Information Modes; Normal; Extended Information Mode (Eim) - Javad JNSGyro-4T Operator's Manual

O P E R A T I O N
4
Using MinPad

Information Modes

The JNSGyro-4T system has two information modes: Normal and Extended
Information Mode (EIM).

Normal

Extended Information Mode (EIM)

4-6 JNSGyro-4T Operator's Manual
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-4T testing purposes.
In this mode, the system continues to work as usual, but the STAT LED
indicates 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 51
GLONASS 51
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
39
49
P/L2
39
40
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