Page 3-6
500 SERIES INSTALLATION MANUAL
Page Rev. B
P/N 190-00181-02
3.8 500 SERIES UNIT INSERTION AND REMOVAL
It may be necessary to insert the hex drive tool into the access hole and rotate the mechanism 90°
counterclockwise to insure correct position prior to placing the unit in the rack. The 500 Series unit is
installed in the rack by sliding it straight in until it stops, about 1 inch short of the final position. A 3/32”
hex drive tool is then inserted into the access hole at the bottom of the unit face. Rotate the hex tool
clockwise while pressing on the left side of the bezel until the unit is firmly seated in the rack.
To remove the unit from the rack, insert the hex drive tool into the access hole on the unit face and rotate
counterclockwise until the unit is forced out about 3/8” and can be freely pulled from the rack.
Be sure not to over tighten the unit into the rack. The application of hex drive tool torque exceeding
15 in•lbs can damage the locking mechanism.
3.9 COM ANTENNA INSTALLATION CHECK (GNC 520 AND GNS 530)
Check for insertion loss and VSWR (voltage standing wave ratio). VSWR should be checked with an in-
line type wattmeter inserted in the coaxial transmission line between the transceiver and the antenna. Any
problem with the antenna installation will most likely be seen as high reflected power. A VSWR of 3:1 will
result in a 25% loss in power.
