People have mentioned this briefly in a couple of previous posts. I was about to post this in reply to a question in another thread, but think this information is more appropriate here. (Many people here have likely already discovered this, but for those who haven't, and for the search engines...)
I recently got a Sony KDF-42WE655.
The "diagnostics" function is under the "application" menu. The only thing the manual says about it is:
Display diagnostics information about the TV. This can be useful in providing information to an authorized technician or repair person.
It would have been nice if they mentioned that it shows signal strength; the implication is that there's no information there that the owner would find useful. I sure found it useful in pointing my antenna!
When the TV is tuned to an SD (NTSC) broadcast or any of the video inputs, this menu option isn't even available -- it's ghosted. If you start on a DTV channel but change to an SD channel, you'll pop out of this menu.
When on a DTV channel on the Antenna
input, it shows:
- Signal Strength -- both a number and a bar graph, along with a dot that shows the peak value
- Phy. Ch: -- physical broadcast channel number, e.g. "51"
- Freq. (KHz): -- the channel frequency, e.g. 695000
- Modulation: -- e.g., "8VSB"
- Status: -- "Locked" or "Unlocked"
- Errors: -- count, resets quickly to 0
- SNR (dB): -- Signal to Noise Ratio
- AGC (%): -- Automatic Gain Control level
When on the Cable
input, it shows two columns -- the above list (except no signal strength) on the left, with the heading "In Band (FAT)", and the following on the right, with heading "Out of Band (FDC)":
- Freq. (KHz):
- Symbol Rate:
- Bit Rate (kbps):
- SNR (dB):