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Operator Maintenance Error and Warning/Status Messages
MG369XB OM 6-7
Error Message Description/Remarks
Error 142
Sample and Hold Circuit
Failed
Indicates a failure of the sample and hold circuitry on the A6 PCB`. The MG369XB
still operates normally, but the RF output may be unleveled during pulse modula
-
tion.
Error 143
Slope DAC Failed
Indicates a failure of the level slope DAC on the A6 PCB. The MG369XB still oper
-
ates normally, but RF output level flatness may be affected during frequency
sweeps.
Error 144
RF was Off when Self-test
started. Some tests were
not performed.
Indicates that some self-tests were not performed because RF output was selected
OFF on the MG369XB front panel. Press the OUTPUT key to turn RF Output ON
and run the instrument self-test again.
Error 145
AM meter or associated
circuitry failed
Indicates a failure of the internal AM circuitry and loss of the capability to provide
amplitude modulation of the RF output signal using modulating signals from the in
-
ternal AM generator. The MG369XB may not provide amplitude modulation of the
output signal using modulating signals from an external source.
Error 147
Internal FM circuitry failed
Indicates a failure of the internal FM circuitry and loss of the capability to provide
frequency modulation of the RF output signal using modulating signals from the in-
ternal FM generator. The MG369XB may not provide frequency modulation of the
output signal using modulating signals from an external source.
Error 148
Pulse 100 MHz reference
circuitry failed
or
Error 148
Pulse 40 MHz reference
circuitry failed
Indicates a failure of the pulse generator 100 MHz oscillator circuitry. The pulse
generator may still function; however, the 100 MHz oscillator is not phase locked to
the 10 MHz reference time base. The pulse modulation function may not operate.
Indicates a failure of the pulse generator 40 MHz oscillator circuitry. The pulse
generator may still function; however, the 40 MHz oscillator is not phase locked to
the 10 MHz reference time base. The pulse modulation function may not operate.
Table 6-1. Self-Test Error Messages (4 of 4)