Figure 1. Receiver sensitivity equipment setup.

Calibration Procedure For Transponder Set, Test Set An/Apm-378 Page Navigation
5

TB 9-4920-358-24

e. Set FUNCTION switch to LAMP TEST position. All front panel lamps will light.

f. Set FUNCTION switch to SELF TEST position.

g. Rotate MODE switch throughout all positions. ACCEPT lamp will light for each

mode checked.

h. Set MODE switch to any position and set TEST switch to MOM. ACCEPT lamp

will light.

i. Set FUNCTION switch to SYSTEM. REJECT lamp will light.

NOTE

Only settings listed are necessary for the measurement. Other

settings do not affect the measurement.

Set TI MODE switch to 2 and TEST switch to ON.

k. Connect equipment as shown in figure 1.

Figure 1. Receiver sensitivity equipment setup.

l. Initialize radar test set by selecting FUNCTION and ENTER. Set radar test set

INTERROGATOR menus as listed below:

(1) Menu 3 - M2 to 7700, RANGE DELAY to 0 s, SIF2 to OFF.

(2) Menu 14 - PRF to 257 PPS, 0 TRIG to INTERNAL.

(3) Menu 16 - SOURCE to LOW POWER.

m. Set signal generator for a 1090 MHz output frequency, 0 dBm output level, pulse

modulation and RF output to on.