Phantom-T, C430, C435, – The “T” light will light up during the start up with a soft chirp sound. When hit by radar/laser the light will not come on again. C475 & C495 – Will display the word “SCRAMBLE” with a soft chirp. Also at the end of start up mode it will display “SCRM ON”. The Judge will display “Scrambler Test” at start up. All these units will not alert you when scrambling. You will not see the “T” nor the word “SCRAMBLING”.