OEM7 Installation and Operation User Manual v4
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Chapter 4
Built-In Status Tests
The Built-In Status Test monitors system performance and status to ensure the receiver is oper-
ating within specifications. The test detects an exceptional condition and informs the user
through one or more indicators. The receiver status system is used to configure and monitor the
indicators:
1. Receiver status word (included in the header of every message)
2. ERROR strobe signal
3. RXSTATUSEVENT log
4. RXSTATUS log
5. Status LED
In normal operation, the error strobe is driven low and the status LED on the receiver flashes
green once every second. When an unusual and non-fatal event occurs (for example, there is no
valid position solution), a bit is set in the receiver status word. Receiver operation continues nor-
mally, the error strobe remains off and the LED continues to flash green. When the event ends
(for example, when there is a valid position solution), the bit in the receiver status word is
cleared.
When a fatal event occurs (for example, a receiver hardware failure), a bit is set in the receiver
error word, part of the
RXSTATUS
log, to indicate the cause of the problem. Bit 0 is set in the
receiver status word to show that an error occurred, the error strobe is driven high and the
status LED flashes red and yellow showing an error code. An
RXSTATUSEVENT
log is generated
on all ports to show the cause of the error. Receiver tracking is disabled but command and log
processing continues to allow error diagnosis. Even if the source of the error is corrected, the
receiver must be reset to resume normal operation.
These two scenarios describe factory default behavior. These behaviors can be customized to
better suit an individual application. RXSTATUSEVENT logs can be disabled completely with the
UNLOG
command. RXSTATUSEVENT logs can be generated when a receiver status bit is set or
cleared with the
STATUSCONFIG SET
and
STATUSCONFIG CLEAR
commands. Bits in the
receiver status word can also be promoted to act like error bits with the
STATUSCONFIG
PRIORITY
command.
4.1 Receiver Status Word
The receiver status word indicates the current status of the receiver. This word is found in the
header of all logs and in the
RXSTATUS
log. In addition, the receiver status word is con-
figurable.
The importance of the status bits can be determined with priority masks. For receiver status, set-
ting a bit in the priority mask causes the condition to trigger an error. The error causes the
receiver to idle all channels, turn off the antenna and disable the RF hardware, just like it would
if a bit in the receiver error word is set. Setting a bit in an Auxiliary Status priority mask causes
the condition to set the bit in the receiver status that corresponds to the auxiliary status.
Use the
STATUSCONFIG
command to configure the various status mask fields in the
RXSTATUS
log. Use the masks to specify whether various status fields generate errors or event
messages when set or cleared.
