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5.10
Fault State
The CHPA features Auto Fault Recycle mode; this feature allows the unit to return to a normal
operating state after a transient fault. When a fault occurs, the unit enters the Fault state. After a
brief interval, the unit tries to return to the previous state. If three faults occur within a 20-
second period, the unit latches in the Fault state. Once the unit is latched in the Fault state, clear
the fault source and then press the CANCEL button to return to the Standby state.
If fewer than 3 faults occur within 20 sec, the unit recycles to the previous operating state. The
RECYCLED FAULT LED will continue to flash when the unit successfully recycles from a fault.
Press CANCEL to stop this LED from flashing.
While in the Fault state, the display will flash and the beeper will sound once every second. The
current fault(s) is/are displayed on Line 2; press either arrow key to cycle through these faults.
To view faults that occur during the Auto Fault Recycle mode, look at the Fault Log (see
Appendix B for a full description). The following screen shows the unit after it is latched in the
Fault state.
L O C A L
H I G H
R E F L
H L X
0 . 0 0 K V
A T T E N U A T O R
5.11
CHPA Control Modes and Hierarchy
The CHPA may be controlled from five points:
•
RF Switch port
•
Interlock interface
•
Local—All control occurs on the front panel.
•
Remote—All control occurs on the Serial Remote.
•
Computer—All control and monitoring occur on the remote computer.
The RF Switch port and Interlock interface connect to switching systems and user-defined
interlocks. The RF Switch port and Interlock interface have the highest level of control. They are
active at all times; all commands that are issued by the user through these ports must be
acknowledged and acted upon if the CHPA may physically do so.
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THIS DOCUMENT IS THE PROPERTY OF COMMUNICATIONS & POWER INDUSTRIES.
REPRODUCTION OR RELEASE WITHOUT EXPRESS PERMISSION IS STRICTLY PROHIBITED
F A U L T
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ERIES
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