PIXIE-DIL-PLFE Flexipanel, PIXIE-DIL-PLFE Datasheet - Page 8

• Manufacturer Part Number: PIXIE-DIL-PLFE
• Description: Zigbee / 802.15.4 Modules & Development Tools Pixie Zigbee Mod DIL swtchr Fast End FW
• Manufacturer: Flexipanel

Specifications of PIXIE-DIL-PLFE

• Wireless Frequency: 2.4 GHz
• Interface Type: UART, SPI
• Modulation: DSSS OQPSK
• Security: APS, NWK, MAC, ZDO
• Operating Voltage: + 2.1 V to + 3.6 V
• Output Power: 1 mW
• For Use With/related Products: PIC18LF4620

Radio Frequency
Optimizing RF Performance
The integral antenna supplied with Pixie is a modified
quarter wave F antenna with efficiency of approximately
70%. This is comparable to a dipole and about as high
as physically possible.
approximately omnidirectional.
Free space range is approximately 120m. In-building
ranges of 20m to 40m would normally be expected.
The
performance. Avoid the use of metal enclosures. Gray
and black plastics should be used with caution. They
often contain carbon, which degrades performance
considerably. To test for the presence of carbon, heat
the plastic in a microwave oven for one minute. If it
melts, it probably contains carbon.
p8
4. Press the generate button to create a file of MAC
5. .Each time programming session, select Load
addresses. When the file is created, dismiss the
Settings… dialog by pressing OK. The file that was
created contains a hex record each MAC address
containing nine RETLW instructions encoding the
address.
SQTP file… form the Programmer menu. In each
programming cycle, MPLAB will read one hex
record and inset the values into ROM locations
0x006A to 0x007B. It will then comment out the
line so it is not used again. In this way the MAC
addresses
sequence. NEVER maintain more than one copy of
the SQTP file, otherwise you risk duplicating MAC
addresses.
17-Mar-08
enclosure
will be automatically allocated in
employed
Pixie DS481-17
Its radiation pattern is
may
affect
© FlexiPanel Ltd
antenna
A high location is recommended, particularly for
avoiding interference from transient objects such as
passers-by and their cellphones. Microwave ovens are
particularly problematic for the short periods in which
they and operational.
antennas
polarizations are the same. In a mesh network, a highly
attenuating medium such as a floor may be bridged by
placing two routers close to each other, one on either
side of the barrier.
Mechanical
PCB Layout
For PCB pad layout, refer to the engineering drawing on
page 10.
protrude out from beneath the module. This provides a
point to apply heat when manually soldering and also for
continuity testing.
ensures a large reservoir of solder is available to the
actual contact area.
Soldering
If soldered using a reflow oven, the surface mount
module may be treated like a BGA package.
quality of the joint may be tested by checking for
continuity between the pad on the upper side of the
board and the protruding part of the pad on the main
board.
The recommended reflow profile is shown in figure 8.
Small increases in temperature (no larger than 15ºC)
may be needed depending on the density of the main
board. The module should be reflowed one time only.
Table 2. Attenuation of typical bulk materials
Material
Reinforced concrete floor
Brick wall with window
Office wall
Metal cabinet
5mm potting compound
Vegetation
In general attenuating most noticeably when closest to the antenna.
Patents may apply and/or pending
300
250
200
150
100
50
Compact materials, e.g. humans, have an complex effect,
0
0
in
Figure 8. Recommended reflow profile
Note how the pads on the main board
100
the
In addition, the size of the pad
same
Time, Seconds
200
Where possible, orient all the
Reduces range by factor of
direction
300
30
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1.25
2
3
2 - 3
1.25 per meter
so
400
that
500
their
The