Bird Technologies AT-500-Manual - Manual (Page 34)

Bird AT-500 Antenna Tester
16
AC Mains Adapter
To use the AC adapter, insert the adapter’s barrel con-
nector into the Antenna Tester’s DC jack. Insert the
adapter plug into a wall receptacle.
Automobile Cigarette Lighter Adapter Cable
Note:
Before inserting the adapter’s barrel
connector into the Antenna Tester’s DC jack
(Figure 4), verify that the polarity of the adapter
barrel is correct (Figure 4). The negative (–) sym-
bol must be adjacent to the word TIP as the cen-
ter is negative and the outside is positive.
Insert the adapter plug into a cigarette lighter.
Figure 4 Cigarette Lighter Adapter Cable
Tip Connection
CAUTION
Required input is 11 to 16 VDC @ 250mA. Connector
is wired outside positive, inside negative.
CORRECT
WRONG !!
POSITIVE VOLTAGE AT CENTER CONDUCTOR OF ADAPTER BARREL
NEGATIVE VOLTAGE AT CENTER CONDUCTOR OF ADAPTER BARREL