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Fire Controlman Volume 06-Digital Communications | Next
SUMMARIZE |
Figure 3-9.—The LMS-11 Status display.
LMS— Should always be green.
LSN— Indicates that the LMS-11 is listening
for the link audio.
PRE— Indicates that a preamble has been
detected.
PHA— Indicates that a phase reference frame
has been detected.
CC1— Indicates the first frame of a control
code.
CC2— Indicates the second frame of a control
code.
EOT— Indicates that the LMS-11 has
detected the end of transmission.
NOIS— Indicates that the received data frame
did not pass the data quality test.
DATA— Indicates that the LMS-11 has
detected a data frame that has passed the
quality test. Note that the control codes and
phase reference frames are also data frames.
REC— Shows the status of the raw record
function of the LMS-11. The indicator will be
green when the recording is turned on and red
when the recording is stopped.
The last two fields of the status box indicate the
performance of the net. The “%DATA:” field will be
followed by a number representing the percentage of
net cycle time that message data is transmitted with
no errors. The “NCT:” displays the net cycle time in
seconds. Net cycle time is the time required for one
complete polling of the net. It can be measured from
control stop to control stop from the NCS, or the
operator can specify a PU to be the reference for net
cycle time. The operator can also specify the number
of cycles to use to determine net cycle time. The
operator makes these entries using the summarize
parameter in the NET DISPLAY mode.
Net Display
The Net Display mode is activated when the
operator presses the NET key on the keyboard. The
Net Display mode presents the following two separate
types of information: a Net Summary (summarize
mode) or a PU History (history mode). In the Net
Summary mode, the Net Display presents a summary
of quantitative information about the performance of
up to 21 PUs. In the PU History mode, the LMS-11
displays the most recent 21 transmissions for a
selected PU.
The Net Display mode is only available when the
link is in the Roll Call mode. Figure 3-10 shows a
screen for the Net Display in the Summarize mode
and figure 3-11 shows the screen for a PU History
mode.
After the operator enters the Net Display mode,
there are four operator entries that can affect the
information and how it is displayed. These entries are
NCS, PU, SIDEBAND, and SUMMARIZE. All of
the entries are displayed as part of the header of the
Net Display screen. The NCS, PU, and SIDEBAND
fields are on the left side of the screen, and the
SUMMARIZE field is on the right side of the screen
just below the date and time fields.
3-12
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