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SECTION 5
MAINTENANCE
5.1 PREVENTIVE MAINTENANCE
The equipment is a completely solid state design. Normal periodic inspection for cleanliness
and mechanical integrity should be made in accordance with standard procedures.
To prevent long and costly downtime of the unit periodic monitoring of the overall performance
parameters that are most indicative of individual component performance is necessary. A log
should be maintained that provides a permanent record of operation and compares it to factory
provided data. By doing so, any long term degradation, erratic or abnormal performance can be
detected. The overall performance parameters that are most indicative of system component
performance are gain and local oscillator frequencies.
Any excessive change in gain indicates a malfunction in the local oscillator and/or signal
channel and/or in the power supply. Any excessive frequency change indicates malfunction in
phase locking to the reference oscillator.
5.1.1 DC VOLTAGE
A set of power supply test points is available on the power supply. If voltage is beyond
tolerance (see Section 5.3.7), reset power supply (refer to Figure 4-1), using the tuning
adjustment on the power supply.
5.1.2 GAIN OF THE CONVERTER
The gain of the converter should be periodically monitored to reveal deviations which would
indicate possible malfunction.
5.1.3 FREQUENCY MEASUREMENT
Frequency accuracy of the converter is determined by the reference source used. Frequency
may be monitored at the front panel LO test points.
5.2 CORRECTIVE MAINTENANCE
If the unit malfunctions during normal use or if the tests in Section 6.2 reveal excessive
discrepancies in gain or local oscillator frequency, isolation and correction of the malfunction
becomes necessary.
While it is difficult to fully anticipate and describe all possible failure modes in a complicated
electronic system, this manual contains sufficient information in the form of theory of operation
and diagrams to enable an experienced technician to isolate and remove the malfunctioning
module.
IT IS STRONGLY SUGGESTED THAT ANY MALFUNCTIONING COMPONENT BE
RETURNED TO MITEQ FOR REPAIR.
