TM 11-6625-2946-14/TM 08168A-14/1
Section Ill. OPERATING PROCEDURES
the test set. Release FUNCTION switch.
2-5. Preliminary Starting Procedure
d. Place the test set POWER switch to OFF position.
Preset the test set operating controls as follows:
POSITION
CONTROL
2-7. Operating From 24V External Power
OFF
POWER switch
RESET
Circuit breaker
Supply
any
FUNCTION switch
a. Connect the output cable from the external 24-vdc
any
FREQUENCY CODE switches
power supply to the 24 VDC EXT connector on the test
set.
2 - 6 . Field Operation (14V Battery)
b. Turn on external power supply.
a. Connect a 14-volt battery (from the radio set)
c. Place the test set POWER switch in the EXT posi-
directly to the test set BATTERY connectors. The con-
tion. Place and hold the FUNCTION switch in the BAT
nectors will support and retain the battery on the test set
position and observe the meter reading. A reading in the
front panel.
green portion of the meter scale indicates an adequate
b. Place the POWER switch in the BAT position.
external power source and that the test set is ready for
c. Place and hold the FUNCTION swtich in the BAT
use. Release the FUNCTION switch.
position and observe the test set reading. A reading in the
d. Place the test set POWER switch in the OFF posi-
red portion of the meter scale indicates a weak battery
tion.
that should be replaced prior to use of the test set. A
NOTE
reading in the green portion of the meter scale indicates
The remaining test set operating procedures are
that the battery output is satisfactory for operation of
given in the AN/PRC-68 Technical Manual,
TM 1 l-5820-882-23/TM 06827A-23/2.
2-3
