antenna, remove a splitter, etc.). My Zenith DTT-900 doesn't show numbers, but it shows a bar graph, and it will show signal strength for digital tv stations that are not strong enough for it to decode.