P440 Data Sheet / User Guide
DRAFT
39
every time a packet is transmitted.
Any behavior other than what is described above should be considered to be a fault.
4.10 Heat Management
The P440 consumes approximately 2 watts. By way of reference this is approximately the same
power consumption as a typical cell phone. While this isn’t very much power, this energy is
sufficient to warm the board. In some extreme cases, this can cause issues. For example, if the board
is operated in a sealed enclosure, in a high ambient temperature, with solar heating then the resulting
thermal rise can raise the board temperature above its rated limit.
The P440 is equipped with a built in temperature sensor which will report the board temperature.
The user should monitor this temperature sensor and insure that the unit is not operated in excess of
the maximum rated temperature.
The following examples are provided to illustrate the effect of self heating on temperature rise.
Case 1: Ambient 23
°
C, bare board sitting on a table with light air circulation. Board Temp: 32
°
C
Case 2: Ambient 23
°
C, bare board sitting on a table in still air.
Board Temp: 41
°
C
Case 3: Ambient 23
°
C, board mounted in Time Domain enclosure accessory.
Board Temp: 47
°
C
4.11 Accessories
When the P440 is ordered as part of a Development Kit or Lab, it is provided with a number of
accessories. These accessories include: a custom plastic enclosure, a power supply, USB battery and
cabling and antennas. Ranging Kits are supplied with 1 antenna per P440 while Radar Kits and Labs
are provided with 2 antennas per P440. Units shipped outside the US are typically provided with a
power plug adapter to ensure compatibility with the user’s AC power plugs. This is illustrated in
Figure 25
.
Fig. 25: P440 with full set of accessories
