MNZB-DKL-900 MeshNetics, MNZB-DKL-900 Datasheet - Page 28

• Manufacturer Part Number: MNZB-DKL-900
• Description: KIT DEV ZIGBIT 900 LITE 45DAYS
• Manufacturer: MeshNetics
• Type: 802.15.4/Zigbeer

Specifications of MNZB-DKL-900

• Frequency: 868MHz, 915MHz
• For Use With/related Products: MNZB-900-B0
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 758-1010

© 2008 MeshNetics
3.8. Measuring Power Consumption
3.9. Antenna Precautions
The board allows measuring power consumption of the ZigBit 900 module. To perform the
measurements, simply connect ammeter to the clamps denoted as CM+ and CM- and
remove jumper J1. Make sure that the board is powered by batteries only. However, such
measurement would not be absolutely correct, because power is consumed by the
interfaces and the peripherals connected to ZigBit 900. To measure power consumption
correctly, all interfaces should be disconnected from ZigBit 900 module, excluding RF
ports. Refer to the Application Note [6] for details.
Antennas were matched and tuned with taking into account all adjacent components,
including the ZigBit 900 module shield, battery compartment and plastic legs. Any object
approached or put closely next to antenna affects its performance. Do not put the module
into enclosure. Do not mount the board on metal surface. Do not use metal screws over 5
mm long to fasten the board legs. These factors would affect antenna performance.
Mount plastic legs from bottom side only, next to the battery compartment). Use plastic
screws to fasten the legs. Do not use the legs made of different plastic composite.
Omitting these plastic legs would significantly affect antenna performance.
The pattern of antenna is wide. The following facts should be considered. In far-field zone,
it is a horizontal plane normal to the dipoles where electromagnetic radiation appears
stronger. Contrarily, at distances of several centimeters the pattern is more complex.
Approximate field patterns are given in the ZigBit 900 datasheet [1].
Handle the external antenna with care to avoid mechanical damage.
Z I G B I T ™ 9 0 0 D E V E L O P M E N T K I T 1 . 3
U S E R ’ S G U I D E
Page 28/56