QPRO Technical Data Sheet
Document 1137-0901, REV A
17
4.7
Customer Interface (Internal)
4.7.1 Memory
•
2 Mbytes standard of Flash and RAM.
•
4/8 Mbytes optional
The Q4000 can have 3 different memory configurations: 2MB, 4MB and 8 MB.
Table 4-2, User Flash and RAM Availability
2 MB
4 MB
8 MB
Available Flash
~1 MB
2 MB
4 MB
Available RAM
0.5MB
2 MB
4 MB
A minimum of 100,000 raw program erase cycles are expected from the flash manufacturer before possible
failure. For Raw Flash, there are 64K Flash Sectors and each Flash File System Block is 512 Bytes. It is
recommended to write files that are 64K or larger to ensure that a whole Flash File System Block is written.
4.7.2 Real-Time Clock (RTC)
•
Programmable
4.8
Environmental Considerations
The QPRO has been specifically designed for harsh environments. As an OEM product, it is housed in an IP-
67 rated enclosure.
•
Operating Temperature
o
–40C to 85C
•
Storage Temperature
o
–50C to 85C.
•
Low Pressure
o
Up to 4 hours at 15000 ft elevation pressure
•
Humidity
o
Relative humidity range of 0% to 95% non-condensing at 65C
o
Humidity Test in ORBCOMM Spec E25050102 REV D is per MIL SPEC 810E, Method 507.3
with test conditions.
Procedure I, Cycle 2
Procedure 1 simulates natural environmental cycles and it is conducted on test
items which are open to the environment of frequently ventilated, Cycle 2 set
temperature at 24 deg C constant with humidity maintained at 95% minimum. Test
Duration: 15 Cycles (15 days )
•
Cyclic Humidity
o
Temperature/Cyclic Humidity Test 5 days at -10C to 65C at 85% relative humidity
•
Thermal Shock
o
-40C to 85C (30 minutes at each temp, 10 cycles)
•
Shock
o
Mechanical shock of a 20G, saw tooth profile, over an 11 msec period. (Three positive and
three negative shocks in each of three mutually perpendicular axes)
o
SAEJ1455 shock requirements and those in MIL-STD-810E [10].
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