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Not to hijack this thread, but do you know of a shortcut to the Sony signal diagnostics, or do I always need to go through all 11 steps to get there, every time I switch channels?
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Good question; it does take a lot of steps, and I haven't found a shortcut. Different models have it in slightly different places, and the information given by the screen has changed because each design team is able to do it the way they want.
My latest model is the KDL32R400A.
Home > up button > enter for Settings >up button twice for Setup > enter > up button for Product Support > enter >up button for Signal Diagnostics > enter
The screen gives readings for digital OTA 8VSB and for digital clear QAM cable, like this:
The latest version is my favorite because the signal strength range is much greater than the previous models that derived the strength readings from the IF AGC. The strength steps are about one dB each, which is very useful for antenna experiments.
I made a calibration chart giving dBm and dBmV values for the strength readings:
The signal strength range for the KDL22L5000 shown in post # 9 is much less. Once the reading gets to 79, which is about -4 dBmV (-53 dBm) it doesn't go any higher no matter how strong the signal. See Attachment 3.