PS Engineering PMA7000CAP Installation Manual - Manual (Page 25)

PS Engineering
PMA7000M-S Series Audio Selector Panel and Intercom System
Installation and Operator’s Manual for Civil Air Patrol
200-072-0004 Page 3-8 Rev. 4, Sept. 2000
A three position switch is used to set the receiver sensitivity and to test the indicator lamps. Use
"H
IGH " sensitivity initially. This allows you to hear the outer marker beacon about a mile out.
Then select the “L OW ” sensitivity to give you a more accurate location of the Outer Marker.
The momentary down switch position is labeled "T EST " and illuminates all three lamps
simultaneously to assure the lamps are in working order.