TM 5-6350-280-23&P
Table 4-2. Troubleshooting Table - continued.
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
1. REMOTE AREA COM-FAIL - continued.
TEST EQUIPMENT
DUAL TRACE OSCILLOSCOPE
TWO ONE TO ONE PROBES (DO NOT GROUND PROBES)
SCOPE SETTINGS
DISPLAY MODE: A & B WITH ONE CHANNEL INVERTED
SYNC: INTERNAL
INPUT COUPLING: BOTH CHANNELS ON DC
VOLTS PER DIVISION: .5 VOLTS (ADJUST AS REQUIRED )
TIME PER DIVISION: 1 MILLISECOND ( ADJUST AS REQUIRED )
TRIGGER: A
NOTE 1
WAVEFORM SHIFTS BETWEEN TWO FREQUENCIES AND A MAXIMUM OF 2 VOLTS PEAK TO PEAK.
NOTE 2
THE SIGNAL HAS BEEN CHANGED FROM AN FSK SIGNAL TO A SQUARE WAVE ( REFER TO NOTE 2
OF FIGURE 4-2 ).
Figure 4-1. FSK Data Signals from Data Transmitters.
4-4
