TM 5-6350-280-23&P
Table 4-2. Troubleshooting Table - continued.
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
TEST EQUIPMENT
DUAL TRACE OSCILLOSCOPE
TWO ONE TO ONE PROBES WITH
A PROBE GROUND CONNECTED TO
GROUND PIN ON CPU CCA, A
PROBE CONNECTED TO RXD PIN
OF CPU CCA, AND B PROBE
CONNECTED TO TXD PIN OF
CPU CCA.
SETTINGS
DISPLAY MODE:
A AND B
SYNC:
INTERNAL
INPUT COUPLING:
DC
VOLTS PER DIVISION:
2V DC
TIME PER DIVISION:
1 MILLISECOND
PERSISTENCE:
ON
TRIGGER ON:
A
TRIGGER:
NEGATIVE
PROBE B:
INV
NOTE 1 EACH WAVEFORM IS APPROXIMATELY 5 VOLTS PEAK TO PEAK
Figure 4-3. RX and TX Data Signals.
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