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Operator Maintenance Error and Warning/Status Messages
MG369XB OM 6-5
Error Message Description/Remarks
Error 115
Not Locked Indicator Failed
Indicates a failure of the phase-locked indicator circuit. The MG369XB is still opera
-
ble, but an error message will not appear on the data display when the output fre
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quency is not phase-locked.
Error 116
FM Loop Gain Check Failed
Indicates that the FM loop has failed or the loop gain is out of tolerance. The
MG369XB is still operable, but the frequency accuracy and stability are degraded.
Error 117
Linearizer Check Failed
Indicates a failure of the linearizer DAC on the A5 PCB. The MG369XB is still oper
-
able, but the frequency accuracy of the RF output is degraded.
Error 118
Switch point DAC Failed
Indicates a failure of the switch point DAC. The MG369XB is still operable, but will
not generate a CW Ramp.
Error 119
Center Frequency Circuits
Failed
Indicates a failure of the center frequency circuitry. Do Not Attempt to Operate!
Refer the instrument to a qualified service technician.
Error 120
Delta-F Circuits Failed
Indicates a failure of the DF width DAC on the A5 PCB. The MG369XB will not gen-
erate DF analog sweeps, but should produce DF step sweeps.
Error 121
Unleveled Indicator Failed
Indicates a failure of the leveled detector circuitry. The MG369XB is still operable,
but a warning message will not appear when the RF output is unleveled.
Error 122
Level Reference Failed
Indicates a failure of the level reference circuitry. Use caution and always determine
the output power level when operating the MG369XB in this condition.
Error 123
Detector Log Amp Failed
Indicates a failure of the level detector log amplifier circuitry. Use caution and al-
ways determine the output power level when operating the MG369XB in this condi
-
tion.
Error 124
Full Band Unlocked and Unleveled
Indicates a failure of both YIG-tuned oscillators. Do Not Attempt to Operate! Refer
the instrument to a qualified service technician.
Error 125
8.4 – 20 GHz Unlocked and
Unleveled
Indicates a failure of the 8.4 to 20 GHz YIG-tuned oscillator. Do Not Attempt to
Operate! Refer the instrument to a qualified service technician.
Error 126
2 – 8.4 GHz Unlocked and
Unleveled
Indicates a failure of the 2 to 8.4 GHz YIG-tuned oscillator. Do Not Attempt to Op
-
erate! Refer the instrument to a qualified service technician.
Error 127
Detector Input Circuit
Failed
Indicates a failure of the level detector input circuitry. Use caution and always deter
-
mine the output power level when operating the MG369XB in this condition.
Error 128
.01 – 2 GHz Unleveled
Indicates a failure of the down converter leveling circuitry. The MG369XB operates
normally but will have unleveled RF output in the 0.01 to 2 GHz frequency range.
Error 129
Switched Filter or Level
Detector Failed
Indicates a failure of either the switched filter or level detector circuitry. The
MG369XB may not produce an RF output. Use caution and always determine the
output power level when operating the MG369XB in this condition.
Table 6-1. Self-Test Error Messages (2 of 4)