User`s manual

A2500R24x – User’s Manual Page 21 of 35

Release Date 09/05/12

Table 5 shows available power levels from the device along with the corresponding PA_Table

minimizing interference and current consumption.

Table 5 Output Power vs. PA Table Value

2.3.1. USA and Canada

Within the USA and Canada, the A2500R24A and A2500R24C modules have been approved

for use as digitally modulated transmitters, for which they conform to the BW (a minimum of 500

kHz 6-dB BW for US, a maximum BW of 0.5% of the carrier frequency for Canada), power

spectral density (max of 8 dBm / 3 kHz), total output power (max 1W including the antenna gain)

and spurious radiation (harmonics and others including the restricted bands) requirements.

In a frequency-agile implementation or an implementation with multiple systems sharing the

same location, the user is encouraged to use only even channel numbers for 2-FSK, and every

or 4

channels for MSK modulations to avoid overlapping channels (127 channels for 2-FSK,

and 85 or 64 channels for MSK would thus be available).

It is encouraged to use a medium access technique which should include individual transceiver

nodes addressing; and should include a combination of a clear channel assessment, transmit

and detect, or a frequency hopping method. This ensures that the un-licensed band can be

shared with other systems/applications.

2.3.2. Europe

For Europe, the maximum allowed power is 100mW (20 dBm) with a maximum spectral power

density of 10mW/MHz (10 dBm/MHz); but there is no minimum occupied bandwidth

requirement.

For Europe a medium access protocol is required. The transceiver module provides the

following medium access services:

 Clear channel assessment

 8 bit address

 Receive packet qualification (Address, CRC)

 Packetized/Frame handling.

Power (dBm) PA_Table (Hex) Power (dBm) PA_Table (Hex)

1 0xFF -16 0x55

0 0xFE -18 0x93

-2 0xBB -20 0x46

-4 0xA9 -22 0x81

-6 0x7F -24 0x84

-8 0x6E -26 0xC0

-10 0x97 -28 0x44

-12 0xC6 -30 0x50

-14 0x8D -55 0x00