Novatel OM-20000041 Manuel D’Utilisation

D

Logs summary

MiLLennium GPSCard Software Version 4.50 Command Descriptions Manual Rev 1

197

Notes on Table D-5:

1. Bit 3: On OEM GPSCards, “ROM” includes all forms of non-volatile memory. 

2. Bits 12-15: Flag is reset to 0 five minutes after the last overrun/overload condition has occurred.

GPSCard example: 

All OK = 0000 0000 0000 1010 0000 0000 1111 1111 (binary) = 000A00FF (hexadecimal); using a VCTCXO oscillator.

1

This bit will be set to 1 if the antenna connection is not drawing excessive current.

0

If the antenna connections are shorted together then this bit will be clear (0) indicating a possible antenna

port problem.

1

When the 

L

1 

RF

 downconverter passes self-test, the bit will be set to 1.

0

If a fault is detected in the 

L

1 

RF

 downconverter, this bit is set to 0.

1

When this bit is set to 1, the receiver 

RAM

 has passed the self-test requirements.

0

If the bit has been set to 0, then 

RAM

 test has failed; please contact NovAtel Customer Service.

1

When this bit is set to 1, the receiver 

ROM

 test has passed the self test requirements.

0

A zero bit indicates the receiver has failed the 

ROM

 test.

1

This bit will be set to 1 when the digital signal processors (

DSP

) have passed the self-test requirements.

0

 0 indicates one or both of the 

DSP

 chips has failed self-test; please contact NovAtel Customer Service.

1

When set to 1, the 

L

1

AGC

 circuits are operating within normal range of control.

0

This bit will be set clear if the 

L

1 

AGC

 is operating out of normal range. Intermittent setting of the 

AGC

 bit

indicates that the card is experiencing some electro-magnetic interference of a very short duration.
Continuous setting of the 

AGC

 bit may indicate that the card is receiving too much signal power from the

antenna or that a more serious problem with the card may exist. Failure of this test could be the result of
various possibilities, such as: bad antenna 

LNA

, excessive loss in the antenna cable, faulty 

RF

downconverter, or a pulsating or high power jamming signal causing interference. If this bit is
continuously set clear, and you cannot identify an external cause for the failed test, please contact
NovAtel Customer Service.

1

When set to 1, the 

COM1

 

UART

 has passed the self-test requirements.   

0

If set to 0, the 

COM1

 

UART

 has failed self-test and cannot be used for reliable communications.

1

When set to 1, the 

COM

2 

UART

 has passed the self-test requirements.

0

If set to 0, the 

COM

2 

UART

 has failed self-test and cannot be used for reliable communications.

0

These bits indicate the state of the receiver time and are set only once, generally in the first few minutes

of operation, in the presence of adequate numbers of satellite signals to compute position and time.

1

If these bits are not all set to zero, then the observation data, pseudorange measurement, carrier phase, and

Doppler measurements may jump as the clock adjusts itself.

0

Normal operation is indicated when this bit is 0.