Sony KDS-R50XBR1 Training Manual page 116

To check the tuning status:

Enter service mode [Display]

+ [5] + [Vol. +] + [Power].
Press the [JUMP] button one

time to arrive at DM service
mode.
Press the [3] button seven

times to display the Front
End screen.
Key Items to check include:

Verify the In Band and OOB status are

"LOCK".
SNR (Signal to Noise Ratio): There is no

hard value to confirm signal strength is at
an acceptable level but as a rule of thumb
a SNR of >20 is usually acceptable. SNR
of 25->30 is preferred.
Note if uncorrected errors is high it could

indicate a weak or noisy signal is being
received and the DMB is unable to
correct. There is no hard value or
threshold value.
TVP-21
Confirming Tuning Status
Appendix
113