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Operations
"cycle" - the station is in cycle selection, or has a cycle error.
"track" - the station has acquired the signal, has successfully cycle
selected, and is tracking the signal.
The bottom line shows the SNR (Signal to Noise Ratio, from 0 to 99),
the cycle data 1 (0 to 99), and the cycle data 2 (0 to 99). These numbers
are a measure of the signal strength and accuracy. Cycle 1 data should
be less than 50, and Cycle 2 data should be greater than 50. The greater
the difference between the Cycle 1 value and the Cycle 2 value, the
more accurate the position. The bottom line also shows the station
secondary status. Secondary status is displayed as "Bnk" (blink),
and/or "SNR" (Signal to Noise Ratio). Secondary station status is used
to determine if the signal is useful. The station may not be used if it is in
a blink (BNK) condition, or the SNR is too low. In this example, Loran
1 GRI1 is 9940. The Master station is in cycle, the SNR is 8, and the
Cycle 1/2 data is 48/51. The Station shows a low SNR condition.
Secondary Station Information
The display below shows the signal information for secondary station
W (Whisky). A similar display appears for each secondary station
tracked by each Loran sensor. The top line displays the Loran sensor
number, GRI number, and GRI identifier. The middle line shows the
station, TD (time difference), and tracking status. The bottom line
shows the SNR, Cycle Data 1 and 2, and the secondary status. If the
station is in search , the coding delay will be displayed in place of the
TD. In the example below, the display shows Station W in GRI 9940 is
being tracked, and has a TD of 12660.90. The SNR is 99, and the
Cycle1/2 data is 14/86.
SYS Mode Displays
SYS
SYS
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