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Hi ziphnor,

Signal Strength gives an indication of the relative level (voltage) of the signal and is usually expressed in db. Signal Quality is a measure of the bit error rate (BER) and a poor, or fluctuating, SQ will certainly produce "stutters" in the viewed image.

It is quite possible to have a good Signal Strength reading (~20db), but still get stutters, because the Signal Quality is poor.
The Signal Quality can be poor (< 80%) if there is a lot of EMR interference mixed with the TV signal. This interference can be caused by other electrical devices nearby (some people have suggested that their wireless LAN card causes interference), or by insufficient shielding of the TV signal from the antenna to the TV receiver. This is why quad-shielded cable, top quality shielded splitters and screw connectors are specified for a digital TV aerial installation.

If your Signal Strength is OK (clear, snow-free signal on analogue) and you are getting stutters, I would recommend that you upgrade the whole aerial installation to digital standard. Or find the source of the EMR interference and eliminate it.... :?

HTH...

<blockquote data-quote="Taipan" data-source="post: 39362" data-attributes="member: 11681">Hi ziphnor,Signal Strength gives an indication of the relative level (voltage) of the signal and is usually expressed in db.&nbsp; Signal Quality is a measure of the bit error rate (BER) and a poor, or fluctuating, SQ will certainly produce &quot;stutters&quot; in the viewed image.It is quite possible to have a good Signal Strength reading (~20db), but still get stutters, because the Signal Quality is poor.&nbsp; The Signal Quality can be poor (&lt; 80%) if there is a lot of EMR interference mixed with the TV signal.&nbsp; This interference can be caused by other electrical devices nearby (some people have suggested that their wireless LAN card causes interference), or by insufficient shielding of the TV signal from the antenna to the TV receiver.&nbsp; This is why quad-shielded cable, top quality shielded splitters and screw connectors are specified for a digital TV aerial installation.If your Signal Strength is OK (clear, snow-free signal on analogue) and you are getting stutters, I would recommend that you upgrade the whole aerial installation to digital standard.&nbsp; Or find the source of the EMR interference and eliminate it.... :?HTH...</blockquote>

[QUOTE="Taipan, post: 39362, member: 11681"] Hi ziphnor, Signal Strength gives an indication of the relative level (voltage) of the signal and is usually expressed in db. Signal Quality is a measure of the bit error rate (BER) and a poor, or fluctuating, SQ will certainly produce "stutters" in the viewed image. It is quite possible to have a good Signal Strength reading (~20db), but still get stutters, because the Signal Quality is poor. The Signal Quality can be poor (< 80%) if there is a lot of EMR interference mixed with the TV signal. This interference can be caused by other electrical devices nearby (some people have suggested that their wireless LAN card causes interference), or by insufficient shielding of the TV signal from the antenna to the TV receiver. This is why quad-shielded cable, top quality shielded splitters and screw connectors are specified for a digital TV aerial installation. If your Signal Strength is OK (clear, snow-free signal on analogue) and you are getting stutters, I would recommend that you upgrade the whole aerial installation to digital standard. Or find the source of the EMR interference and eliminate it.... :? HTH... [/QUOTE]