Revision A
T-48 90 008 026
1-1
CHAPTER I
INTRODUCTION
SECTION A
1.1
Scope of Manual
The intent of this Manual is to familiarize the operator with the operating and maintenance procedures
necessary to utilize the T-48/T-48A MOD3 Test Set.
50-400 HZ, SINGLE PHASE
120/220 VAC, 25 WATTS
120 VAC- 0.25 FTT, 220 VAC-0.125 FTT
T-48
MODE S/ATCRBS
TRANSPONDER RAMP
TEST SET
TEL-INSTRUMENT ELEC. CORP
TYPE WATTS
PART NO.
SERIAL NO.
INPUT 115/230 VAC 50-400HZ
CAGE CODE 92606 USA
MOD 1 2 3 4 5 6
TEST
INTERROGATE
ACCESSORIES
REPEAT
OFF
STORE
ANTENNA
LIGHTS
OFF
Figure 1-1
T-48/T-48A MOD 3 Transponder Ramp Test Set
1.2 Purpose and Function of the Equipment
The T-48/T-48A MOD 3 Test Set (T/S), tests airborne ATCRBS MODE A & C and MODE S
transponders. It is self-contained and battery operated, that requires no direct hardware connection to the
equipment under test. The Test Set receives from and radiates signals to the Unit Under Test (UUT) from
an antenna supplied with the T/S. For MODE S and ATCRBS transponder tests, an antenna coupler unit is
provided to measure transponder transmitter power, receiver frequency, receiver sensitivity, and diversity
operation.
