Numark NS7 Reference Manual page 38

6. Set all faders and knobs to the minimum or left-most position. The PITCH FADERS should be at the top, which is their minimum.
The left Deck's HOT CUE BUTTON 1 will light up.
7. Press the lit left Deck's HOT CUE BUTTON 1. It will flash twice.
8. On the left Deck's STRIP SEARCH sensor:
a. Touch and hold the right-most position. When the left Deck's HOT CUE BUTTON 1 lights up, press it. It will flash twice.
b. Touch and hold the left-most position. When the left Deck's HOT CUE BUTTON 1 lights up, press it. It will flash twice.
c. Touch and hold the exact center position. When the left Deck's HOT CUE BUTTON 1 lights up, press it. It will flash twice.
9. Repeat Steps 8a-c with the right Deck's STRIP SEARCH sensor.
b c
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a