TM 11-5841-283-34-1/NAVAIR 16-30APR39-2
Section IV TROUBLESHOOTING
Para
Page
Subject
Test Adapter Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-9
Troubleshooting of Control Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-10
Troubleshooting of Radar Signal Indicator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-11
Troubleshooting of Comparator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-12
Troubleshooting of Receiver . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-13
Tests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Self-test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-15
OVERVIEW
This section gives instructions for troubleshooting of the following:
Control unit
Radar signal indicator
Receiver
All voltage and resistance or continuity measurements are made using the multimeter.
Measure voltage at test point (TP) with ground Iead of multimeter connected to chassis of unit
under test.
Measure resistance or continuity with test adapter power off and connecting cables to unit
disconnected.
All waveform measurements are made using the oscilloscope.
Measure waveforms at test point (TP) with ground Iead of oscilloscope connected to chassis of
unit under test.
Pulse width measurements must be made at the half power point. To measure pulse width at half
power:
Adjust input signal on oscilloscope to -3 dBm.
Adjust vertical control to set waveform peak on zero graticule.
Increase adjustment of input signal again to 0 dBm.
Measure pulse width at zero graticule.
2-10
Previous Page
