Navman la000508 User Manual

LA000507G © 2006 Navman New Zealand. All rights reserved. Proprietary information and specifications subject to change without notice.

The environmental operating conditions of the Jupiter 20 are as follows:

temperature:  –40ºC to +85ºC
humidity

:    

up to 95% non‑condensing or a wet bulb temperature of +35ºC

altitude:     –304 m to 18 000 m
vibration:     random vibration IEC 68‑2‑64
max. vehicle dynamics: 500 m/s
shock (non‑operating):  18 G peak, 5 ms

The Jupiter 20 complies with the following:

Directive 2002/95/EC on the restriction of the use of certain hazardous substances in 

electrical and electronic equipment (RoHS)
CISPR22 and FCC: Part 15, Class B for radiated emissions
Automotive standard TS 16949
Manufactured in an ISO 9000 : 2000 accredited facility

The Jupiter 20 supports a code 128 barcode indicating the unit serial number. The Navman 

13‑character serial number convention is:

year of manufacture (e.g. 06 = 2006, 07 = 2007)

week of manufacture (1 to 52, starting first week in January)

manufacturer code

product and type

: product revision

sequential serial number

TTFF is the actual time required by a GPS receiver to achieve a position solution. This 

specification will vary with the operating state of the receiver, the length of time since the last 

position fix, the location of the last fix, and the specific receiver design.

3.1.1 Hot start
A hot start results from a software reset after a period of continuous navigation, or a return 

from a short idle period (i.e. a few minutes) that was preceded by a period of continuous 

navigation. In this state, all of the critical data (position, velocity, time, and satellite 

ephemeris) is valid to the specified accuracy and available in SRAM (Static Random Access 

Memory). Battery backup of the SRAM and RTC during loss of power is required to achieve a 

hot start.

3.1.2 Warm start
A warm start typically results from user‑supplied position and time initialisation data or 

continuous RTC operation with an accurate last known position available in memory. In this 

state, position and time data are present and valid but ephemeris data validity has expired.

3.1.3 Cold start
A cold start acquisition results when either position or time data is unknown. Almanac 

information is used to identify previously healthy satellites.

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