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Operation & Service Organizational, GS & Depot Maintenance Manual with Illustrated Parts Breakdown; Test Set, Transponder Set AN/APM-239A

2-1. 
2-2. 
SCOPE. 
This section contains the information required for unpacking, inspecting, and siting the test set. 
Infor- 
mation concerning power considerations and pre-operational checkout procedures is also provided. 
2-3. UNPACKING. 
2-4. No special instructions are required to remove the test set transit case from its shipping container, 
other than the usual precautions for unpacking delicate electronic equipment. After the transit case is un- 
packed, the cover should be operated and a visual inspection should be made to ensure that no shipping damage 
has occurred such as broken switches or controls, or loose panel connectors. A check should be made for 
completeness of equipment using the enclosed packing list and the information contained in and 1-4. 
Refer to the USAGE AND QTY columns to determine the quantities of accessory items provided 
with each over-all test set. 
2-5. SITING. 
2-6. The test set is designed for use on a work bench, together with components of the transponder set under 
test and other required simulators and test equipment. Space requirements can be determined from figures 
1-2 and 2-1. Arrange the test set and other required equipment to permit ease of access to controls and con- 
nectors. Since all of the controls, indicators, and connectors are accessible from the front panel, no special 
clearance arrangements are required at the rear or sides of the test set case. 
2-7. POWER CONNECTOR ASSEMBLY. 
2-8. Power cable W3, as shipped with the test set, requires the addition of a power connector which will 
mate with the particular type of I IS-volt, 400-Hz power outlet available at the site where the equipment is to be 
used. for input power requirements. 
WARNING 
Use care when working on the 1 15-volt a-c line connections. Serious in- 
jury or loss of life may result from contact with this voltage. When 
making connections to cable W3, be sure that the white wire (No. 3) is 
grounded to eliminate a possible shock hazard.