signal strength

How to give a proper Signal Report.

Signal reports are normally reported as using R S T This refers to ‘R’eadabilty ‘S’trength and ‘T’one When operating in Phone Mode (Voice) it is normal practice to report only the Readability and signal Strength. Readability is reported using the following ‘scale’

1 = Unreadable
2 = Barely readable, occasional words distinguishable.
3 = Readable with considerable difficulty.
4 = Readable with practically no difficulty.
5 = Perfectly readable.

So a perfectly readable voice reception would be reported as a ’5′. If the received voice is maybe quiet or has a little noise along with it but is still readable and all words are still understandable you may give a reading of ’4′. When you are having trouble making out what the transmitting station is saying but still hearing enough to just make out what they are saying with a fair bit of difficulty you would report a ’3′ etc..
Signal strength is usually read from the S-Meter. EG: Looking at the LEFT S-Meter shown below: You are receiving a station and you can make out all that they are saying but the audio is not ‘Perfectly readable’ due to the audio being quiet or having some noise along with it you could report that their signal was 42 or 43 if the needle on the S-meter moved up to the ’3′ as they were speaking. Looking at the RIGHT S-Meter shown below: You are receiving a station ‘Perfectly’ with good clear clear audio you could report that their signal was a 55 or ‘five and five’ – If you are receiving them as ‘perfect’ audio and the S-Meter needle is past the 9, for example at the +20 mark, you would read the S-meter as 59 plus 20 dB. Of course if the audio was ‘Perfectly’ good and clear and the S-Meter needle was at the mark between the +20 and +40 you would report the signal strength as 59 plus 30dB. – The ‘T’ of ‘RST’ is for reporting the received signal Tone and is only used when reporting CW (Morse) signal reception. This is done according to the following scale with a range from 1 to 9 something like this:

1 = Sixty cycle a.c or less, very rough and broad.
2 = Very rough a.c. very harsh and broad.
3 = Rough a.c. tone, rectified but not filtered.
4 = Rough note, some trace of filtering.
5 = Filtered rectified a.c. but strongly ripple-modulated.
6 = Filtered tone, definite trace of ripple modulation.
7 = Near pure tone, trace of ripple modulation.
8 = Near perfect tone, slight trace of modulation.
9 = Perfect tone, no trace of ripple or modulation of any kind.

So when using Phone mode (voice) you only report the R and S as described above and you do not use the ‘T’one part of the report… Accurate signal reporting is an important part of radio communications procedure and It is very easy when you get used to it. I hope this helps operators to give correct signal reports..

S-meters

S-meters

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