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The RST / Radio Reports
A "Rig Check" is the common slang term given to
someone requesting a on-air check for both their signal strength and the clarity
of the audio.
Readability
| R1 |
Unreadable |
| R2 |
Barely readable, occasional words distinguishable |
| R3 |
Readable with considerable difficulty |
| R4 |
Readable with practically no difficulty |
| R5 |
Perfectly readable |
Signal Strength
| S1 |
Faint, signals barely perceptible |
| S2 |
Very week signals |
| S3 |
Week signals |
| S4 |
Fair signal |
| S5 |
Fairly good signals |
| S6 |
Good signals |
| S7 |
Moderately strong signal |
| S8 |
Strong signals |
| S9 |
Extremely strong signals |
Tone
| T1 |
Extremely rough hissing note |
| T2 |
Very rough ac note, no trace of musicality |
| T3 |
Rough, low-pitched ac note, slightly musical |
| T4 |
Rather rough ac note, moderately musical |
| T5 |
Musically modulated note |
| T6 |
Modulated noise, slight trace of whistle |
| T7 |
Near dc note, smooth ripple |
| T8 |
Good dc note, just a trace of ripple |
| T9 |
Purest dc note |
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