Section Ill. SYSTEM ANALYSIS

NAVSHIPS 0967-217-4010

TM 11-5895-490-20

Figure 1-8, Test Set, Transponder Set TS-1843/APX.

The TS1843/APX (fig. 18) is an in-flight

C operation to prepare coded signals, indicating

test set that is used to indicate either satisfac-

aircraft pressure altitude in hundreds of feet,

tory or unsatisfactory performance of the over-

for transmission.

all transponder system on a go, no-go basis.

e. Power Supply. A source of primary power

Refer to manual NAVWEPS 16-35TS1843-

capable of supplying 27.5 vdc at 2.5 amperes or

1/T.O.12P42APX-152.

27.5 vdc at 2.5 amperes and 115 vac at 90 va,

400 10% cps is required to operate the power

g. Interconnecting Cables. Interconnecting

supply in the RT-859/APX72. The power is

cables with connectors to mate with the multi-

obtained from the aircraft or surface vessel

pin connector and the rf coaxial connector on

electrical system.

the RT-859/APX-72 are required. These cables

f. Test Set, Transponder Set TS-1843/APX.

are installed as part of the aircraft.

Section Ill. SYSTEM ANALYSIS

positive identification, position, altitude, and

1-9. General

emergency conditions (if they exist) of an air-

The RT-859/APX-72 is an integral part of

craft or surface vessel to an interrogating sta-

a transponder system which is used to present

1-8