Chapter 3 | Installation |
3.5.1Non Volatile Memory
The receiver stores different types of information used to accelerate the TTFF and to configure the I/O in NVM. See Table 5 below for a partial list of the data stored in NVM.
| Table 5: |
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Parameter |
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| Notes |
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ALMANAC |
| The most recent almanac |
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LAST POSITION |
| Position in NVM is updated at different rates depending on the | ||
| application. The last known position is always kept in battery back- | |||
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| up SRAM. |
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DGPS CONFIGURATION |
| Differential GPS configuration |
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| Contains the following configuration information: | ||
TTL CONFIGURATION |
| 1. | Mode of operation | 4. Time Alignment Mode State |
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| 2. | Baud Rate: 300 to 19200 | 5. Mask Angle |
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| 3. | Default Binary message list | 6. Datum |
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3.6Default Configuration
Below is the SUPERSTAR II’s default configuration with no valid NVM elements:
Protocol on port #1: | Binary |
Baud Rate on port #1: | 9600 |
Protocol on port #2: | |
Baud Rate on port #2: | 9600 |
DGPS Correction Timeout: | 45 seconds |
Default Message List: |
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Binary: | Navigation Status User Coordinates (Message ID# 20) @ 1Hz |
NMEA: | GGA @ 1Hz |
Time Align Mode: | ON |
1. The data contained in NVM is always used if the DISC_IP2 is left unconnected or tied to HI logic.
2.The default data transfer rate is 9600 bps unless your receiver model has Carrier Phase Output (CP) capability in which case it may be 19200. A list of models is in Appendix A of the L1 GPS Firmware Reference Manual and in our Price List available from the Sales side menu of our website at www.novatel.com.
3.If DISC_IP2 is tied to LO logic, the default ROM configuration will be used and the following parameters will not be read from NVM:
Position
Almanac
Time
UTC Correction and IONO Parameters
TCXO Parameters
26 | SUPERSTAR II User Manual Rev 3 |
