TECHNICAL NOTE – OPERATION OF MT4400 TWTA
08/10/2004
TN4400-3
MCL, INC.
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3.4.21 Event
Log
The Event Log can be obtained via the Computer, Remote, or Diagnostic Ports. The event log
is stored in Non-Volatile memory on the HPA and will contain operational state changes,
alarms, and faults, which have occurred in the HPA. The event log will contain the event name
with a date and time stamp for when the event occurred. Events that can be stored in the log are
listed in the following table. If one of the user adjustable trip levels is exceeded causing an
event entry, the level that was exceeded will also be stored in the log and presented on the
fourth line of the display.
The time resolution of the log will be to the nearest second (±1 second). The event log is able
to store 200 events. If the log size exceeds the available memory size the oldest events will
scroll out of the log. The log is purged only through a diagnostic interface command. The
event log can be downloaded through the diagnostic interface.
3.4.22 Communications Set Up
Communications are verified and set-up via the Diagnostic Port. Please use the Diagnostic
Program that came with the HPA. To set up or view the parameters look under the Settings
Tab.
4.0 HPA
OPERATION
4.1
HPA Control Modes
The MT4400 will be designed to provide continuous status to multiple interfaces all at the same
time; however, only one of these interfaces may control the operational states of the HPA at any
one time (these control modes are mutually exclusive). These interfaces are the Remote
Interface and Computer Interface.
4.1.1 Local
Control
While the HPA is in the Local mode, the operator will be able to operate the MT4400. This
mode can only be used for troubleshooting.
4.1.2 Remote
Control
4.1.2.1 Control
Priority
While the HPA is in the Remote mode, the operator at the Remote panel or device on the
remote interface will be allowed to control the HPA. While in the Remote mode, the Computer
Interface cannot change the operating state of the HPA, but they can still get status. From the
Remote panel the operator can pass control to or take control away Locally or from the
Computer Interface.
