Visually ensure that ALT enters track (the ALT should stop scanning and point towards operator).
Set CODE thumbwheel switches on control panel to 687.
Verify that ALT starts scanning again.
Return CODE thumbwheel switches on control panel to 688, and verify that ALT reenters track.
Do not view laser simulator through TSU, as possible eye damage could occur.
Place ACQ (acquire) switch (fig. 3-10) located on gunner's instrument panel to ALT position.
Figure 3-10. ACQ Switch Location.