Information Modes; Normal; Extended Information Mode (Eim) - Javad JNSGyro-2T Operator's Manual

Information Modes

Normal

Extended Information Mode (EIM)

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The JNSGyro-2T system has two information modes: Normal and Extended
Information Mode (EIM).
In normal mode, the STAT LED of each board indicates the number of
tracked satellites and the position's computation status.
Extended Information Mode is used for JNSGyro-2T testing purposes. In
this mode, the system continues to work as usual, but the STAT LED indi-
cates the following "extended" information:
• Delimiter - an easily distinguishable double-blink that shows the overall
status of tests performed in EIM. The STAT LED color for delimiter is
calculated from the colors of other STAT LED blinks.
–Orange: at least one blink is orange.
–Red: no orange blink and at least one red blink.
–Green: all other cases.
• Sufficient data for position computation.
• GPS S/N ratios are good (Table 4-2).
• GLONASS S/N ratios are good (Table 4-2).
• Oscillator's frequency offset is less than three ppm.
• Oscillator's Allan Variance is better than 2.7e-10.
• Continuous tracking time is more than 15 minutes.
Table 4-2. Signal-to-Noise (S/N) «Good» Ratios
GPS
GLONASS
In EIM, the STAT LED blinks seven times per cycle. Each blink could be
orange, red, or green.
• Orange – information for test unavailable.
• Green – system passed the test.
CA/L1 P/L1
51 39
51 49
O P E R A T I O N
Using MinPad
P/L2
39
40
JNSGyro-2T Operator's Manual 49